Q.

Figure shows a square loop  10cm on each side in the x-y plane with its centre at the origin. An infinite wire is at  z=12cm above y-axis. 

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What is torque on loop due to magnetic force? If torque is expressed as  x×107Nm, fill value of  x. 

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answer is 720.

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Detailed Solution

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Torque=μ0i1,i22πracosθ

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Figure shows a square loop  10 cm on each side in the x-y plane with its centre at the origin. An infinite wire is at  z=12 cm above y-axis.       What is torque on loop due to magnetic force? If torque is expressed as  x×10−7N−m, fill value of  x.