Electricity and magnetism
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The document defines key electrical terms like appliance, conductor, fuse box, insulator, magnet, plug, socket, and switch. It also lists common electrical devices found at home like cables, plug, socket, switch, electricity meter, and fuse box. Materials are classified as conductors that allow electricity to flow, like iron, copper and aluminum, or insulators that do not conduct electricity, such as rubber, plastic, cloth and glass.
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This document defines key vocabulary terms related to electricity and magnetism, including appliance, conductor, fuse box, insulator, magnet, plug, socket, and switch. An appliance is something used in the kitchen that requires electricity to operate. A conductor allows electricity to flow through it, while an insulator does not. A fuse box interrupts electric circuits with too high of a current. A magnet attracts magnetic materials. A plug temporarily connects devices to electricity, and a socket is where devices connect to a wall. A switch is used to turn lights on and off.
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This document provides an overview of electricity and magnetism. It discusses how electricity is the flow of electrons from areas of high potential to low potential. Circuits allow electricity to flow in an organized way from the positive end of a battery to the negative end. While direct current (DC) flows in one direction, alternating current (AC) switches direction periodically and is used to power appliances plugged into wall outlets. Magnets work due to their magnetic fields produced by protons and electrons aligned within the material. Electromagnets can be turned on and off using a battery to control the magnetic field. The document concludes with noting various sources of electricity like hydroelectric dams and wind turbines.
Electricity
Static electricity refers to the buildup of electric charge on the surface of objects and can be contrasted with current electricity which is delivered through wires. There are 5 types of electric discharge that can occur. Static electricity can be dangerous in places like operating theaters, around computers, and when refueling if flammable vapors are present as sparks from static discharges can ignite them. Current is the flow of electric charge through a medium like a wire and is measured in amperes. Potential difference refers to the difference in electric potential between two points in an electric field and is measured in volts. Capacitors are electrical components that store energy in an electric field and are measured in farads.
Electricity
Static electricity refers to the buildup of electric charge on the surface of objects and can be contrasted with current electricity which is delivered through wires. There are 5 types of electric discharge that can occur. Static electricity can be dangerous in places like operating theaters, around computers, and when refueling if flammable vapors are present as sparks from static discharges can ignite them. Current is the flow of electric charge through a medium like a wire and is measured in amperes. Potential difference refers to the difference in electric potential between two points in an electric field and is measured in volts. Capacitors are electrical components that store energy in an electric field and are measured in farads.
Unit d electrical principals & technologies notes
This document provides information about electrical principles and technologies. It begins with demonstrations of static electricity using balloons and explains that static electricity is a buildup of electrons on a surface that are not moving. It then discusses electrical charge and how objects can become positively or negatively charged. Electrical discharge occurs when a buildup of electrons moves between objects. A Van de Graaff generator is described as a device that builds up static charge. The document also covers electrical currents, circuits, voltage, and electrical safety. It explains cells and batteries as devices that convert chemical into electrical energy. Resistors, insulators, conductors, and a water model analogy are also discussed.
Wring a plug
Brown wire is live, blue is neutral, and green/yellow is earth. The earth wire protects users from electric shock by providing a path for current to flow if the live wire touches exposed metal. Double insulated appliances do not need an earth wire because their metal parts are covered with insulating plastic.
Current Electricity
The document discusses different types of electricity including static electricity, where charges move randomly for a short time, and current electricity, where there is a steady flow of electric charge through a conductor. It also discusses the key components that allow electricity to flow, such as batteries, which provide a source of electrical energy through chemical reactions in electrochemical cells. The document also covers concepts like potential energy, voltage, current, resistance, and the factors that affect resistance.
Electrical_and electronics fundamentalss
This document discusses basic electrical principles and wiring safety. It covers the fundamentals of electricity, including current, voltage, power and resistance. It also explains Ohm's Law. Key safety topics include avoiding shocks, proper fuse/breaker sizing, and keeping appliances dry. The document outlines electrical system components from the power source, to the service entrance, electrical panel, branch circuits and wire types. Proper wire sizing and identification is also covered.
Elec Mag%20grade1 1
Electricity and Magnetism is a lesson introducing students to concepts like static electricity, electric circuits, electromagnetism, and more. It defines key terms like electricity, static electricity, voltage, current, conductors and insulators. Students learn that rubbing objects can cause a transfer of electrons leading to static charges. The relationship between electricity and magnetism is explored through electromagnets, generators, motors and electromagnetic induction. Direct current from batteries is contrasted with alternating current from generators that switches direction periodically.
Electromagnetism, electricity and digital electronics
This document provides an outline for a course on electromagnetism, electricity, and digital electronics. It covers topics such as the theory of electrons and electricity, resistors, Ohm's law, electric circuits, the theory of magnetism, diodes, logic gates, and flip-flops. It lists several textbooks that will be used as references. It then delves into some of the topics in more detail, including the structure of atoms, types of insulators and conductors, direct and alternating current, voltage, current, resistance, and Ohm's law. It also discusses magnetism, electromagnetism, and provides examples of devices that use magnets.
