Suppose we have a magnetic needle of length 2l with magnetic moment ‘M’ and pole strength ‘m’. We divide it into two pieces from the middle. What will be the magnetic moment and pole strength of the resultant pieces?

Asked by Topperlearning User | 1st Jun, 2015, 01:29: PM

Expert Answer:

Length = 2l
Magnetic moment = M
Pole strength = m
If the magnetic needle is halved from the middle, then
Length = l
Magnetic moment becomes half i.e. = M/2
Pole strength remains same i.e. m.

Answered by  | 1st Jun, 2015, 03:29: PM