A bar magnet of length 10 cm and having the pole strength equal `00.1xx10^(-3)` to is kept in a magnetic field having magnetic induction (B) equal to `4pixx10^(-3)` tesla. It makes an angle of `30^0` with the direction of magnefic induction. The value of the torque acting on the magnet is ...................... Joule.
Options:
(a) `2pixx10^(-7)`
(b) `2pixx10^(-5)`
(c) `0.5`
(d) `0.5 xx10^2`