A rectangular coil of length 0.12 
and width 0.1 
having 50 turns of wire is suspended vertically in a uniform magnetic field of strength 
. The coil carries a current of 2 A. If the plane of the coil is inclined at an angle of 
with the direction of the field, the torque required to keep the coil in stable equilibrium will be
Text Solution
Verified by ExpertsD
The required torque is 
where 
is the number of turns in the coil, 
is the current through the coil, 
is the uniform magnetic field, 
is the area of the coil and 
is the angle between the direction of the magnetic field and normal to the plane of the coil.
Here, 
and 
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