Physics

Problem

A circular coil of 100 turns and area

3.14\times10^{-2}\,\text{m}^2

carries a current of

1.0\,\text{A}

. It is free to rotate about a vertical axis and is placed in the horizontal component of Earth’s magnetic field,

B_H = 3.0\times10^{-5}\,\text{T}

. Determine the maximum torque that can act on the coil.