(a) Draw a labelled diagrame of an ac generator. Obtain the expression for the emf induced
in the rotating coil of N turns each of cross-sectional are A, in the presence of a magnetic
field ` overset(to) (B)` .
(b) A horizonatal conducting rod 10m long extending from east to west is falling with a
speed 5.0 ms `^(-1)` at right angles to the horizontal component of the Earth's magnetic fields.
` 0.3 xx 10^(-4) Wb m^(-2)`. Find the instantaneous value of the emf induced in the rod .

Explanation

(i) See Q . 29, Set-I , Outside Delhi-2011.
(i) e Blv = `0.30 xx10^(-4) xx10xx5= 1.5 xx10^(-3)V` .