Multiple choice

A field of 5 x 10-2 Wb/m2 acts at right angles to the coil of area 0.2 m2 having 100 turns. The coil is removed from the field in 0.05 second. Find the emf induced in the coil in volt?

  1. 25 volt

  2. 1 volt

  3. 40 volt

  4. 20 volt

  5. 8000 volt

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The magnitude of the induced emf ε = dΦB / dt = - d NBA / dt = - N B dA / dt = - 100 x 5 x 10-2 x 0.2 / 0.05 = 20 volt.