You have a coil of N turns, with current I through it.
It is in a magnetic field B, which causes it to feel a torque.
Give an expression for its magnetic dipole moment.
The Attempt at a Solution
Well, I know magnetic dipole moment is A x I
So for a coil of N turns it should be A x IN.
The problem is, A isn't specified in the problem, which makes me wonder if there's a better/different way to do this. Any ideas?