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Question

A boat is moving due east in a region where the earth's magnetic field is 5.0×105 NA1m1 due north and horizontal. The boat carries a vertical aerial 2 m long. If the speed of the boat is 1.50 ms1, the magnitude of the induced emf in the wire of aerial is. (in mV)

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Solution

Given:
BH=5.0×105 N/Am , l=2 m , v=1.50 m/sec

Induced emf is given by , E=BHlv

Substituting the data gives,

E=5×105×2×1.50=0.15 mV

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