question_answer

If a magnet of pole strength m is divided into four parts such that the length and width of each part is half that of initial one, then the pole strength of each part will be

A)            \[m/4\]                                  

B)            \[m/2\]

C)            \[m/8\]                                  

D)            \[4m\]

Correct Answer: B

Solution :

                   For each part \[{m}'=\frac{m}{2}\]