Question

A circular coil of 1000 turns each with area 1 m² is rotated about its vertical diameter at the rate of one revolution per second in a uniform horizontal magnetic field of 0.07T. The maximum voltage generation will be ______ V.

Options

• 220

• 440

• 540

• 340

Answer 1

A circular coil of 1000 turns each with area 1 m² is rotated about its vertical diameter at the rate of one revolution per second in a uniform horizontal magnetic field of 0.07T. The maximum voltage generation will be 440 V.

Explanation:

e = `-("d"phi)/"dt"=-"d"/"dt"` (NBA cos ωt) = NBA ω sin ωt

So, |e|_max = NBA ω

= 1000 × 0.07 × 1 × 2π × 1

= 140 π ≃ 440