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AP EAMCET20228 Jul 2022Morning ShiftPhysicsElectrostaticsActual

In the figure, the value of Q so that the electrostatic potential energy of the system becomes zero is

Options

  1. Aq 2
  2. B-2 q 2+ 2
  3. C2 q 2- 2
  4. D2 q

Correct answer

C. 2 q 2- 2

Step-by-step solution

We have U _ System = K [ - q q x + qQ x + - qQ 2 x ] aligned & 0=-q^2+q Q- q Q 2 & 0=-q+Q- Q 2 & Q (1- 1 2 )=q & Q= 2 q 2 -1 & Q= 2 q 2- 2 aligned

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