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Question

done in carrying a charge Q1 once round a circle of radius R with a charge Q2 at the centre I Is

  1. fraction numerator Q subscript 1 Q subscript 2 over denominator 4 pi epsilon subscript 0 R squared end fraction
  2. Zero
  3. fraction numerator Q subscript 1 Q subscript 2 over denominator 4 pi epsilon subscript 0 R end fraction
  4. Infinite

The correct answer is: Zero

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