In this chapter, we will study the effects of electric current : Moving charges or electric current generates a magnetic field. This is useful to CBSE Students.
The document discusses the magnetic effects of electric currents. It describes how Hans Christian Oersted discovered in 1820 that a compass needle is deflected near a current-carrying wire, showing that electric currents produce magnetic fields. It explains that a compass or magnet can detect the magnetic field surrounding another magnet or a current-carrying conductor.
Electric charges
Current
Potentialand its difference
Circuits
Heating effects
Magnetic effects
Magnetic Field Lines in straight and coiled conductors
Electromagnets
Electromagnetic Induction
Motors and Generators
- Electromagnetic induction occurs when a changing magnetic field induces an electromotive force (emf) in a conductor. This induced emf can drive an electric current.
- Faraday's law of induction states that the induced emf in a coil is proportional to the rate of change of the magnetic flux through the coil. A changing magnetic field is necessary to induce an emf and current.
- Lenz's law describes the direction of the induced current: the current will flow in the direction that opposes the change producing it. This ensures the law of conservation of energy is obeyed.
- Transformers take advantage of electromagnetic induction to change the voltage of an alternating current (AC) while transmitting power efficiently over
This document provides a 3-paragraph summary of a lesson on electromagnetism:
The lesson will extend knowledge about the effects of electricity, how moving electrons create magnetic fields, and basic principles of magnetic effects of current. It will cover magnetic field lines and how they are demonstrated using iron filings, the magnetic field created by electric current in different conductor shapes like solenoids and loops, and the force on a current-carrying conductor in a magnetic field. Experiments are described to visualize these concepts and understand the direction of fields and forces using rules like the right-hand rule. The document outlines the topics to be covered in the lesson in detail.
This document discusses magnetic circuits and concepts related to magnetism. It defines a magnet and explains that magnets have north and south poles where iron filings accumulate. It then describes the two laws of magnetism - like poles repel and unlike poles attract, and the force between poles is directly proportional to the product of their strengths and inversely proportional to the square of the distance between them. The document goes on to define magnetic field, magnetic lines of force, magnetic flux, pole strength, magnetic flux density, and how an electric current can produce magnetism in electromagnets. It concludes by explaining conventions for representing current direction and magnetic field direction graphically.
Magnets have north and south poles that exert magnetic forces, attracting opposite poles and repelling like poles. Magnets create magnetic fields that can either attract or repel other magnets or iron entering the field. The Earth has its own magnetic field created by its molten iron core, which causes compasses to align with the magnetic north pole that is offset from true geographic north by around 9 degrees.
Magnetic Effects of Electric Current 10th PhysicsSHIVAM RANJAN
1. A magnet is a substance that produces a magnetic field and attracts other ferromagnetic materials like iron.
2. There are natural magnets found in nature, like lodestone, and artificial magnets can be created by rubbing an iron bar with a natural magnet.
3. A magnet has two poles - a north pole and a south pole. Opposite poles attract while like poles repel. Magnetic fields emerge from the north pole and enter through the south pole.
The document discusses the magnetic effects of electric currents. It describes how Hans Christian Oersted discovered in 1820 that a compass needle is deflected near a current-carrying wire, showing that electric currents produce magnetic fields. It explains that a compass or magnet can detect the magnetic field surrounding another magnet or a current-carrying conductor.
Electric charges
Current
Potentialand its difference
Circuits
Heating effects
Magnetic effects
Magnetic Field Lines in straight and coiled conductors
Electromagnets
Electromagnetic Induction
Motors and Generators
- Electromagnetic induction occurs when a changing magnetic field induces an electromotive force (emf) in a conductor. This induced emf can drive an electric current.
- Faraday's law of induction states that the induced emf in a coil is proportional to the rate of change of the magnetic flux through the coil. A changing magnetic field is necessary to induce an emf and current.
- Lenz's law describes the direction of the induced current: the current will flow in the direction that opposes the change producing it. This ensures the law of conservation of energy is obeyed.
- Transformers take advantage of electromagnetic induction to change the voltage of an alternating current (AC) while transmitting power efficiently over
This document provides a 3-paragraph summary of a lesson on electromagnetism:
The lesson will extend knowledge about the effects of electricity, how moving electrons create magnetic fields, and basic principles of magnetic effects of current. It will cover magnetic field lines and how they are demonstrated using iron filings, the magnetic field created by electric current in different conductor shapes like solenoids and loops, and the force on a current-carrying conductor in a magnetic field. Experiments are described to visualize these concepts and understand the direction of fields and forces using rules like the right-hand rule. The document outlines the topics to be covered in the lesson in detail.
This document discusses magnetic circuits and concepts related to magnetism. It defines a magnet and explains that magnets have north and south poles where iron filings accumulate. It then describes the two laws of magnetism - like poles repel and unlike poles attract, and the force between poles is directly proportional to the product of their strengths and inversely proportional to the square of the distance between them. The document goes on to define magnetic field, magnetic lines of force, magnetic flux, pole strength, magnetic flux density, and how an electric current can produce magnetism in electromagnets. It concludes by explaining conventions for representing current direction and magnetic field direction graphically.
Magnets have north and south poles that exert magnetic forces, attracting opposite poles and repelling like poles. Magnets create magnetic fields that can either attract or repel other magnets or iron entering the field. The Earth has its own magnetic field created by its molten iron core, which causes compasses to align with the magnetic north pole that is offset from true geographic north by around 9 degrees.
