JEE Main 2004 Physics question

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 T, then the e.m.f. developed between the two ends of the conductor is

• (1)depends on the nature of the metal used
• (2)depends on the intensity of the radiationCorrect
• (3)depends both on the intensity of the radiation and the metal used
• (4)is the same for all metals and independent of the intensity of the radiation.