Given below are two statements: one is labelled as Assertion A and… | JEE Main 2023 (10 Apr, Shift 2)

Q15JEE Main 2023 · 10 APR · SHIFT 2Easy

Torque, Couple & Equilibrium of Rigid Bodies

Given below are two statements: one is labelled as Assertion $\mathbf{A}$ and the other is labelled as Reason $\mathbf{R}$

Assertion A: An electric fan continues to rotate for some time after the current is switched off. Reason R: Fan continues to rotate due to inertia of motion.

In the light of above statements, choose the most appropriate answer from the options given below.

Show answer and solution

Answer: (c)

After switch-off no driving torque acts, only small friction torque.
Because of rotational inertia (moment of inertia) the fan keeps rotating and slows down gradually.
Both A and R are true and R explains A, so the answer is (c).

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