General Science • PhysicsHard
Assertion (A): The magnetic flux linked with a closed coil changes when a magnet is moved towards or away from it, inducing an electromotive force. Reason (R): Faraday law of electromagnetic induction states that the magnitude of induced electromotive force is directly proportional to the time rate of change of magnetic flux.
A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion.✓ Correct Answer
B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C. Assertion is true but Reason is false.
D. Assertion is false but Reason is true.
💡 Solution & Explanation
The relative motion between a magnet and a coil alters the magnetic field lines passing through the coil, thereby changing the magnetic flux and inducing an electromotive force as governed by Faraday law of electromagnetic induction. Both the assertion and the reason are scientifically accurate, and the reason provides the exact physical principle explaining the assertion. Heinrich Lenz formulated a complementary rule to determine the direction of the induced current.
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