Magnetic Effects of Electric Current 10th PhysicsSHIVAM RANJAN
1. A magnet is a substance that produces a magnetic field and attracts other ferromagnetic materials like iron.
2. There are natural magnets found in nature, like lodestone, and artificial magnets can be created by rubbing an iron bar with a natural magnet.
3. A magnet has two poles - a north pole and a south pole. Opposite poles attract while like poles repel. Magnetic fields emerge from the north pole and enter through the south pole.
This document provides information about Earth's magnetism and magnetic fields. It explains that Earth's magnetic field is generated by a dynamo effect in the planet's liquid iron core, similar to how a bicycle dynamo works. It also defines key terms related to magnetism, including uniform and non-uniform magnetic fields, magnetic field lines, magnetic poles, dipoles, permeability, and susceptibility. The document discusses how Earth's magnetic field behaves similarly to a bar magnet and protects the planet, while hot temperatures cause metals to lose their magnetic properties.
This document provides an overview of magnetism and magnetic fields. It discusses that magnetism is caused by the motion of charged particles and the strongest force is at the poles. Magnetic fields are represented by lines and form closed loops. Permanent magnets are often made of steel and electrons align to produce magnetic fields. Magnets can lose magnetism through heating, striking, or placing similar poles together. Larger magnets are not necessarily stronger. Maglev trains use magnetic fields for lift, propulsion and guidance.
This document provides an overview of electromagnetism concepts for 10th grade students. It discusses magnetic field lines and their properties, the magnetic field created by current-carrying conductors using the right-hand rule, and the force experienced by conductors in magnetic fields. It also describes electromagnetic induction, the working principles of electric motors and generators, different current types, domestic electric circuits, and safety measures for working with electricity. Real-world applications of these concepts in technologies like MRI machines, trains, and power transmission are also mentioned.
Plane waves reflection refraction and polarization by dinesh.V.rajdineshraj007
This document provides an overview of electromagnetic theory, specifically plane waves, reflection, refraction, and polarization. It discusses key topics such as the properties of plane waves, boundary conditions, reflection and refraction laws, total internal reflection, dispersion, polarization, Brewster's angle, and applications of electromagnetic waves including antennas and optical fibers. The document was a joint effort between Dinesh raj, Rohit, and others to explain these fundamental concepts of electromagnetic theory.
The document discusses various topics related to magnetism including:
- The ancient discovery of magnetism in lodestone by the Chinese in 2000 BC who used it for navigation.
- The properties of magnets including having magnetic fields with poles that attract or repel other magnets and magnetic materials.
- Induced magnetism caused by an external magnetic influence.
- Differences between magnetic, non-magnetic, and magnetized materials and how to test for magnetism.
- Electrical and physical methods of magnetization and demagnetization.
- Plotting magnetic field lines using a compass to map field patterns.
A compass needle is placed under a copper wire carrying an electric current. When current is passed through the wire, the compass needle deflects, showing that the current produces a magnetic field that exerts a force on the compass needle. This demonstrates that electricity and magnetism are linked. The magnetic field produced by a current has concentric circular field lines around the wire. Increasing the current increases the magnetic field strength.
The document discusses electromagnetism induction, which is the production of an electric current from a changing magnetic field. It occurs when there is relative motion between a conductor and magnetic field lines. An induced current is produced when a conductor cuts across magnetic flux lines or when there is a change in the magnetic flux linking a coil. The direction and magnitude of the induced current can be determined by Lenz's law and Faraday's law of induction. Examples of devices that use electromagnetism induction include direct current generators, alternating current generators, and moving coil microphones.
Electromagnetism is a branch of physics involving the study of the electromagnetic force, a type of physical interaction that occurs between electrically charged particles. The electromagnetic force usually exhibits electromagnetic fields such as electric fields, magnetic fields, and light, and is one of the four fundamental interactions (commonly called forces) in nature. The other three fundamental interactions are the strong interaction, the weak interaction, and gravitation.[1] At high energy the weak force and electromagnetic force are unified as a single electroweak force.
Magnetic effects can be produced by electric currents. When a current flows through a conductor, it creates a magnetic field around the conductor. Three key relationships govern magnetic fields: (1) like magnetic poles repel and opposite poles attract, (2) the strength of a magnetic field depends on the amount of current and number of turns in a coil, and (3) changing magnetic fields can induce electric currents in nearby conductors based on Lenz's law. Electromagnets and transformers take advantage of these relationships to manipulate magnetic fields for applications like motors, generators, and power transmission.
Electricity is a form of energy that can be changed into other forms. Electric current is the flow of electrons through a conductor due to a voltage difference provided by a power source like a battery. An electric circuit is a continuous loop or path that allows electric current to flow from the positive terminal of a battery or other power source through components like wires, light bulbs, and back to the negative terminal. Circuits can be arranged in series or parallel configurations, which determine how components are connected and how current and resistance are calculated. Heat is generated by the resistance of components in a circuit as electric current passes through due to the conversion of electrical energy into thermal energy.
Magnetism is considered as one component of electromagnetic forces which refers to physical phenomena arising from the force caused by magnets, objects that create fields that attract or repel other objects.
Very important Chapter of physics because it contains all the important laws needed to understand concepts in physics.
And i hope it will be helpful to you
Magnetic effect of electric current of class 10th.All you need from this chapter is available here.convenient for studying this chapter of class 10 NCERT book.BEST FOR EXAMS!
