An electric dipole is placed in a uniform electric field. The net electric force on the dipole:
| 1. | is always zero. |
| 2. | depends on the orientation of the dipole. |
| 3. | can never be zero. |
| 4. | depends on the strength of the dipole. |
An electric dipole is placed in an electric field generated by a point charge.
| (a) | The net electric force on the dipole must be zero. |
| (b) | The net electric force on the dipole may be zero. |
| (c) | The torque on the dipole due to the field must be zero. |
| (d) | The torque on the dipole due to the field may be zero. |
| 1. | (a) only | 2. | (b), (c) |
| 3. | (c), (d) | 4. | (d) only |
An electric dipole is placed at the centre of a sphere. Which of the following statements are correct?
| (A) | The flux of the electric field through the sphere is zero. |
| (b) | The electric field is zero at every point of the sphere. |
| (C) | The electric field is not zero anywhere on the sphere. |
| (D) | The electric field is zero on a circle on the sphere. |
Choose the correct option from the options given below:
| 1. | (A) and (C) only |
| 2. | (B) and (C) only |
| 3. | (D) only |
| 4. | (A) and (D) only |