# The mid points of two small magnetic dipoles of length d in end-on positions, are separated by a distance x, (x >> d). The force between them is proportional to x-n where n is : Option 1) 1 Option 2) 2 Option 3) 3 Option 4) 4

As we discussed in concept

Magnetic moment or magnetic dipole movement -

It is defined as the product of the strength of either Pole and effective length.

- wherein

In magnetic dipole

Hence n=4

Option 1)

1

This solution is incorrect

Option 2)

2

This solution is incorrect

Option 3)

3

This solution is incorrect

Option 4)

4

This solution is correct

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