Question

Given below are two statements labelled as Assertion (A) and Reason (R).

Assertion (A) : The induced emf in an ideal inductor has its magnitude proportional to the current passing through it.

Reason (R) : Lenz’s law is based on the conservation of angular momentum.

Select the most appropriate answer from the options given below.

​​​​​​​$[$0.77 Mark$]$

• A. Both A and R are true, and R is the correct explanation of A.
• B. Both A and R are true, but R is not the correct explanation of A.
• C. A is true, but R is false.
• D. A is false and R is also false.

Answer 1

The correct option is D A is false and R is also false.

Induced emf in an ideal inductor is given by,

$E=-L\frac{di}{dt}$

$\therefore E\propto \frac{di}{dt}$

$\Rightarrow$ Induced emf in an inductor is proportional to the rate of change of current not the magnitude of current.

Also, Lenz’s law is based on the law of conservation of energy.