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Physics
Physics
Problem
The magnetic dipole moment
μ
\mu
μ
of a bar magnet having pole strength
m
m
m
and pole separation
2
ℓ
2\ell
2
ℓ
is a)
μ
=
m
ℓ
2
\mu = \dfrac{m\ell}{2}
μ
=
2
m
ℓ
b)
μ
=
2
m
ℓ
\mu = 2m\ell
μ
=
2
m
ℓ
c)
μ
=
m
ℓ
\mu = m\ell
μ
=
m
ℓ
d)
μ
=
2
π
m
ℓ
\mu = 2\pi m\ell
μ
=
2
π
m
ℓ
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