Question Detail
Question
The emf induced in a rotating coil depends on: I. number of turns of the coil; II. friction at the point of suspension of axes of the coil; III. Speed of rotation of the coil; IV. the strength of the field.
Correct Answer
Option C is the correct answer.
Detailed Explanation
By Faraday's Law, induced EMF = -N d(Phi)/dt, which depends on the number of turns (I), the rate of change of flux which is governed by rotation speed (III) and field strength (IV). Mechanical friction at the suspension point (II) does not affect the electromagnetically induced EMF.
Hint
By Faraday's Law, induced EMF = -N d(Phi)/dt, which depends on the number of turns (I), the rate of change of flux which is governed by rotation speed (III) ...