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
(a) force between them × r
(b) force between them × 2πr
(c) force between them/2πr
(d) zero
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PHYSICS
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 :
December 30, 2019avatar
Sherry Tanwar
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Potential energy between any two given particles
=
r
kq
1
q
2
since revolving in circle does not change the distance r between these charges, change in P.E. will be equal to zero
hence
work done=0
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