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, the work done will be equal to :

A
force between them × r
B
force between them × 2 πr
C
force between them / r πr
D
zero
Solution
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#### Potential energy between any two given particles=kq1q2r

0
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