Q. 7

# Is it possible for a current loop to stay without rotating in a uniform magnetic field? If yes, what should be the orientation of the loop?

Yes

Formula used: The net torque of a loop is given by

Where τ is torque

i is current

A is area vector

B is magnetic field

θ is the angle between the area vector and magnetic field

When θ=0,

When θ=180,

If θ is zero or 180° (integral multiple of π) then torque will be zero. So coil will stop its rotation. θ=nπ represents that the magnetic field is in parallel with area vector. So the loop can stay in a uniform magnetic field without rotation.

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