A horizontal straight wire 20 m long ext...

A horizontal straight wire 20 m long extending from east to west falling with a speed of `5.0 m//s`, at right angles to the horizontal component of the earth’s magnetic field `0.30 × 10^(–4) Wb//m^(2)`. The instantaneous value of the e.m.f. induced in the wire will be

3mV

4.5mV

1.5mV

6.0mV

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