Most electricity in the US is produced using steam turbines in power plants. Coal is commonly burned to heat water and produce steam, which spins the turbine and generates electricity. This electricity is sent through transformers to increase the voltage for long distance transmission on power lines before being stepped down for local distribution and use in homes and businesses. Implementing a "smart grid" that uses sensors and two-way communication could help modernize the aging electrical infrastructure to reduce waste and better incorporate renewable energy sources.
This document provides an overview of electricity concepts for 10th grade students. It defines electric current and circuits, potential difference, Ohm's law, factors that affect resistance, and series and parallel resistors. It explains heating effects of electric current and its applications. It also defines electric power, the watt unit of power, and units of electric energy like watt-hours and kilowatt-hours. Key concepts are explained through examples and diagrams. The document aims to comprehensively cover core topics in electricity for 10th grade based on information from textbooks, YouTube, Wikipedia and other sources.
Magnetism arises from the orbital and spin motions of electrons in atoms. There are several types of magnetism depending on how a material responds to an external magnetic field. Diamagnetism is a very weak form where the material opposes the external field. Paramagnetism is slightly stronger, where the material aligns with the field but does not retain magnetization when the field is removed. Ferromagnetism is the strongest form, where the material has permanent magnetic domains that strongly align with an external field and remain when it's removed. Ferromagnetism has subclasses of antiferromagnetism, where magnetic moments oppose each other resulting in no net magnetization, and ferrimagnetism where opposing moments do not
Class 11 important questions for physics Magnetic Effect of Electric CurrentInfomatica Academy
Here you can get Class 11 Important Questions for Physics based on NCERT Textbook for Class XI. Physics Class 11 Important Questions are very helpful to score high marks in board exams. Here we have covered Important Questions on Magnetic Effect of Electric Current for Class 11 Physics subject.
1) Earth itself acts like a giant magnet with a north and south pole that generates a magnetic field extending 50,000 miles into space, allowing compasses to function by pointing towards Earth's magnetic north pole.
2) A compass needle is magnetic and orients itself towards the north-seeking pole of Earth's magnetic field, though it may be affected inside steel buildings or ships due to magnetic attraction between the needle and nearby steel.
3) Magnetic fields surround all magnets and are represented by magnetic lines of force showing the direction and strength of the magnetic force, with lines closest together at the poles where the force is strongest.
Electric charge is a fundamental property of matter that causes objects to attract or repel each other depending on whether their charges are like or unlike. An electric current is formed when charged objects are provided a conducting path for electrons to flow from higher to lower potential, and it is measured in amperes. Electric circuits allow electrons to flow in a path between terminals of a power source, and can be in either series, where components are connected one after another in a single loop passing the same current through each, or parallel, where multiple pathways split the main current across branches.
The document provides information about physics concepts related to magnets, electromagnetism, and nuclear radiation. It discusses the properties of magnetic materials and magnets, induced magnetism, magnetic effects of current, electromagnets, and magnetic force. It also covers electromagnetic induction, generators, transformers, diodes, transistors, logic gates, thermionic emission, and the oscilloscope. Finally, it briefly discusses atoms and the types of nuclear radiation such as alpha particles.
1. Michael Faraday discovered electromagnetic induction in 1831, showing that a changing magnetic field can generate an electric current.
2. An electric motor works by placing a coil of wire between the poles of a magnet. When current passes through the coil, it experiences a force due to the magnetic field and begins to rotate, converting electrical energy to mechanical energy.
3. Key parts of a motor include an insulated copper wire coil, magnet poles to provide a magnetic field, split rings acting as a commutator to reverse current direction, an axle for the coil to rotate around, and brushes connecting the commutator to a current source.
This document discusses the magnetic effects of electricity, including properties of magnets and magnetic fields. Some key points covered include:
- Magnets have north and south poles and magnetic field lines emerge from the north pole and enter the south pole.
- Current-carrying conductors generate magnetic fields according to the right hand rule.
- Changing magnetic fields or moving magnets can induce currents in conductors based on Faraday's law of induction and the right hand rule.
- Devices like motors, generators, and transformers operate based on these electromagnetic principles.
This document provides information about Earth's magnetism and magnetic fields. It explains that Earth's magnetic field is generated by a dynamo effect in the planet's liquid iron core, similar to how a bicycle dynamo works. It also defines key terms related to magnetism, including uniform and non-uniform magnetic fields, magnetic field lines, magnetic poles, dipoles, permeability, and susceptibility. The document discusses how Earth's magnetic field behaves similarly to a bar magnet and protects the planet, while hot temperatures cause metals to lose their magnetic properties.
This document provides an overview of magnetism and magnetic fields. It discusses that magnetism is caused by the motion of charged particles and the strongest force is at the poles. Magnetic fields are represented by lines and form closed loops. Permanent magnets are often made of steel and electrons align to produce magnetic fields. Magnets can lose magnetism through heating, striking, or placing similar poles together. Larger magnets are not necessarily stronger. Maglev trains use magnetic fields for lift, propulsion and guidance.
This document provides an overview of electromagnetism concepts for 10th grade students. It discusses magnetic field lines and their properties, the magnetic field created by current-carrying conductors using the right-hand rule, and the force experienced by conductors in magnetic fields. It also describes electromagnetic induction, the working principles of electric motors and generators, different current types, domestic electric circuits, and safety measures for working with electricity. Real-world applications of these concepts in technologies like MRI machines, trains, and power transmission are also mentioned.
