NEET Physics Question - Electromagnetic Induction - Faraday's Law of Electromagnetic Induction

Assertion (A): At any instant, if the current through an inductor is zero, then the induced emf may not be zero.

Reason (R): An inductor tends to keep the flux constant.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

Assertion (A) is true: The induced EMF is \(emf = -L \frac{dI}{dt}\). Even if \(I=0\) instantaneously, \(frac{dI}{dt}\) can be non-zero (e.g., during oscillation or switching). Reason (R) is true, describing Lenz's law. However, R is not the correct explanation for A, as A focuses on instantaneous values of \(I\) and \(frac{dI}{dt}\).

Rankers Physics

Induced EMF in an Inductor

Solution:

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