A metal conductor of length 1 m rotates vertically about one of its ends at angular velocity 5 radians per second. If the horizontal component of earth's magnetic field is $0.3 \times 10^{-4}T$, then the e.m.f. developed between the two ends of the conductor is

Question

( A ) depends on the nature of the metal used
( B ) depends both on the intensity of the radiation and the metal used
( C ) depends on the intensity of the radiation
( D ) is the same for all metals and independent of the intensity of the radiation