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PhysicsNEET 2019Coulomb's law and superposition

Electric Charges and Fields

Two point charges A and B, having charges +Q+Q and −Q-Q respectively, are placed at a certain distance apart, and the force acting between them is FF. If 25% of the charge of A is transferred to B, then the force between the charges becomes:

  1. A.FF
  2. B.9F16\dfrac{9F}{16}✓
  3. C.16F9\dfrac{16F}{9}
  4. D.4F3\dfrac{4F}{3}

You have the answer. The worked solution — and why the other three were written — is part of a paid pack.

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