A equilateral triangular loop of side l carries a current I. It is placed in a magnetic field B such that the plane of the loop is in the direction of B. The torque on the loop is
A
Zero
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B
IBl
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C
√32IB2l2
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D
√34IBl2
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Solution
The correct option is D√34IBl2 τ=NIAB=1×I×(√34l2)B =√34IBl2