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AP EAMCET201921 Apr 2019Evening ShiftPhysicsElectrostaticsActual

Two identical charged spheres separated by a distance repel each other with a force F . If 10 % of electrons are transferred from one sphere to the other than the force between them becomes

Options

  1. AF
  2. B1 . 21   F
  3. C0 . 99   F
  4. D0 . 81   F

Correct answer

C. 0 . 99   F

Step-by-step solution

The figure below represents the two identical spheres. The force between the charged sphere is, F = k q q r 2 If 10 % of electrons are transferred from one sphere to another, then the charge become on I   sphere is q + q 10 = 11 10 q And the charge on I I   sphere is q - q 10 = 9 10 q The force between the spheres is, F ' = k 11 q 10 9 q 10 r 2 F ' = 99 100 k q q r 2 F ' = 99 100 F = 0 . 99 F

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