| 1. | When an electric dipole is placed in a uniform electric field, it experiences ? | |
|
Neither any force nor any torque
|
||
|
Force but no torque
|
||
|
Torque but no net force
|
||
|
Force as well as torque
|
||
View Answer
Discuss in Forum
Report Question| 2. | When placed in a uniform field, a dipole experiences ? | |
|
a torque
|
||
|
neither a net force nor a torque
|
||
|
a net force
|
||
|
both a net force and torque
|
||
| 3. | Corona discharge takes place ? | |
|
at the centre of the conductor
|
||
|
outside the conductor
|
||
|
at the surface of a conductor
|
||
|
near the sharp points of a conductor
|
||
| 4. | Which of the following is the best insulator ? | |
|
Graphite
|
||
|
Ebonite
|
||
|
Paper
|
||
|
Carbon
|
||
| 5. | A charged particle is free to move in an electric field. It will travel ? | |
|
along a line of force, if it has some initial velocity in the direction of an acute angle with the line of force
|
||
|
along a line of force, if its initial velocity is zero
|
||
|
always along a line of force
|
||
|
none of the above
|
||
| 6. | A region surrounding a stationary electric dipoles has ? | |
|
no electric and magnetic fields
|
||
|
magnetic field only
|
||
|
electric field only
|
||
|
both electric and magnetic fields
|
||
| 7. | An electric dipole has a pair of equal and opposite point charges q and –q separated by a distance 2x. The axis of the dipole is ? | |
|
Perpendicular to the line joining the two charges drawn at the centre and pointing downward direction
|
||
|
Perpendicular to the line joining the two charges drawn at the centre and pointing upward direction
|
||
|
from positive charge to negative charge
|
||
|
from negative charge to positive charge
|
||
| 8. | Which of the following statements is not true about Gauss’s law ? | |
|
Gauss’s law is based on the inverse square dependence on distance contained in the coulomb’s law
|
||
|
Gauss’s law is not much useful in calculating electrostatic field when the system has some symmetry.
|
||
|
Gauss’s law is true for any closed surface.
|
||
|
The term q on the right side side of Gauss’s law includes the sum of all charges enclosed by the surface.
|
||
| 9. | The force per unit charge is known as ? | |
|
electric field
|
||
|
electric current
|
||
|
electric potential
|
||
|
electric flux
|
||
| 10. | Which of the following statement is correct? The electric field at a point is ? | |
|
discontinuous only if there is a negative charge at that point.
|
||
|
discontinuous if there is a charge at that point.
|
||
|
always continuous.
|
||
|
continuous if there is a charge at that point.
|
||