Question

A rectangular coil of 250 turns has an average area of \( 20 \, cm \times 15 \, cm \). The coil rotates with a speed of 60 cycles per second in a uniform magnetic field of \( 2 \times 10^{-2} \, T \) about an axis perpendicular to the field. The peak value of the induced emf is:

• A. \( 36\pi \) volt
• B. \( 30\pi \) volt
• C. \( 18\pi \) volt
• D. \( 12\pi \) volt

Hint:

For a rotating coil, peak emf is \( E_0 = NBA\omega \). Always convert area from \( cm^2 \) to \( m^2 \) before substitution.

Answer 1

The Correct Option is C