Question

A bar magnet of pole strength 50 A.m. is cut into 10 equal parts parallel to its axial line. The intensity of magnetisation of each piece will be :

• A. $\frac{1}{10}$th of initial value
• B. 10 times initial value
• C. same of initial value
  
• D. half of initial value
  

Answer 1

Answer: (C)

same of initial value

$I=\frac{m}{v}$
$=\frac{P}{A}$
P(Pole strength ) will reduced to one-tenth. & Area also reduced to one-tenth
But their ratio will remain same