Question

3) In a circular coil of 15.0 cm stream is 3.50 to.The coil is located in a magnetic field of magnitude of 15.0 T in such a way that its normal vector makes an angle of 30 degrees with the field.Determine the torque on the coil and the magnetic dipole moment.

Answer 1

Torque on the coil is given by

$\tau = mB \sin \theta$

And magnetic dipole moment is given by

$m= IA= I \pi r^2$

The information given(specially in the first line) is not clear. You can use the formulas to calculate the values.