Ee40 final 1
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- An inductor opposes changes in current by storing energy in a magnetic field. It consists of a coil of wire and its ability to store energy is called inductance. - Inductance depends on the number of turns in the coil, the diameter of the coil, and the length of the coil. It is measured in henrys. - For inductors in series, the total inductance is the sum of the individual inductances. For inductors in parallel, the total inductance is calculated using the individual inductances and mutual inductance. - Mutual inductance describes the interaction between coils and is considered when coils are in series or parallel. It affects the net inductance based on whether the
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Inductance of an inductor
1) The inductance of a coil depends on permeability, cross-sectional area, number of turns, and length. It is represented by the formula L = μ0 μr A N2/l.
2) Mutual inductance occurs between two coils that are in close proximity, and is represented by the formula M = μ0 μr AN1 N2/l.
3) An inductor offers inductive reactance XL to an alternating current, which increases with frequency and inductance based on the formula XL = 2πfL.
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1) Electrical charge is an electrical property of matter that exists due to an excess or deficiency of electrons. Voltage is the driving force in electric circuits and establishes current. Current is the flow of electric charge and is determined by the number of electrons that flow past a point per unit time.
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3) The kilowatt-hour (kWh) is a common unit used to measure electrical energy on utility bills and represents the energy used when power of 1 kil
Electromagnetic induction
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An electric current is the flow of electric charge through a conductor. It is measured using an ammeter. An electric circuit uses components like batteries and wires to provide a path for current to flow.
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This document contains examples of calculating electromagnetic induction in coils and coupled inductors. It provides the formulas and steps to calculate:
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This document discusses electromagnetic induction and self-induced electromotive force (EMF). It defines electromagnetic induction as the phenomenon of producing an EMF and current in a conductor when the magnetic flux through the conductor changes. An EMF can be induced dynamically via motion in a magnetic field, or statically if the field changes while the conductor is stationary. Self-induced EMF occurs when the current in a coil changes, altering the coil's self-generated magnetic flux and inducing an opposing EMF according to Lenz's law. The magnitude of self-induced EMF is equal to the negative of the rate of change of flux linkage over time. The coefficient of self-inductance L quantifies a coil's ability to
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Inductance of an inductor
1) The inductance of a coil depends on permeability, cross-sectional area, number of turns, and length. It is represented by the formula L = μ0 μr A N2/l.
2) Mutual inductance occurs between two coils that are in close proximity, and is represented by the formula M = μ0 μr AN1 N2/l.
3) An inductor offers inductive reactance XL to an alternating current, which increases with frequency and inductance based on the formula XL = 2πfL.
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Electric charge is a fundamental property of matter that causes objects to experience a force when near other charged objects. There are two types of charges: positive and negative.
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An electric current is the flow of electric charge through a conductor. It is measured using an ammeter. An electric circuit uses components like batteries and wires to provide a path for current to flow.
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in contains I,V,P,Energy,Resistor, Inductor,Capacitor & source of electricle energy.
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suggested by:
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in contains I,V,P,Energy,Resistor, Inductor,Capacitor & source of electricle energy.
made by:
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suggested by:
ma'm Supraja Giddaluru,
gandhinagar institute of technology
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Similar to Ee40 final 1
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1. Self induction is the phenomenon where an induced electromotive force (emf) is generated in a circuit or coil due to a change in the current flowing through it.
2. The property of a coil that enables it to produce an opposing induced emf when the current changes is called self induction.
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Inductance is a property of circuits that causes a back emf opposing any change in current. When the current in a circuit changes, it produces a magnetic field that induces an emf to oppose the change. Circuits containing inductors and resistors reach their final current values exponentially over time due to this back emf. Energy is also stored in the magnetic field of an inductor when current flows through it. Mutual inductance describes the interaction between currents in two different coils and can induce emfs in each other as well. In an LC circuit with no resistance, the current and charge oscillate indefinitely between the inductor and capacitor as energy transfers between their electric and magnetic fields.
