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Initially the spheres A & B are at potential VA and VB. The potential of A when sphere B is earthed
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a
VA
b
VB
c
VA - VB
d
VA + VB
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Correct option is C
Initially P.D. between A and B is VA - VB. After connecting to earth also P.D. between A and B is VA - VB but potential at B becomes zero, potential at A becomes VA - VB.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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