A horizontal straight wire 10 m long extending from east to west falling with a speed of 0.5 `ms^(-1)` at right angles to the horizontal component of the earth's magnetic field `0.30 xx 10^(-4)Wb m^(-2)`
(a) What is the instantaneous value of the e.m.f. induced in the wire ?
(b) What is the direction value of the e.m.f. (c) Which end of the wire is at higher electric potential ?