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Home  >>  AIMS  >>  Class12  >>  Physics  >>  Electric Charges and Fields
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Two small metal spheres A and B (of the same size) are each given a charge q. They are placed in the air and are separated by a distance r. A third similar metal sphere C is touched with the sphere A and is placed midway on the line joining the two spheres A and B.What is the force acting on the sphere A?

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The force acting on the sphere A =$ 3q^2/(8 \pi \in_0 r^2)$
Hence A is the correct answer.
answered May 30, 2014 by meena.p
 

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