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Mutual inductance occurs when the magnetic flux produced by one coil links with another nearby coil. This induces a voltage in the second coil. Transformers use this principle, with the primary coil producing flux that links with the secondary coil. The coils have a property called mutual inductance M. Depending on whether the flux from each coil aids or opposes the other, M can either add to or subtract from the total inductance. Mutual inductance allows induction of a voltage across one coil through a changing current in the other.
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Static electricity is caused by an imbalance of electrons between two objects. Rubbing certain materials together, like fur and ebonite, can cause this imbalance as electrons are transferred. Conductors allow electrons to flow freely, while insulators impede electron flow. Static electricity has many uses, like in photocopiers, but can also be dangerous in situations like lightning or refueling. Electric current is the flow of electrons through a material over time. Resistance opposes this flow. Circuits use components like resistors, capacitors, and switches to control current. Electricity powers many appliances and lights in homes. Safety devices like fuses and circuit breakers help prevent overloads.
Inductance.pptx
- Inductance is a measure of how much a loop of wire resists changes in current and is measured in henrys. The self-induced emf in a loop is proportional to the negative time derivative of the current.
- The inductance of a coil depends on the number of turns and the magnetic flux through the coil. It also depends on the geometry, for example a solenoid's inductance increases with its length and cross-sectional area.
- In an RL circuit, the current decays exponentially over time according to the circuit's time constant, which equals the inductance divided by the resistance. Energy is stored in the magnetic field of an inductor proportional to the square of the current.
Lec. 1 basics
1) Electrical charge is an electrical property of matter that exists due to an excess or deficiency of electrons. Voltage is the driving force in electric circuits and establishes current. Current is the flow of electric charge and is determined by the number of electrons that flow past a point per unit time.
2) Resistance opposes the flow of current. When current flows through a resistor, electrical energy is converted to heat or other forms of energy. Power is the rate at which energy is used and is calculated by multiplying voltage by current.
3) The kilowatt-hour (kWh) is a common unit used to measure electrical energy usage and costs. Utility companies charge customers based on the number of kWh consumed
Description of Electronics components
Resistance opposes current flow and is measured in ohms. A capacitor stores electric charge when a voltage is applied and releases it when needed, with its capacitance measured in farads. An inductor stores energy in a magnetic field when current flows through it, with its inductance measured in henrys. Basic components like resistors, capacitors, and inductors can be combined in series or parallel configurations, with the total resistance, capacitance, or inductance calculated differently depending on the configuration.
Mesh and nodal
This document provides information on different electrical concepts including:
- Voltage, current, and resistance definitions.
- Electric power formula using voltage, current, energy, and time.
- Active and passive electronic components and their definitions.
- Ohm's law relating voltage, current, and resistance.
- Current and voltage division rules for circuits with parallel and series resistors.
- Ideal and non-ideal voltage and current sources and their characteristics.
- Examples of calculations using the concepts covered.
adaindiv1
The document discusses optimizing wireless power transfer through resonant inductive coupling. It begins with an abstract discussing using a combination of inductive and resonant frequency techniques to improve power transfer efficiency. The introduction discusses how wireless power transfer can solve issues with wired charging. It then covers the theory of electromagnetic induction and inductive coupling. Key aspects discussed include inductance, mutual inductance, resonant frequency, and designing resonant inductive coupling systems using air core coils. Simulation results showed resonant inductive technique is more efficient than basic inductive power transfer.
Inductor
The document discusses different topics related to inductance including:
1) Self-inductance is defined as the ratio of the total flux linkage to the current through a solenoid or coil.
2) The flux density of a toroid coil is proportional to the current through it and inversely proportional to its radius.
3) Mutual inductance is defined as the ability of one coil to produce an emf in a nearby coil when the current in the first coil changes, and is proportional to the flux from the first coil that is coupled to the second coil.
