Pole strength of a magnet is 5 Am and the magnetic length of it is 10 cm. Calculate the magnetic dipole moment of it.

Options

A. `0.5 Am^(2)`
B. `5 Am^(2)`
C. `50 Am^(2)`
D. `20 Am^(2)`

Answer

A

Explanation

Magnetic dipole moment `overset(to)( m_b) = 2P overset(to)(l)`
`therefore m_(b) = 5 xx 10xx 10^(-2)`
`=0.5 "Am"^2`
`P=5 "Am"`
`2l = 10 xx 10^(-2) m`