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A metal wire of mass m slides without fr...

A metal wire of mass m slides without friction on two horizontal rails spaced distance d-apart as shown in figure. The rails are situated in a uniform magnetic field B, directed vertically upwards, and a battery is sending a current I through them. Find the velocity of the wire as a function of time, assuming it to be at rest initially.

A

`(Bid)/(m) t`

B

`0`

C

`Bidmat`

D

none

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The correct Answer is:
A
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