Q.

A rectangular loop carrying current is placed near a long straight fixed wire carrying strong current such that long sides are parallel to the wire. If the current in the nearer long side of the loop is parallel to current in the wire then the loop

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a

experiences no force

b

experiences a force away from the wire

c

experiences a force towards the wire

d

experiences a torque but no force

answer is D.

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Detailed Solution

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Given that A rectangular current loop is placed beside a long current carrying conductor as shown by flaming left hand rule the force resulted on the four sides are F1,F2,F3&F4 as shown F3=F4 and F1>F2.

So it experience force towards the wire.

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