Question

Which among the following affects the deflection in the galvanometer?

(a) Area of the coil

(b) Current passing through the coil

(c) Speed with which the bar magnet is pulled towards or away from the coil

(d) Resistance offered for current flow

I got this question in an online quiz.

My doubt stems from Faraday and Henry Experiments in chapter Electromagnetic Induction of Physics – Class 12

Answer 1

Correct choice is (c) Speed with which the bar magnet is pulled towards or away from the coil

For explanation I would say: The deflection of the pointer is larger or smaller depending upon the speed with which the bar magnet is pulled towards or away from the coil. Moreover, the direction of deflection of the pointer depends upon the direction of motion of the bar magnet.