A point positive charge is brought near an isolated conducting sphere (figure). The electric field is best given by:
1. | 2. | ||
3. | 4. |
A point charge \(+q\) is placed at a distance \(d\) from an isolated conducting plane. The field at a point \(P\) on the other side of the plane is:
1. | directed perpendicular to the plane and away from the plane. |
2. | directed perpendicular to the plane but towards the plane. |
3. | directed radially away from the point charge. |
4. | directed radially towards the point charge. |
A hemisphere is uniformly charged positively. The electric field at a point on a diameter away from the centre is directed:
1. | perpendicular to the diameter. |
2. | parallel to the diameter. |
3. | at an angle tilted towards the diameter. |
4. | at an angle tilted away from the diameter. |
(a) | always continuous. |
(b) | continuous if there is no charge at that point. |
(c) | discontinuous only if there is a negative charge at that point. |
(d) | discontinuous if there is a charge at that point. |
Choose the correct option:
1. | (a), (b) | 2. | (b), (d) |
3. | (c), (d) | 4. | (a), (d) |