A boat is moving due east in a region where the earth's magnetic field is `5.0xx10^(-5) NA^(-1)m^(-1)` due north and horizontal. The boat carries a vertical aerial 2 m long. If the speed of the boat is `1.50 ms^(-1)`, the magnitude of the induced emf in the wire of aerial is

Options

A. 0.75 mV
B. 0.50 mV
C. 0.15 mV
D. 1 mV

Answer

C

Explanation

Induced emf `= vB_(H)l=1.5xx5xx10^(-5)xx2`
`=15xx10^(-5)=0.15 mV`