Two particles having charges q1 and q2 when kept at a certain distance, exert a force F on each other. If the distance between the two charges is reduced to half then the force exerted on each other would be:
A
2F
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B
4F
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C
8F
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D
16F
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Solution
The correct option is B4F Let the force be F=kq1q2r2 ....(1)