fluxxxx..
Electricity and Magnetism
Level
3
A charge q is distributed on a ring of radius R. A sphere of equal radius R is constructed with its centre at the periphery of the ring. The electric flux through the surface is? (Consider 'e' in the option as epsilon)
q/5e
q/3e
q/e
q/2e
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1 solution
The part of ring inside the sphere is 2π/3 . so by unitary method we can find that the charge enclosed by sphere is q/3 ...