A boat is moving due east in a region where the earth’s magnetic field is 5.0 × 10–5NA–1m–1 due north and horizontal. The boat carries a vertical aerial 2m long. If the speed of the boat is 1.50ms-1, the magnitude of the induced emf in the wire of aerial is
(a) 1mV
(b) 0.75mV
(c) 0.50mV
(d) 0.15mV
