Electromagnetic Induction
Telangana Open School (TOSS) · Class 12 · Physics
Practice quiz for Electromagnetic Induction — Telangana Open School (TOSS) Class 12 Physics. MCQs and questions with answers to test your preparation.
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Quick Quiz: Electromagnetic Induction
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What is the SI unit of magnetic flux?
Which scientist discovered electromagnetic induction?
When a bar magnet is at rest near a coil, what happens to the galvanometer?
What is the unit of self-inductance?
Sample Questions
Which device converts mechanical energy into electrical energy?
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Generator
A generator works on electromagnetic induction to convert mechanical energy into electrical energy.
What is the direction of induced current according to Lenz's law?
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Opposite to the cause
Lenz's law states that the induced current opposes the change that produced it, ensuring conservation of energy.
What happens to the induced emf when the number of turns in a coil increases?
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Increases
According to Faraday's law, induced emf is proportional to the number of turns in the coil.
What is the purpose of slip rings in an AC generator?
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To transfer current without changing direction
Slip rings allow the transfer of current from the rotating coil to the external circuit while maintaining the alternating nature of the current.
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