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NEET2011PhysicsElectrostaticsActual

Three charges, each +q , are placed at the corners of an isosceles triangle A B C of sides B C and A C, 2 a . D and E are the mid points of B C and C A . The work done in taking a charge Q from D to E is

Options

  1. Ae q Q 8 ₀ a
  2. Bq Q 4 ₀ a
  3. Czero
  4. D3 q Q 4 ₀ a

Correct answer

C. zero

Step-by-step solution

Here, A C=B C aligned & V_D=V_E=V & W=Q [V_E-V_D ] & W=Q[V-V] & W=0 aligned

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