AP EAMCET Engineering 2011 Solved Paper

Given, pole strength =m
and magnetic moment =M
When it is cut 5 times parallel to its axis, pole strength, m′=

m

6

When it is cut 3 times perpendicular to its axis, then length 2l′=

2l

4

∴ pole strength, m′=

m

6

and magnetic moment,
M′=(

m

6

)(

2l

4

)=

M

24