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Question

A triangular loop of side l carries a current I. It is placed in a magnetic field B such that the plane of the loop in the direction of B. The torque on the loop is:

A
Zero
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B
IBl
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C
32Il2B2
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D
34Bl2
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Solution

The correct option is D 34Bl2
Since q=900
So, τ=NIAB=1×I×(34l2)B=34l2B
Hence,
option (D) is correct answer.

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