question_answer

Two magnets, each of magnetic moment ?M? are placed so as to form a cross at right angles to each other. The magnetic moment of the system will be  [AFMC 1999; Pb PET 2001]

A)            2 M                                          

B)            \[\sqrt{2}\,M\]

C)            0.5 M                                       

D)            M

Correct Answer: B

Solution :

                   \[\Rightarrow {{M}_{net}}=\sqrt{{{M}^{2}}+{{M}^{2}}}=\sqrt{2}M\]