Magnetism Question 215

Question: The magnetic moment of a magnet of length 10 cm and pole strength 4.0 Am will be

[DPMT 2003]

Options:

A) $ 0.4 Am^{2} $

B) $ 1.6 Am^{2} $

C) $ 20 Am^{2} $

D) $ 8.0 Am^{2} $

Show Answer

Answer:

Correct Answer: A

Solution:

$ M=mL=4\times 10\times {{10}^{-2}}=0.4A\times m^{2} $