Plane waves reflection refraction and polarization by dinesh.V.rajdineshraj007
This document provides an overview of electromagnetic theory, specifically plane waves, reflection, refraction, and polarization. It discusses key topics such as the properties of plane waves, boundary conditions, reflection and refraction laws, total internal reflection, dispersion, polarization, Brewster's angle, and applications of electromagnetic waves including antennas and optical fibers. The document was a joint effort between Dinesh raj, Rohit, and others to explain these fundamental concepts of electromagnetic theory.
The document discusses various topics related to magnetism including:
- The ancient discovery of magnetism in lodestone by the Chinese in 2000 BC who used it for navigation.
- The properties of magnets including having magnetic fields with poles that attract or repel other magnets and magnetic materials.
- Induced magnetism caused by an external magnetic influence.
- Differences between magnetic, non-magnetic, and magnetized materials and how to test for magnetism.
- Electrical and physical methods of magnetization and demagnetization.
- Plotting magnetic field lines using a compass to map field patterns.
A compass needle is placed under a copper wire carrying an electric current. When current is passed through the wire, the compass needle deflects, showing that the current produces a magnetic field that exerts a force on the compass needle. This demonstrates that electricity and magnetism are linked. The magnetic field produced by a current has concentric circular field lines around the wire. Increasing the current increases the magnetic field strength.
The document discusses electromagnetism induction, which is the production of an electric current from a changing magnetic field. It occurs when there is relative motion between a conductor and magnetic field lines. An induced current is produced when a conductor cuts across magnetic flux lines or when there is a change in the magnetic flux linking a coil. The direction and magnitude of the induced current can be determined by Lenz's law and Faraday's law of induction. Examples of devices that use electromagnetism induction include direct current generators, alternating current generators, and moving coil microphones.
Electromagnetism is a branch of physics involving the study of the electromagnetic force, a type of physical interaction that occurs between electrically charged particles. The electromagnetic force usually exhibits electromagnetic fields such as electric fields, magnetic fields, and light, and is one of the four fundamental interactions (commonly called forces) in nature. The other three fundamental interactions are the strong interaction, the weak interaction, and gravitation.[1] At high energy the weak force and electromagnetic force are unified as a single electroweak force.
Magnetic effects can be produced by electric currents. When a current flows through a conductor, it creates a magnetic field around the conductor. Three key relationships govern magnetic fields: (1) like magnetic poles repel and opposite poles attract, (2) the strength of a magnetic field depends on the amount of current and number of turns in a coil, and (3) changing magnetic fields can induce electric currents in nearby conductors based on Lenz's law. Electromagnets and transformers take advantage of these relationships to manipulate magnetic fields for applications like motors, generators, and power transmission.
Electricity is a form of energy that can be changed into other forms. Electric current is the flow of electrons through a conductor due to a voltage difference provided by a power source like a battery. An electric circuit is a continuous loop or path that allows electric current to flow from the positive terminal of a battery or other power source through components like wires, light bulbs, and back to the negative terminal. Circuits can be arranged in series or parallel configurations, which determine how components are connected and how current and resistance are calculated. Heat is generated by the resistance of components in a circuit as electric current passes through due to the conversion of electrical energy into thermal energy.
Magnetism is considered as one component of electromagnetic forces which refers to physical phenomena arising from the force caused by magnets, objects that create fields that attract or repel other objects.
Very important Chapter of physics because it contains all the important laws needed to understand concepts in physics.
And i hope it will be helpful to you
Magnetic effect of electric current of class 10th.All you need from this chapter is available here.convenient for studying this chapter of class 10 NCERT book.BEST FOR EXAMS!
Most electricity in the US is produced using steam turbines in power plants. Coal is commonly burned to heat water and produce steam, which spins the turbine and generates electricity. This electricity is sent through transformers to increase the voltage for long distance transmission on power lines before being stepped down for local distribution and use in homes and businesses. Implementing a "smart grid" that uses sensors and two-way communication could help modernize the aging electrical infrastructure to reduce waste and better incorporate renewable energy sources.
This document provides an overview of electricity concepts for 10th grade students. It defines electric current and circuits, potential difference, Ohm's law, factors that affect resistance, and series and parallel resistors. It explains heating effects of electric current and its applications. It also defines electric power, the watt unit of power, and units of electric energy like watt-hours and kilowatt-hours. Key concepts are explained through examples and diagrams. The document aims to comprehensively cover core topics in electricity for 10th grade based on information from textbooks, YouTube, Wikipedia and other sources.
Magnetism arises from the orbital and spin motions of electrons in atoms. There are several types of magnetism depending on how a material responds to an external magnetic field. Diamagnetism is a very weak form where the material opposes the external field. Paramagnetism is slightly stronger, where the material aligns with the field but does not retain magnetization when the field is removed. Ferromagnetism is the strongest form, where the material has permanent magnetic domains that strongly align with an external field and remain when it's removed. Ferromagnetism has subclasses of antiferromagnetism, where magnetic moments oppose each other resulting in no net magnetization, and ferrimagnetism where opposing moments do not
Class 11 important questions for physics Magnetic Effect of Electric CurrentInfomatica Academy
Here you can get Class 11 Important Questions for Physics based on NCERT Textbook for Class XI. Physics Class 11 Important Questions are very helpful to score high marks in board exams. Here we have covered Important Questions on Magnetic Effect of Electric Current for Class 11 Physics subject.
