question_answer

A bar magnet of moment \[3.0\text{ }A-{{m}^{2}}\]is placed in a uniform magnetic induction field of \[2\times {{10}^{-5}}T.\] If each pole of the magnet experiences a force of \[6\times {{10}^{-4}}N.\] The length of the magnet is:

A)  0.5 m                                   

B)  0.3 m

C)  0.2 m                                   

D)  0.1 m