Questions
If on the concentric hollow spheres of radii r and R (> r) the charge Q is distributed such that their surface densities are same then the potential at their common centre is:
detailed solution
Correct option is D
q1+q2=Q and q14πr2=q24πR2 q1=Qr2R2+r2 and q2=QR2R2+r2 Potential at common centre 14πε0Qr2R2+r2r+QR2R2+r2R=Q(R+r)4πε0R2+r2Talk to our academic expert!
Similar Questions
Two spherical shells are as shown in figure.
Let r be the distance of a point from their common centre. Then, match the following columns and mark the correct choice from the given codes.
| Column-I | Column-II | ||
| i. | Electric field for r < R1 | p. | is constant for q2 and vary for q1 |
| ii. | Electric potential for r < R1 | q. | is zero for q2 and vary for q1 |
| iii. | Electric potential for R1 < r <R2 | r. | is constant |
| iv. | Electric field for R1 < r <R2 | s. | is zero |
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