1) Earth itself acts like a giant magnet with a north and south pole that generates a magnetic field extending 50,000 miles into space, allowing compasses to function by pointing towards Earth's magnetic north pole.
2) A compass needle is magnetic and orients itself towards the north-seeking pole of Earth's magnetic field, though it may be affected inside steel buildings or ships due to magnetic attraction between the needle and nearby steel.
3) Magnetic fields surround all magnets and are represented by magnetic lines of force showing the direction and strength of the magnetic force, with lines closest together at the poles where the force is strongest.
Electric charge is a fundamental property of matter that causes objects to attract or repel each other depending on whether their charges are like or unlike. An electric current is formed when charged objects are provided a conducting path for electrons to flow from higher to lower potential, and it is measured in amperes. Electric circuits allow electrons to flow in a path between terminals of a power source, and can be in either series, where components are connected one after another in a single loop passing the same current through each, or parallel, where multiple pathways split the main current across branches.
The document provides information about physics concepts related to magnets, electromagnetism, and nuclear radiation. It discusses the properties of magnetic materials and magnets, induced magnetism, magnetic effects of current, electromagnets, and magnetic force. It also covers electromagnetic induction, generators, transformers, diodes, transistors, logic gates, thermionic emission, and the oscilloscope. Finally, it briefly discusses atoms and the types of nuclear radiation such as alpha particles.
1. Michael Faraday discovered electromagnetic induction in 1831, showing that a changing magnetic field can generate an electric current.
2. An electric motor works by placing a coil of wire between the poles of a magnet. When current passes through the coil, it experiences a force due to the magnetic field and begins to rotate, converting electrical energy to mechanical energy.
3. Key parts of a motor include an insulated copper wire coil, magnet poles to provide a magnetic field, split rings acting as a commutator to reverse current direction, an axle for the coil to rotate around, and brushes connecting the commutator to a current source.
This document discusses the magnetic effects of electricity, including properties of magnets and magnetic fields. Some key points covered include:
- Magnets have north and south poles and magnetic field lines emerge from the north pole and enter the south pole.
- Current-carrying conductors generate magnetic fields according to the right hand rule.
- Changing magnetic fields or moving magnets can induce currents in conductors based on Faraday's law of induction and the right hand rule.
- Devices like motors, generators, and transformers operate based on these electromagnetic principles.
Ch-13-Magnetic-effect-of electric -current (2).pptxdeepakd621847
This document provides an overview of the topics to be covered regarding the magnetic effects of electric current. It will discuss: 1) the introduction to magnetic effects, 2) properties of magnets and magnetic fields, 3) magnetic fields created by current-carrying loops and solenoids, 4) electromagnets, 5) forces on conductors in magnetic fields and Fleming's Left Hand Rule, 6) electric motors, 7) electromagnetic induction and Fleming's Right Hand Rule, 8) generators, 9) AC and DC circuits, 10) domestic electric circuits, and 11) questions and answers. The introduction explains that an electric current produces a magnetic field around it, as demonstrated by a compass needle deflecting near a current-
1. The document discusses magnetic properties including field lines and how current carrying conductors and coils produce magnetic fields according to rules like the right hand thumb rule.
2. It also explains how solenoids and closed coils can behave like bar magnets when current flows, and how Fleming's left hand rule describes the force on a current carrying conductor in a magnetic field.
3. Finally, it covers electromagnetic induction, generators, domestic electric circuits, and applications like motors and power generation.
Magnetic Effects of Electric Current
1. Hans Christian Oersted discovered that an electric current produces a magnetic field around it. The direction of the magnetic field depends on the direction of current flow.
2. A straight current-carrying conductor produces concentric circular magnetic field lines around it. A circular loop or solenoid produces parallel magnetic field lines similar to a bar magnet.
3. The magnetic field produced is directly proportional to the current and inversely proportional to the distance from the conductor. It is also affected by the number of turns in a coil.
Ch-13-Magnetic-effect-of electric -current.pptxdeepakd621847
This document provides an overview of topics related to the magnetic effects of electric current. It will cover: 1) an introduction to magnetic effects, 2) properties of magnets and magnetic fields, 3) the magnetic field created by a circular current-carrying loop, 4) solenoids, 5) electromagnets, 6) the force on a current-carrying conductor in a magnetic field and Fleming's left-hand rule, 7) electric motors, 8) electromagnetic induction and Fleming's right-hand rule, 9) generators, 10) alternating and direct current, 11) domestic electric circuits, and 12) questions and answers from NCERT and board papers.
This document outlines the objectives and concepts of electromagnetism. It describes how currents in wires and solenoids produce magnetic fields, and how changing the current or direction of current affects the magnetic field. It also discusses experiments showing the force on current-carrying conductors and charged particles in magnetic fields. Applications of electromagnets such as circuit breakers, motors, and MRI are summarized. The document concludes by comparing direct current and alternating current motors.
The document discusses electromagnetism and various electromagnetic concepts. It begins by explaining that electromagnetism is the phenomenon where electricity creates magnetism. It then discusses how a simple electromagnet works using a battery, wire, and nail. The direction of the magnetic field is determined using the right hand grip rule and Maxwell's screw rule. A solenoid, which is a long coil of wire, is introduced and how its magnetic field is similar to a bar magnet but passes through its axis. Factors affecting magnetic field strength, such as number of turns and current, are covered. The document also discusses force on a current-carrying conductor in a magnetic field using Fleming's left hand rule. It concludes by covering
Magnetic effect of electric current 5.pdfLUXMIKANTGIRI
1. A magnet is a substance that attracts iron and has north and south poles. It creates a magnetic field around it that can be observed using iron filings or a compass.
