Question

A 100 turn coil of area 0.1 m^2 rotates at half a revolution per second. It is placed in a uniform magnetic field of 0.01 T perpendicular to the axis of rotation of the coil. Calculate the maximum voltage generated in the coil?

(a) 256.33 V

(b) 89.12V

(c) 0.314 V

(d) 3.1455 V

I have been asked this question in a job interview.

My question is based upon AC Generator topic in chapter Alternating Current of Physics – Class 12

Answer 1

The correct answer is (c) 0.314 V

Explanation: The maximum voltage generated in the coil,

e0 = nBAω

e0 = nBA × (2πv)

e0 = 100 × 0.01 × 0.1 × 2π × 0.5

e0 = 0.314 V