Two spheres of radii 2 cm and 4 cm are charged equally, then the ratio of surface charge density on the surfaces of the spheres will be -
Text Solution
Verified by ExpertsThe correct answer is:
B
Let the charge on each sphere be Q.
The charge density on the first sphere (radius 
) is 
.
The charge density on the second sphere (radius 
) is 
.
The ratio of the charge densities is 
.
The ratio of charge density on the surfaces of the spheres is 
.
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