EMI AC

A boat is moving due east in a region where the earth's magnetic field is 5.0 × 10-5 NA-1m-1 due north and horizontal. The boat carries a vertical aerial 2m long. If the speed of the boat is 1.50 ms-1, the magnitude of the induced emf is

  1. 0.15 mV
  2. 0.50 mV
  3. 0.75 mV
  4. 1 mV

Answer

Eind = B x v x l

= 5.0 x 10-5 x 1.50 x 2

= 10.0 x 10-5 x 1.50

= 15 x 10-5

= 0.15 mV

The correct option is A.