A magnetic dipole of moment is initially parallel to a uniform magnetic field of

PHYSICS · Single correct · CBSE · Physics · Magnetism and Matter · Magnetism and Matter

Problem

A magnetic dipole of moment

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

is initially parallel to a uniform magnetic field of

0.20\,\text{T}

. Calculate the work that must be done to rotate the dipole to make an angle of

60^{\circ}

with the field (take

\cos60^{\circ}=0.5

). (a)

0.010\,\text{J}

(b)

0.0087\,\text{J}

(c)

0.005\,\text{J}

(d)

-0.005\,\text{J}