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JEEMAIN and NEET
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NEET PAST PAPERS
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2005
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Q)
A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of a r permanent magnet such that B is in place of the coil. If due to a current i in the triangle a torque ? acts on it, the side l of the triangle is-
( A )
2
√
3
[
τ
B
i
]
( B )
2
√
3
[
τ
B
i
]
1
2
( C )
2
[
τ
√
3
B
i
]
1
2
( D )
1
√
3
τ
B
i
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