Lenz Law: Practice Problem & Solution
Assertion (A): If a coil carrying current in counter clockwise direction moves towards another stationary coil in the same plane, current induced in stationary coil will be counter clock wise. Reason (R): Mutual induction between coils is independent of direction of current.
Short Solution (Best for NEET):
To solve this problem, we apply the core principles of Lenz Law. Understanding the underlying formula is key to arriving at the correct answer below:
Assertion (A) is false: A counter-clockwise current in the moving coil creates a magnetic field pointing out of the page. As it moves towards the stationary coil, the outward flux through the stationary coil increases. By Lenz's law, the induced current will oppose this change by creating an inward magnetic field, which requires a clockwise current.
Reason (R) is true: Mutual inductance \(M\) is a geometric property of the coils and is independent of the direction of current. Since (A) is false and (R) is true, none of the provided options accurately describe the situation.
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