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A horizontal semi-circular wire of radiu...

A horizontal semi-circular wire of radius r is connected to a battery through two similar springs X and Y to an electric cell, which sends current I through it. A vertically downward uniform magnetic field B is applied on the wire, as shown in the figure. What is the force acting on each spring ?

A

`2pir BI`

B

`1/2pir BI`

C

`BIr`

D

`2BIr`

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