2. A current-carrying conductor also creates a magnetic field around it. The direction of this field can be determined using the Right Hand Rule.
3. Changing magnetic fields induce electric currents based on Faraday's law of induction. This effect is utilized in generators and transformers.
Electricity and Magnetism विद्युत व चुंबकीय परिणाम.pptxSushant Dhekale
1. A magnet is a substance that attracts iron and has north and south poles. It creates a magnetic field around it with field lines emerging from the north pole and entering the south pole.
2. A current-carrying conductor also creates a magnetic field around it, with concentric circular field lines. The direction of the field is given by the right hand rule.
3. When a conductor carrying a current is placed in a magnetic field, it experiences a force whose direction is given by Fleming's left hand rule. This force can be used to create electromagnets and electric motors.
1. A magnet is a substance that attracts iron and has north and south poles. Magnets have a magnetic field that emerges from the north pole and enters the south pole.
2. A current-carrying conductor has a magnetic field around it that forms concentric circles. The direction of the magnetic field is given by the right hand rule.
3. When the direction of current changes in a coil of wire, it induces a current in a nearby coil due to electromagnetic induction. The direction of induced current follows Fleming's right hand rule.
a) Magnetic field :-
The region around a magnet where the force of attraction or repulsion can be detected is called magnetic field.
Magnetic field around a magnet can be detected by using a magnetic compass.
1. The document discusses electromagnetic induction and various concepts related to electricity including magnetic fields, electric current, induction, and circuits.
2. It explains how magnetic fields are produced by magnets and electric currents, and how changing magnetic fields can induce electric currents based on Fleming's rules.
3. Key aspects of domestic electric circuits are outlined, including how homes receive alternating current which is then distributed to circuits protected by fuses from overloading and short circuits.
The document discusses the magnetic effects of electric current, including Oersted's experiment showing a current-carrying wire deflecting a compass needle. It introduces rules for determining magnetic field direction, such as Ampere's swimming rule and Maxwell's corkscrew rule. Magnetic field is demonstrated using iron filings and its properties are described. Various configurations for producing magnetic fields are examined, such as straight conductors, coils, and solenoids. The relationships between magnetic fields, electric currents, and forces are explored through Fleming's rules. Faraday's experiments and laws of induction are summarized. Finally, the workings of an alternating current generator are outlined.
Magnetic effects of current class 10 th revisedDeepali Sharma
1) When current passes through a wire, it produces a magnetic field that can be detected using a compass. The compass needle will deflect due to the magnetic field produced by the current-carrying wire.
2) The direction of the magnetic field produced around a current-carrying straight wire can be determined using the right-hand rule. Reversing the current reverses the direction of the magnetic field.
3) A current-carrying circular loop produces concentric circular magnetic field lines, with the field lines becoming straight and perpendicular to the plane of the coil at the center.
The document discusses the magnetic effects of electric current. It describes how magnetic fields are produced by currents and magnets. The key points covered include:
- Magnetic field lines emerge from the north pole of a magnet and enter the south pole. A current carrying conductor produces concentric circular magnetic field lines based on the right hand rule.
- Changing magnetic fields or moving conductors through magnetic fields induce currents based on Fleming's rules.
- Direct current flows in one direction while alternating current reverses direction periodically at fixed frequencies like 50 Hz for power grids.
- Electric circuits use fuses to protect from overloading and short circuits which can damage wiring and devices.
This document provides an overview of electromagnetism and key concepts in physics such as magnetic fields, magnetic flux density, magnetic forces, electromagnetic induction, and Faraday's and Lenz's laws. It discusses how current-carrying wires and coils produce magnetic fields and how changing magnetic fields can induce electromotive force (EMF) in conductors. Examples of applications of electromagnetic induction include electric motors, generators, tape recorders, ATMs, and induction stoves. Multiple choice questions related to these topics are also provided.
This document discusses various concepts related to electromagnetism including:
- The magnetic field produced by a current-carrying conductor and how its direction depends on the current direction.
- The right hand grip rule for determining magnetic field direction.
- How the strength of the magnetic field depends on current magnitude and distance from the wire.
- Magnetic field patterns around flat coils and solenoids, and how their fields can be increased.
- Forces experienced by current-carrying conductors in magnetic fields according to Fleming's left hand rule.
file_1644296450_ppt on magnetic effect of electric currenrt-converted (wecomp...HariHaraSudhan G
1. A magnetic field is produced around any conductor carrying an electric current. The direction of the magnetic field can be determined using the right hand rule.
2. When a current carrying conductor is placed in a magnetic field, it experiences a force. The direction of this force can be found using the left hand rule.
3. Any change in a magnetic field, such as moving a magnet or changing the current in a coil, induces an electric current in a nearby conductor. The direction of this induced current is given by the right hand rule.
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Magnetic Effects of Electric Current for Grade 10th Students
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Chapter 13 Magnetic Effects of Electric Current
n this chapter, we will study the effects of electric current : Moving charges or electric
current generates a magnetic field.
1. Hans Christian Oersted (1777-1851)
Oersted showed that electricity and magnetism are related to each other.His research later
used in radio, television etc.
