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

A

$$5 \times 10^{-9}$$ V

B

$$5 \times 10^{-5}$$ V

C

$$50\mu$$V

D

$$5\mu$$V