Two conducting spheres of radii 3 cm and 1 cm are separated by a distance of 10 cm in free space. If the spheres are charged to same potential of 10 V each, then the force of repulsion between them is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Let Q 1 and Q 2 be the charge on the two conducting spheres of radii 
and 
, respectively.
Potential, 
Charge, 
… (i)
and 
Charge, 
… (ii)
According to Coulomb's law, force of repulsion between them is
[using Eqs. (i) and (ii)]
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