The unit of magnetic field strength is named Oersted in his honour.
2. Oersted Experiment
On passing the current through the copper wire XY in the circuit, the compass needle
which is placed near the conductor gets deflected. If we reverse the direction of current,
the compass needle deflect in reverse direction. If we stop the flow of current, the needle
comes at rest.
Hence, it can be concluded that electricity and magnetism are linked to each other. It
shows that whenever the current will flow through the conductor,then a magnetic field will
develop.
3. Magnetic Field: It is the region surrounding a magnet, in which force of magnet can be
detected. It is a vector quantity, having both direction& magnitude.
4. Compass Needle: It is a small bar magnet, whose north end is pointing towards north
pole and south end is pointing towards south pole of earth.
5. Magnetic Field Lines: The tangent to the magnetic field line at a point gives the
direction of magnetic field at that point.
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Hence, magnetic field line is a path along which a hypothetical free north pole tend to
move towards south pole.
6. Characteristics of Magnetic field lines:
(a) The direction of magnetic field lines outside the magnet is always from north pole to
south pole of bar magnet and are indicated by an arrow.Inside the magnet, the direction of
field lines is from its south pole to north pole. Thus magnetic field lines are closed curves.
(b) The strength of magnetic field is expressed by the closeness of magnetic field lines.
Closer the lines, more will be the strength and farther the lines, less will be the magnetic
field strength.
(c) No two field lines will intersect each other.If they intersects, then at point of
intersection the compass needle will show two directions of magnetic field which is not
possible.
7. Magnetic field due to Current Carrying Conductor
The above electric circuit in which a copper wire is placed parallel to a compass needle,
shows the deflection in needle gets reversed, when the direction of current reversed.
Hence electricity and magnetism are related to each other.
8. Right Hand Thumb Rule
It is a convenient way of finding the direction of magnetic field associated with current
carrying conductor. Hold the straight wire carrying current in your right hand such that
thumb points towards the direction of current, then your folded fingers around the
conductor will show the direction of magnetic field.
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This rule also called Maxwell’s corkscrew rule.
9. Magnetic Field due to Current through a Straight Conductor
Let a current carrying conductor be suspended vertically and the electric current is flowing
from south to north. In this case, the direction of magnetic field will be anticlockwise. If the
current is flowing from north to south, the direction of magnetic field will be clockwise.
A current carrying straight conductor has magnetic field in the form of concentric circles;
around it. Magnetic field of current carrying straight conductor can be shown by magnetic
field lines.
10. Magnetic Field due to Current through a circular Loop
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Every point on the wire carrying current give rise to the magnetic field,appearing as a
straight line at the centre of loop. By applying Right hand Thumb rule, we can find the
direction of magnetic field at every section of the wire.
11. Solenoid :A Coil of many circular turns of insulated copper wire wrapped closely in the
shape of a cylinder is called solenoid.
12. Magnetic field due to a current in a solenoid :
Using R.H. Thumb Rule, we can draw the pattern of magnetic field lines around a current
carrying ‘Solenoid’.
•One end of the solenoid behaves as a magnetic north pole,while the other end behave as
the South Pole.
•The filed lines inside the solenoid are in form of parallel straight lines, that implies that
magnetic field inside the solenoid is same at all points i.e. Field is uniform.
The strength of the magnetic field produced depends upon
(a) the number of turns
(b) Strength of current in the solenoid used in making solenoid.
13. Electromagnet: Strong magnetic field inside the solenoid can be used to magnetise a
magnetic material for example soft iron, when it is placed inside the coil. The magnet so
formed is called electromagnet.It is a temporary magnet.
Properties of Magnetic Field:
•The magnitude; of magnetic field increases with increase in electric current and decreases
with decrease in electric current.
•The magnitude of magnetic field; produced by electric current; decreases with increase in
distance and vice-versa. The size of concentric circles of magnetic field lines increases with
distance from the conductor, which shows that magnetic field decreases with distance.
•Magnetic field lines are always parallel to each other.
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•No two field lines cross each other.
14. Force on a current carrying conductor in a magnetic field.
Andre Marie Ampere (1775–1836) suggested that the magnet also exert an equal and
opposite force on the current carrying conductor.
We will observe that the rod will displace i.e. the rod will experience a force, when it is
placed in magnetic field, in a perpendicular direction to its length.
•The direction of the exerted force will be reversed if the direction of current through the
conductor is reversed.
•If we change the direction of field by inter changing the two poles of the magnet, again
the direction of exert force will change.
•Therefore the direction of exerted force depends on
(a) direction of current
(b) direction of magnetic field lines.
15. Left Hand fleming Rule
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According to this rule, stretch thumb, forefinger, and middle finger of your left hand
such that they are mutually perpendicular to each other.
If fore finger represent direction of magnetic field & middle finger represent direction of
current,then thumb will point in the direction of motion or force acting on the conductor.
ELECTRIC MOTOR :
Electrical energy is converted into mechanical energy by using an electric motor. Electric
motor works on the basis of rule suggested by Marie Ampere and Fleming’s Left Hand
Rule.
In an electric motor, a rectangular coil is suspended between the two poles of a magnetic
field. The electric supply to the coil is connected with a commutator. Commutator is a
device which reverses the direction of flow of electric current through a circuit.
