Physics

Problem

Uniform magnetic fields of

0.30\,\text{T}

along the

+x

direction and

0.40\,\text{T}

along the

+y

direction act simultaneously. A magnetic dipole of moment

0.20\,\text{A\,m}^2

is initially aligned along

+x

. Find the minimum work required to rotate it so that it finally points along

+y

. a)

0.020\,\text{J}

0.060\,\text{J}

0\,\text{J}

0.10\,\text{J}