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Question

AB is a long wire carrying a current I1 and PQRS is a rectangular loop carrying currect I2 (as shown in the figure)
which among the following statements are correct?
(a) Arm PQ will get attracted to wire AB, and the arm RS will get repelled from wire AB
(b) Arm PQ will get repelled from wire AB and arm RS attracted to wire AB
(c) Forces on the arm PQ and RS will be unequal and opposite
(d) Forces on the arm PQ and RS will be zero
721067_90d88452c5b24dfb8e4b4c0103bf69a7.png

A
Only (a)
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B
(b) and (d)
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C
(a) and (c)
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D
(b) and (c)
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Solution

The correct option is C (a) and (c)
current in wire AB and PQ are in the same direction. Therefore they will attract
current in wire AB and RS are in opposite direction. Therefore they will repeal each other
magnetic field around PQ more than RS. So force on the arms PQ and RS will be unequal and opposite
1144647_721067_ans_12bcc63254744705ab3514c66916734b.png

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