There are four shells A, B, C and D of radii a, 2a, 3a and 4a, respectively. Shells B and D are given charges +q and -q, respectively. Shell C is now earthed. The potential difference between A and C is - Kq/2a
- Kq/3a
- Kq/4a
- Kq/6a
There are four shells A, B, C and D of radii a, 2a, 3a and 4a, respectively. Shells B and D are given charges +q and -q, respectively. Shell C is now earthed. The potential difference between A and C is
- Kq/2a
- Kq/3a
- Kq/4a
- Kq/6a










