MagnetismHard
Question
A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and is in the plane of the loop. If steady current I is established in the wire as shown in the figure, the loop will
Options
A.rotate about an axis parallele to the wire
B.move away from from the wire
C.move towards the wire
D.remain stationary
Solution
Straight wire will produce a non-uniform field to the right of it. 
will be calculated by the integration but these two forces will cencel each other. Further force on wire ab will be towards the long wire and on wire cd will be away from the long wire. But since the wire ab is nearer to the long wire, force of attraction towards the long wire will be more. Hence, the loop will moved towards the wire.
will be calculated by the integration but these two forces will cencel each other. Further force on wire ab will be towards the long wire and on wire cd will be away from the long wire. But since the wire ab is nearer to the long wire, force of attraction towards the long wire will be more. Hence, the loop will moved towards the wire.Create a free account to view solution
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