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A conducting rod of resistance r moves u...

A conducting rod of resistance r moves uniformly with a constant speed v in a uniform magnetic field. If the rod keeps moving uniformly, then the amount of force required is

A

`(vB^(2)l^(2))/(R )`

B

`(2vB^(2)l^(2))/((R+r)`

C

`(vB^(2)l^(2))/((R+r))`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
C
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