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A rigid wire consists of a semicircular...

A rigid wire consists of a semicircular portion of radius R and two straight sections the wire is partially immersed in a perpendicular magnetic field B as shown in the figure. Find the magnetic force on the wire if it carries a current `i`.

A

`-2iBR hat j`

B

`2iBR hat j`

C

`iBR hat j`

D

`-iBR hat j`

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