Repulsion type moving iron instrument used with AC circuit - deflecting torque?

Q.  A repulsion type moving iron instrument when used with AC circuits, the deflecting torque is
- Published on 10 Sep 15

a. Directly proportional to the rms current
b. Directly proportional to the square of rms current
c. Directly proportional to the peak current
d. Directly proportional to the square of the peak current

ANSWER: Directly proportional to the square of rms current

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