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MHT CET202210 Aug 2022Morning ShiftPhysicsElectrostaticsActual

Two-point charges +Q and +q repel each other with a force of 100 ~N . Keeping the distance between them unchanged, if Q is increased by 10 % and q is decreased by q the force of repulsion between them will.

Options

  1. Adecrease by 10 ~N
  2. Bdecrease by 1 ~N
  3. Cincrease by 10 ~N
  4. Dremain same

Correct answer

B. decrease by 1 ~N

Step-by-step solution

Given, 100 ~N = k Q q r^2 and F= k(1.1 Q)(0.9 q) r^2 Taking the ratio of above two equations: F=99

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