If one of the charges is doubled in magnitude while maintaining the same separation between the charges, what is the new magnitude of the force between them?

Magnitude of force doubles.

Explanation:

Force between two charges is given by

             

where q₁ and q₂ are charges and r is the distance between them.

Here one charge is doubled with keeping all others same.

            q₁ = 2 q₁

We have

               

Magnitude of force doubles.

answer and explanation;

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