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A constant force is being applied on a r...

A constant force is being applied on a road of length 'l' kept at rest on two parallel conducting rails connected at ends by resistance R in uniform magnitic field B shown.

A

the power delivered by force will be constant with time

B

the power delivered by force will be increasing first and then it will decrease

C

the rate of power delivered by the exteranl force will be increasing continuously

D

the rate of power delivered by external force will be decreasing continuosly before becoming zero.

Text Solution

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The correct Answer is:
D
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