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Two smooth horizontal parallel conductin...

Two smooth horizontal parallel conducting rails are connected with a capacitor and a resistor at the two ends as shown. A uniform conducting rod PQ of mass 'm' and length 'l' is dragged with a constant horizontal force 'F'. The terminal velocity aquired by the conducting rod is

A

`(4FR)/(B^(2)l^(2))`

B

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

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
C
When the trminal velocity is acquired
`i = (Bvl)/(R )`
`F= Bil`
`F = (B^(2)l^(2)v)/(R )`
`:. V = (FR)/(B^(2)l^(2))`
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