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A conducting wire xy of lentgh l and mas...

A conducting wire `xy` of lentgh `l` and mass `m` is sliding without friction on vertical conduction rails `ab` and `cd` as shown in figure. A uniform magnetic field `B` exists perpendicular to the plane of the rails, `x` moves with a constant velocity of

A

`(mgr)/(B^(2)l^(2))`

B

`(mgr)/(2B^(2)l^(2))`

C

`(mgr)/(2Bl^(2))`

D

`(mgr)/(Bl^(2))`

Text Solution

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The correct Answer is:
A
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