A circular loop of wire having a radius of carries a current of

PHYSICS · Multi-part · AP · Physics C: Electricity and Magnetism · Magnetic Fields and Electromagnetism · Magnetic Fields and Electromagnetism

Problem

A circular loop of wire having a radius of

8.0\,\text{cm}

carries a current of

0.20\,\text{A}

. A unit vector parallel to the dipole moment

\mathbf{m}

of the loop is

0.60\hat{\mathbf{i}}-0.80\hat{\mathbf{j}}

. If the loop is located in a uniform magnetic field

\mathbf{B}=(0.25\,\text{T})\hat{\mathbf{i}}+(0.30\,\text{T})\hat{\mathbf{k}}

, find: (1) The torque on the loop. (2) The magnetic potential energy of the loop.