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Solution


Q.

An emf of 0.08 V is induced in a metal rod of length 10 cm held normal to a uniform magnetic field of 0.4 T, when it moves with a velocity of             [2023]
1 20 ms-1  
2 2 ms-1  
3 0.5 ms-1  
4 3.2 ms-1  

Ans.

(2)

Induced emf=Bv

⇒0.08=0.4(10100)v

⇒v=(0.08×100.4)⇒v=2 m/s