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Q.

A rod of length 6m is rotated about the normal axis through C as shown. A uniform field of 0.5 T exists parallel to axis of rotation. If angular velocity of rod is 4   rad  s−1, the potential difference across the ends of rod is

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a

Zero

b

2 V

c

6 V   

d

12 V  

answer is C.

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Detailed Solution

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V=12Bωl22−l12

=12× 0.5 × 416−4=12V

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