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Question

Two point charges each of  +1μC are at a distance of 3 m apart. The work done in bringing the two charges closer to a distance 1 m apart is
  1. 0.006 J
  2. 0.008 J
  3. 0.0006 J
  4. 0.06 J


Solution

The correct option is A 0.006 J
W=U2U1=14πϵ0q1q2[1r21r1]=9×109×1012[1113]=9×23×103W=0.006J

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