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AP EAMCET2004PhysicsElectrostatics

Three point charges 1 C ,-2 C and -2 C are placed at the vertices of an equilateral triangle of side 1 metre. The work done by an external force to increase the separation of the charges to 2 metre in joule is ( ₀= permittivity of air)

Options

  1. A1 4 ₀
  2. B1 8 ₀
  3. C1 16 ₀
  4. Dzero

Correct answer

D. zero

Step-by-step solution

Work done by the external force must be zero.

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