Question

If a magnet of pole strength m is divided into 2n equal parts by dissecting along lines parallel to length, then pole strength of each segment will be

• A. same as m
• B. $\frac{m}{n}$
• C. $\frac{m}{2n}$
• D. $\frac{2m}{n}$

Answer 1

The correct option is A same as m

Solution: As we know that,

If we cut a magnet along the length in two equal parts then its pole strength becomes half

and if we cut it thrice along its length then pole strength becomes

the $(\frac{1}{3}{)}^{rd}$ of its original pole strength.

So,Now we cut the magnet in (2n) equal parts then

new pole strength$=\frac{m}{2n}$

hence,

The corrrect opt : C