Question

Magnetic dipole moment and force between two poles numericals

Answer 1

Explanation:

Force between the two poles follows inversely square law:

F=

4πd

2

μ

0

m

1

m

2

F

1

aN=

4π(nd)

2

μ

0

m

1

m

2

F

2

bN=

4π(

n

d

)

2

μ

0

m

1

m

2

F

2

F

1

=

b

a

=

1/n

2

1

1/n

2

∴a:b=1:n

4