Question

if the distance between two charge is halved and charges are also doubled then force between them
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Answer 1

Answer:

The force between the two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. Hence, if distance between charges is halved (charges remaining kept constant), the force between the two charges is quadrupled.

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Answer 2

F = kq1q2. This direct proportionality states that if any of q1 or q2 is change, the force F is changed. If q1 is doubled leaving q2 unchanged, F is doubled. If q2 is doubled leaving q1 unchanged, F is doubled.

If both q1 and q2 are doubled leaving the distance between them unchanged, the magnitude of the force F is quadrupled