When electric current is supplied to the coil of electric motor, it gets deflected because of
magnetic field. As it reaches the half way, the split ring which acts as commutator reverses
the direction of flow of electric current. Reversal of direction of current reverses the
direction of forces acting on the coil. The change in direction of force pushes the coil; and
it moves another half turn. Thus, the coil completes one rotation around the axle.
Continuation of this process keeps the motor in rotation.
In commercial motor, electromagnet; instead of permanent magnet; and armature is used.
Armature is a soft iron core with large number of conducting wire turns over it. Large
number of turns of conducting wire enhances the magnetic field produced by armature.
16. Michael Faraday: Gave the law of Electro magnetic Induction : When a conductor
is set to move inside a magnetic field or a magnetic field is set to be changing around a
conductor, electric current is induced in the conductor.
17. Galvanometer: It is an instrument that can detect the presence of a current in a
circuit. If pointer is at zero (the centre of scale) then there will be no flow of current.
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If the pointer deflect on either side right or left, this will show the direction of current.
Represented by
ELECTRIC GENERATOR :
The structure of electric generator is similar to that of an electric motor. In case of an
electric generator a rectangular armature is placed within the magnetic field of a
permanent magnet. The armature is attached to wire and is positioned in way that it can
move around an axle.
When the armature moves within the magnetic field an electric current is induced. The
direction of induced current changes, when the armature crosses the halfway mark of its
rotation. Thus, the direction of current changes once in every rotation. Due to this, the
electric generator usually produces alternate current, i.e. AC. To convert an AC generator
into a DC generator, a split ring commutator is used. This helps in producing direct current.
18. Electromagnetic Induction: Can be explained by two experiments
(a) First Experiment “Self Induction”
In this experiment, when the north pole of bar magnet is brought closer to the coil or away
from the coil, we see momentary deflection in the needle of galvanometer on either side of
null point. First right and then left.
Similarly, if we keep the magnet stationary and coil is made to move towards or away from
the north pole of magnet. Again we will observe deflection in the needle of galvanometer.
If both bar magnet and coil are kept stationary, there will be no deflection in galvanometer.
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This experiment can also be done with the south pole of magnet, we will observe the
deflection in galvanometer, but it would be in opposite direction to the previous case.
It concludes that motion of magnet with respect to coil or vice-versa, changes the
magnetic field. Due to this change in magnetic field lines, potential difference is induced in
the same coil, which set up an induced current in the circuit.
(b) Second Experiment : Mutual Induction
In this experiment plug in the key that connects coil with battery and observe the
deflection in galvanometer. Now plug out the key that disconnect the coil-1 from battery
and observe the deflection in galvanometer, which will be in reverse direction.
Hence, we conclude that potential difference is induced in secondary coil (coil-2),
whenever there is a change in current, in primary coil(coil-1) (by on and off of key).
This is because, whenever there is change in current in primary coil
ꜜ
Magnetic field associated with it also changes
ꜜ
Now, magnetic field lines around the secondary coil (coil-2) will change and induces the electric
current in it (observed by the deflection of needle of Galvanometer in secondary circuit)
This process, by which changing of strength of current in primary coil, induces a current in
secondary coil is called Electromagnetic Induction”
The induced current is found to be highest when the direction of motion of coil is at right
angles to the magnetic field.
19. Fleming’s Right Hand Rule
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Rule can be defined as :
Stretch, thumb, forefinger, and middle finger of right hand, so that they are perpendicular
to each other. The forefinger indicates direction of magnetic field, thumb shows the
direction of motion of conductor, then the middle finger will shows the direction of
induced current.
Electrical generator is based on the principle of electromagnetic induction. It convert
mechanical energy into electrical energy.
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21. Advantages of Alternate Current (AC) over Direct Current (DC)
Electric power can be transmitted to longer distances without much loss of energy.
Therefore cost of transmission is low.
In India the frequency of AC is 50Hz. It means after every 1/100 second it changes its
direction.
22. Domestic Electric Circuits :
In our homes, the electric power supplied is of potential difference V = 220V and frequency
50Hz.
It consist of three wires :–
(1) Wire with red insulation cover – LIVE WIRE (POSITIVE) Live wire is at high potential of
220V
(2) Wire with black insulation cover – NEUTRAL WIRE(NEGATIVE) Neutral wire is at zero
potential Therefore, the potential difference between the two is 220V.
(3) Wire with Green insulation cover – EARTH WIRE
It is connected to a copper plate deep in the earth near house.
The metallic body of the appliances is connected with the earth wire as a safety measure.
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Earth wire provide a low resistance to the current hence any leakage of current to the
metallic body of the appliances, keep its potential equal to that of earth. That means zero
potential and the user is saved from severe electric shock.
Point to be noted in Domestic Circuit
(a) Each appliance has a separate switch of ON/OFF
(b) In order to provide equal potential difference to each appliance, they should be
connected parallel to each other. So that they can be operated at any time.
24.Short Circuiting
Due to fault in the appliances or damage in the insulation of two wires, the circuit will offer
zero or negligible resistance to the flow of current. Due to low resistance, large amount of
current will flow.
According to Joule’s law of heating effect , heat is produced in live wire and produces
spark, damaging the device and wiring.
25. Overloading
Overloading can be caused by (1) Connecting too many appliances to a single socket or (2)
accidental rise in supply voltage if the total current drawn by the appliances at a particular
time exceeds the bearing capacity of that wire, it will get heated up. This is known as
overloading. Fuse a safety device can prevent the circuit from overloading and short
circuiting.
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