Answer to Question #40667 in Electricity and Magnetism for Sanjeev

Question #40667

TWO CONCENTRIC SPHERES OF RADII R AND r HAVE SIMILAR CHARGES WITH EQUAL SURFACE CHARGE DENSITIES ( σ). WHAT IS THE ELECTRIC POTENTIAL AT THEIR COMMON CENTRES ?
1. σ/ϵ0(R+r)
2. σ/ϵ0(R+r)
3. σR/ϵ0
4. σr/ϵ0

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