Two concentric spheres kept in air have radii R and r. They have similar charge and equal surface charge density `sigma`. The electrical potential at their common centre is (where, `epsi_(0) =` permittivity of free space)A. `(sigma (R+r))/(epsi_(0))`B. `(sigma(R-r))/epsi_(0)`C. `(sigma(R+r))/(2 epsi_(0))`D. `(sigma (R+r))/(4 epsi_(0))`

Two concentric spheres kept in air have radii R and r. They have simil

1.	Two concentric spheres kept in air have radii R and r. They have similar charge and equal surface charge density `sigma`. The electrical potential at their common centre is (where, `epsi_(0) =` permittivity of free space)A. `(sigma (R+r))/(epsi_(0))`B. `(sigma(R-r))/epsi_(0)`C. `(sigma(R+r))/(2 epsi_(0))`D. `(sigma (R+r))/(4 epsi_(0))`
Answer» Correct Answer - A

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