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NEET2019PhysicsElectrostaticsActual

Two point charges A and B, having charges + Q and - Q respectively, are placed at certain distance apart and force acting between them is F . If 25 % charge of A is transferred to B , then the force between the charges becomes

Options

  1. AF .
  2. B9 F 16 .
  3. C16 F 9 .
  4. D4 F 3 .

Correct answer

B. 9 F 16 .

Step-by-step solution

F = K Q 2 r 2 After transferring 25 % of charge, q 1 = 3 Q 4 and q 2 = - 3 Q 4 F 1 = 9 16 K Q 2 r 2 = 9 16 F

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