A magnet of total magnetic moment `10^(-2)hati " A-m"^(2)` is placed in a time varying magnetic field, `Bhati(cosomegat)` where B = 1 Tesla and `omega` = 0.125 rad/s. The work done for reversing the direction of the magnetic moment at t = 1 second, is :

Options

A. `0.01J`
B. `0.007 J`
C. `0.028 J`
D. `0.014 J`

Explanation

At t=1 is `B=1 cos (0.125xx(360^(@))/(2pi))~~1:. omega =2mB=0.02J`