When an electric dipole is placed in a uniform electric field, it experiences. An electric dipole placed in uniform electric field experiences a torque which align the dipole parallel to the direction of the electric field with zero net force.
What happens when an electric dipole is placed in uniform electric field?
Even if we change the orientation, the length and the charge of the dipole, the net force on the dipole will be equal to zero. Hence, the electric force on a dipole when it is placed in a uniform electric field is always zero.
When dipole placed in uniform electric field a dipole experiences a net force a torque both a net force and torque neither a net force and torque?
Now, In a uniform electric field, both the point charges comprising the dipole will experience force, equal in magnitude and opposite in direction. Though the net force will always be zero, the torque will be in the same direction for both the charges. Hence torque will not be zero. Option (C) is the correct answer.
When dipole is parallel to the electric field?
In particular, note that the torque is zero when the dipole and electric field vectors are parallel. Thus, a dipole will always experience a torque that tends to align it with the electric field vector. The dipole is thus in a stable equilibrium when it is parallel to the electric field.
When an electric dipole is placed in a uniform external electric at an angle to the field?
An electric dipole in a uniform electric field experiences (When it is placed at an angle theta with the field) In uniform electric field dipole experience only torque, but no force.
How does an electric dipole behave in an electric field?
In the presence of a uniform external electric field, the dipole aligns with the electric field (the direction from the negative charge to the positive charge being the same as that of the electric field) due to electric forces that are equal in magnitude and opposite in direction acting on the charges, and the net …
Why does a dipole rotate in an electric field?
1: A dipole in an external electric field. (a) The net force on the dipole is zero, but the net torque is not. As a result, the dipole rotates, becoming aligned with the external field. … The forces on the two charges are equal and opposite, so there is no net force on the dipole.
What would happen if the external field E is increasing parallel to P?
In the first case, the electric field is increasing parallel to ‘p’. … So the net force will be towards the negative charge which will cause the dipole to move in the direction opposite to the direction of the electric field.
What condition is required for a dipole to experience a net force from an electric field?
1 An electric dipole experiences a net electric force if the positive charge q is subject to an electric field E (r + d) that differs from E(r) acting on the negative charge q.
What will happen if electric field is not uniform?
Now, for a non-uniform electric field there will be a torque on the dipole but also a net force. Once the dipole comes parallel to the electric field vector a force will act on the dipole in the direction of increasing field.
Why is the electric field inside a conductor zero?
Due to a large number of electrons, the force of repulsion acting in between them is also very high. Hence in order to minimize the repulsion between electrons, the electrons move to the surface of the conductor. Hence we can say that the net charge inside the conductor is zero.
Where does the electric field created by an electric dipole become zero?
There is a spot along the line connecting the charges, just to the “far” side of the positive charge (on the side away from the negative charge) where the electric field is zero.
Where is the electric field of a dipole zero?
Remember that field of a dipole is obtained by superposing fields of it’s constituent charges. As long as these charges are separated, their resultant field is not zero. From above formula for field, if 1+3cos^2(theta)=0, then field is zero.