Electricity, types of charges, current, circuits
There are two types of electric charges: positive charges consist of protons and negative charges consist of electrons. The standard unit of charge is the coulomb. Conductors are substances that allow electric current to flow through them because they contain free or loosely bound electrons. Insulators do not allow electric current because they lack free electrons. Ohm's law defines the relationship between voltage, current, and resistance in a circuit. Power in a circuit is calculated as the product of current and voltage or the product of voltage squared and resistance.
Inductors
KTU syllabus EST 130 first year electronics engineering
includes inductor colour coding.
https://youtu.be/iwj2K5XXhNw
electricity bacos concept1774866958.pptx
The document discusses the basics of electricity including:
- Electrons flow through an atom's nucleus in orbits and electricity is the flow of electrons from atom to atom in a conductor.
- Current or amperage refers to the electrical flow in a circuit and is measured in amps. Resistance opposes the flow of current and is measured in ohms.
- There are two types of current - direct current (DC) which flows in one direction, and alternating current (AC) which flows back and forth as the polarity alternates.
- Transformers use changing magnetic fields to induce voltage in another coil and allow voltage conversion but cannot be used with direct current which produces a static magnetic field.
CIRCUIT AND NETWORK THEORY
This document discusses circuit and network theory. It covers topics such as circuit elements and laws, magnetic circuits, network analysis, network theorems, AC circuits and resonance, coupled circuits, transients, two-port networks, and filters. Mesh analysis is introduced as a technique for network analysis that is applicable to planar networks containing voltage sources. The key steps are selecting mesh currents, then writing and solving KVL equations in terms of the unknown currents.
хагас дамжуулагчийн физик
Semiconductor theory describes how small amounts of impurities can be added to intrinsic semiconductors to create n-type and p-type materials. N-type semiconductors are created by adding elements with extra electrons, while p-type are created by adding elements with electron deficiencies. The junction between a p-type and n-type material allows current to flow in only one direction, forming the basis for important semiconductor devices such as diodes, transistors, and solar cells.
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Ee40 final 1
- 2. Inductor OPPOSE THE FLOW OF AC BY temporarily storing some of the electrical energy as a magnetic field. Consist of wire coils.
- 3. Inductance The ability of the wire coil or loop to store energy. abbreviated by the letter L
- 4. Inductance is directly proportional to the number of turns of wire. is also directly proportional to the diameter of the coil. the longer the coil, the less the inductance 𝛍o 𝛍r AN2 𝓵 L = A = cross sectional area N = no. of turns 𝓵 = length of coil
- 5. Unit of Inductance henry, abbreviated H, represents a potential difference of one volt across an inductor within which the current is increasing or decreasing at one ampere per second.
- 6. Inductor in series Without interaction L = L1 + L2 + L3
- 7. Inductor in Parallel L L1 L2 L3 1 1 1 1 = + +
- 8. Coefficient of coupling specified by the letter k, is a number ranging from 0 (no coupling) to 1 (maximum possible coupling). Two coils that are separated by a sheet of solid iron would have essentially k = 0 two coils wound on the same form, one right over the other, would have practically k = 1.
- 9. Mutual inductance is specified by the letter M is expressed in the same units as inductance:
- 10. Effects of mutual inductance When two inductors are connected in series, and there is reinforcing/aiding mutual inductance between them.
- 11. Effects of mutual inductance When two inductors are connected in series, and there is opposing mutual inductance between them.
- 12. Effects of mutual inductance When two inductors are connected in parallel, and there is reinforcing/aiding mutual inductance between them. L1L2 - M2 L1 + L2 - 2M L =
- 13. Effects of mutual inductance When two inductors are connected in parallel, and there is opposing mutual inductance between them. L1L2 - M2 L1 + L2 + 2M L =
- 14. Energy stored in the inductor I2L 2 W = Joules
- 15. Example 1 a. Find L if L1 and L2 are reinforcing. b. Find L if L1 and L2 are opposing.
- 16. Example 2 There are two coils with values L1 = 835 μH and L2 = 2.44 mH. They are connected in series so that their coefficient of coupling is 0.922, acting so that the coils oppose each other. What is the net inductance of the pair?