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.
The electric field at a point is:
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 |
1. (a, b)
2. (b, d)
3. (c, d)
4. (a, d)