Components used in electrical installations
This document discusses various electrical components used in installations including conductors, cables, flex, trunking, conduit, plugs, sockets, switches, isolators, junction boxes, and timers. It provides details on appropriate cable sizes for different applications, safe installation practices, and the relationships between voltage, current, resistance, wattage, and fuse sizes.
1. Resistors .pptx
This document provides an overview of passive electronic components, focusing on different types of resistors. It defines passive components as those that do not require an external power source to operate, such as resistors, capacitors, and inductors, distinguishing them from active components like transistors that do require an external power source. The document then describes various types of resistors in detail, including fixed resistors like carbon composition, wire wound, and carbon/metal film, as well as variable resistors like potentiometers and rheostats. It explains their constructions, characteristics, applications, and how resistors are used to control current and voltage in electronic circuits.
L-3-4 Introduction to electroceramics.pptx
This document provides an introduction to electroceramics. It discusses that electroceramics are ceramic materials formulated for specific electrical, magnetic, or optical properties. Their properties can be tailored for uses as insulators, capacitors, sensors, actuators, and more. Common applications of electroceramics include capacitors, resistors, filters, transducers, and components in devices like cellular phones. Ferroelectric and piezoelectric ceramics are important classes of electroceramics used in applications such as ultrasonic motors and medical imaging devices due to their electric and structural responses to external stimuli. Magnetic ceramics also have applications as components in devices like transformers.
Aisuphysics
This document provides an outline and overview for a course on fundamentals of electricity and electronics. The course covers topics such as basic electrical terms, circuits, instruments, materials, and safety. It includes sections on topics like fundamentals, basic circuits, motors/generators, advanced circuits, electronic communication systems, and labs/projects. Safety is emphasized throughout, including proper use of tools and protective equipment when working with electrical systems.
How electricity works
Electricity works through the movement of electrons in conductors like wires and cables. Atoms contain protons with a positive charge and electrons with a negative charge that orbit the nucleus. In conductors, some electrons are loosely bound and can flow freely. When a closed circuit is formed connecting a voltage source, such as a battery, the voltage pushes the electrons to flow in one direction. Electrical components like resistors can control or use this electron flow to perform tasks. Transformers can induce electron flow between two circuits to change voltage levels. Alternating current periodically changes direction while direct current flows one way.
NS2 5.3 Basic Electricity
The document discusses the basic principles of electricity, including how voltage is generated through various means such as friction, pressure, heat, light, chemical reactions, and magnetism. It also covers electrical components like conductors, insulators, batteries, circuits, and formulas such as Ohm's Law. The relationships between voltage, current, resistance, and power in electrical circuits are explained.
Dielectric Material, Properties & Applications
A capacitor consists of two conductive plates separated by an insulating material. When a voltage is applied, opposite charges accumulate on each plate. The ability of a capacitor to store charge is known as capacitance. Capacitance depends on the plate area, distance between plates, and the dielectric material's permittivity. Dielectric materials with higher permittivity increase a capacitor's charge storage ability. Common dielectric materials include mica, ceramics, and polymers. Some materials exhibit piezoelectricity or ferroelectricity based on their polarization response to electric fields.
Physics 31 - Dangers of electricity.pptx
This document discusses the dangers of electricity in homes. It states that damaged insulation, overheating cables, and damp conditions pose fire and electrocution hazards. Fuses and circuit breakers are used to protect circuits from high currents by interrupting the flow. Fuses contain a wire that melts when overheated, while circuit breakers automatically trip the current. Proper fuse or circuit breaker ratings should be selected based on an appliance's power and voltage ratings to prevent overheating without blowing the fuse. Earthing metal appliance cases prevents electric shock if a fault occurs.
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Electricity and magnetism
- 1. Appliance Something you use in the kitchen . It needs electricity to work
- 2. Conductor This substance allows electricity to travel through .
- 3. Fuse box This interrupts an electric circuit if current is too high .
- 4. Insulator This substance does not allow electricity to flow through it
- 5. Magnet This small object attracts magnetic materials
- 6. Plug This temporaly connect electric devices to the current.
- 8. Switch You use it to turn light on or off.
- 9. Electricity and magnetismMagnets Magnetic field Magnetic poles Electric circuits Series circuit Parallel circuit atom Protons Neutrons Electrons Positive charge No charge Negative charge Materials Electricity at home Conductors Insulator Iron copper aluminium water Rubber plastic cloth glass Cables plug socket switch electricity meter fuse box
- 10. Electricity and magnetismMagnets Magnetic field Magnetic poles Electric circuits Series circuit Parallel circuit atom Protons Neutrons Electrons Positive charge No charge Negative charge Materials Electricity at home Conductors Insulator Iron copper aluminium water Rubber plastic cloth glass Cables plug socket switch electricity meter fuse box