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A horizontal straight wire 10 m long ext...

A horizontal straight wire 10 m long extending from east to west is falling with a speed of `5.0 m s^(-1)` , at right angles to the horizontal component of the earth's magnetic field, `0.30xx10^(-4) Wb m^(-2)`
a) What is the instantaneous value of the emf induced in the wire?
b) What is the direction of the emf?
c) Which end of the wire is the higher electrical potential?

Text Solution

Verified by Experts

a) `e = Blv = 0.3xx5xx164xx10 = 1.5xx10^(-3)V`.
b) By using Fleming.s right hand rule, the direction of induced e.m.f. is west to east direction.
c) Because the rod will act as a source, the east direction will be at higher potential.
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