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Two identical small conducting balls hav...

Two identical small conducting balls have positive charges `q_1` and `q_2` respectively. The force between the balls when they are placed at a separation is F. The balls are brought together so that they touch and then put back in their original positions. Prove that the force between the balls now, cannot be less than F.

A

Less than that before the balls touched

B

Greater than that before the balls touched

C

Same as that before the balls touched

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
B
`F_1=(Kq_1q_2)/(r^2),F_2=(K((q_1+q_2)/2)^(2))/r^2 `
As `((q_1+q_2)/2)^(2) gtq_1q_2 :. F_2 gt F_1`
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