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A 0.5 m rod moves at 4 m/s perpendicular to a 0.2 T field. What emf appears across its ends?
A0.4 V
B0.8 V
C1.6 V
D0.1 V
Answer & Solution
Correct answer: A. 0.4 V
emf = B l v = 0.2 x 0.5 x 4 = 0.4 V.
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