MHT CET 2024 Physics question
Two equal point charges 'q' each exert a force 'F' on each other, when they are placed distance 'x' apart in air. When the same charges are placed 'y' apart in a medium of dielectric constant 'k', they exert the same force. The ratio of distance 'y' to 'x' is equal to
Answer: (A)
Solution
In air . In a medium of dielectric constant the force is reduced by the factor : . Equating the two forces gives , so and $
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