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NEET2007PhysicsElectrostaticsActual

Charges +q and -q are placed at points A and B respectively which are a distance 2 L apart, C is the midpoint between A and B . The work done in moving a charge + Q along the semicircle CRD is

Options

  1. Aq Q 2 ₀ L
  2. Bq Q 6 ₀ L
  3. Cq Q 3 ₀ L
  4. Dq Q 4 ₀ L

Correct answer

C. q Q 3 ₀ L

Step-by-step solution

W= U= Q (V_D-V_C ) where V_c=0=Q [ q 4 ₀(3 L) - q 4 ₀(L) .0 ] q Q 3 ₀ L

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