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A coil in the shape of an equilateral tr...

A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of a permanent magnet such that `vec(B)` is in the plane of the coil. If due to a current I in the triangle, a torque `tau` acts on it, the side l of the triangle is

A

`(2)/(sqrt3 ) ((tau)/(Bi))^((1)/(2))`

B

`2((tau)/(sqrt3Bi))^((1)/(2))`

C

`(2)/(sqrt3) ((tau)/(Bi))`

D

`(1)/(sqrt3) (tau)/(Bi)`

Text Solution

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The correct Answer is:
B
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