Question

A coil in the shape of an equilateral triangle of side l is
suspended between the pole pieces of a permanent magnet
such that B ⃗ is in plane of the coil. If due to a current i in
the triangle a torque τ acts on it, the side l of the triangle is
(a) 2/√3 (τ/B.i)¹/²
(b) 2(τ/√3B.i)¹/²
(c) 2/√3 (τ/B.i)
(d) 1/√3 τ/B.i

Answer 1

OPTION C

2/root 3( t/B.i)

because B is plane coil

Answer 2

Answer:

option b is correct

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