Electrostatics

Question: Two small spheres each carrying a charge $q$are placed $r$ metre apart. If one of the spheres is taken around the other one in a circular path of radius $r$, the work done will be equal to



1) Force between them $\times \,r$
2) Force between them $\times \,2\pi r$
3) Force between them $/2\pi r$
4) Zero
Solution: Explanation: Explanation
electric-field-potential

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