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Q.

A loop of flexible conducting wire of length 0.5m lies in a magnetic field of 1T perpendicular to the plane of the loop. If loop carries a current of 1.57A, it turns in to a circle Then find tension developed in the wire 

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a

0.125 dyne

b

1.125 N  

c

1.25 dyne   

d

0.125 N

answer is D.

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Detailed Solution

T=BiL2π

=1×1.57×0.52×3.14=0.125 N

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