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Due to the presence of the current I1 at...

Due to the presence of the current I1 at the origin in the figure.

A

the forces on AB and DC are zero

B

the forces on AD and BC are zero

C

the magnitude of the net force on the loop is given by `(mu_(0)II_(1))/(4pi)[2(b-a)+(pi)/(3)(a+b)]`

D

the magnitude of the net force on the loop is given by `(mu_(0)II_(1))/(24ab)(b-a)`

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The correct Answer is:
B
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