two short magnets apply a force F on each other, if the separation between them is halved then what's the new force between them approximately?

ans.. 16F

A bar magnet can be considered as a magnetic dipole. Now the force between two magnetic dipole is given by
Where r is the distance between them. Now if the distance is halved the new force will be
So new force will be 16 times of the old force.

  • 22
What are you looking for?