Question

The force between two charges 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become ____________.

Options

• 7.20 N

• 11.25 N

• 22.50 N

• 45.00 N

Answer 1

The force between two charges 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become 11.25 N.

Explanation:

`"F" prop 1/"r"^2`

`therefore "F"_1/"F"_2 = ("r"_2/"r"_1)^2`

`therefore 5/"F"_2 = (0.04/0.06)^2`

`therefore "F"_2 = 11.25  "N"`