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Flashcards on Electromagnetic Induction
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What is electromagnetic induction?
The production of an electromotive force in a circuit by a changing magnetic field.
What is Faraday's law of electromagnetic induction?
The induced electromotive force in a circuit is directly proportional to the rate of change of magnetic flux through the circuit.
What is Lenz's law?
The direction of an induced current is always such that it opposes the magnetic field that produces it.
What is self-induction?
The production of an electromotive force in a circuit due to a change in the current in the same circuit.
What is mutual induction?
The induction of an electromotive force in a circuit due to a change in the current in a neighboring circuit.
What is an induced current?
A current that flows in a conductor due to a changing magnetic field.
What is an induced voltage?
A voltage produced in a coil or circuit due to a changing magnetic field.
What is magnetic flux?
The measure of the quantity of magnetic field passing through a given area.
What are the factors affecting the magnitude of induced voltage?
Number of loops, strength of magnetic field, and rate of change of magnetic field.
How can electromagnetic induction be demonstrated?
Using a coil, magnet, and galvanometer to show the generation of an induced current.
What are some applications of electromagnetic induction?
Generators, transformers, induction cookers, and wireless power transfer.
What is the principle behind a generator?
Electromagnetic induction is used to convert mechanical energy into electrical energy.
What is the principle behind a transformer?
Electromagnetic induction is used to change the voltage of an alternating current.
What is the effect of increasing the number of loops in a coil on the induced voltage?
Increasing the number of loops increases the induced voltage.
What is the effect of increasing the strength of the magnetic field on the induced voltage?
Increasing the strength of the magnetic field increases the induced voltage.
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Test Your Knowledge
What is electromagnetic induction?
The production of an electromotive force in a circuit by a changing magnetic field.
The production of a changing magnetic field by an electric circuit.
The tendency of a conductor to oppose the flow of current.
The process of converting electrical energy into mechanical energy.
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What is Faraday's law of electromagnetic induction?
The strength of a magnetic field produced by a current-carrying wire.
The induced electromotive force in a circuit is directly proportional to the rate of change of magnetic flux through the circuit.
The distribution of electric charge on conductors at rest.
The resistance of a substance to the flow of electric current.
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What is Lenz's law?
The tendency of a conductor to oppose the flow of current.
The direction of an induced current is always such that it opposes the magnetic field that produces it.
The strength of a magnetic field produced by a current-carrying wire.
The distribution of electric charge on conductors at rest.
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What is self-induction?
The production of an electromotive force in a circuit due to a change in the current in the same circuit.
The production of a changing magnetic field by an electric circuit.
The tendency of a conductor to oppose the flow of current.
The distribution of electric charge on conductors at rest.
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What is mutual induction?
The induction of an electromotive force in a circuit due to a change in the current in a neighboring circuit.
The tendency of a conductor to oppose the flow of current.
The production of a changing magnetic field by an electric circuit.
The distribution of electric charge on conductors at rest.
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What is an induced current?
The production of an electromotive force in a circuit by a changing magnetic field.
A current that flows in a conductor due to a changing magnetic field.
The distribution of electric charge on conductors at rest.
The tendency of a conductor to oppose the flow of current.
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What is an induced voltage?
The production of an electromotive force in a circuit by a changing magnetic field.
A voltage produced in a coil or circuit due to a changing magnetic field.
The distribution of electric charge on conductors at rest.
The tendency of a conductor to oppose the flow of current.
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What is magnetic flux?
The measure of the quantity of magnetic field passing through a given area.
The production of a changing magnetic field by an electric circuit.
The distribution of electric charge on conductors at rest.
The strength of a magnetic field produced by a current-carrying wire.
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What are the factors affecting the magnitude of induced voltage?
Temperature, pressure, and volume
Number of loops, strength of magnetic field, and rate of change of magnetic field.
Density, mass, and acceleration
Resistance, current, and voltage
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How can electromagnetic induction be demonstrated?
Using a microscope to examine cells.
Using a coil, magnet, and galvanometer to show the generation of an induced current.
Using a telescope to observe distant galaxies.
Using a balance to measure mass.
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