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.
What happens when a dipole is placed in an external electric field?
If a dipole is kept in an external electric field, it experiences a rotating effect. By external electric field, we mean electric field that is not induced by dipole itself. The rotating effect is also called torque on the dipole. … This can be done by calculating the net torque on opposite charges of the dipole.
When a dipole is in the uniform external field?
A uniform electric field has constant magnitude and fixed direction. Such a field is produced between the plates of a charged parallel plate capacitor. When two charges in a dipole are separated by some distance, the forces acting at different points result in a torque on the dipole.
When an electric dipole is placed in an electric field?
An electric dipole is placed in an electric field generated by a point charge. The net electric force on the dipole must be zero. The net electric force on the dipole may be zero. The torque on the dipole due to the field must be zero.
What happens to an electric dipole when it is placed in uniform external electric field also what happens if the field is not uniform?
If an electric dipole is placed in a nonuniform electric field, then the positive and the negative charges of the dipole will experience a net force. And as one end of the dipole is experiencing a force in one direction and the other end in the opposite direction, so the dipole will have a net torque also.
How does an electric dipole behave in an external electric field?
When a dipole is in the presence of an external electric field, the dipole will be unaffected, because it has a net charge of zero. … There is no net charge on the dipole because it has equal but opposite charges, but the the dipole rotates clockwise due to a torque that aligns the dipole with the electric field.
What happens when dipole is released?
Magnitude of the two forces are equal but in opposite direction. … This couple gives a torque to dipole, which rotaes the dipole and makes it to align in the direction of field. Once the dipole is aligned in the direction of field, torque vanishes( r x F will be zero, if r and F are in same direction ).
What is dipole in uniform electric field?
An electric dipole is described as a couple of opposite charges q and –q separated by a distance d. … The net force acting on a dipole placed in a uniform electric field is zero. The forces on the two charges constituting the dipole are equal and opposite. Hence, the net force is zero.
What happens when an insulator is placed in an external uniform electric field?
When an insulator, also called the dielectric, is placed in an electric field, it gets polarised. The polarised dielectric reduces the effective electric field.
When an electron and proton are placed in an electric field?
According to our question, when an electron and a proton are placed in an electric field, due to their opposite polarity they attract each other with an electrical force that is equal in magnitude. But the direction of the force will be opposite due to their opposite charge.
What will happen if a electric dipole is placed in an electric field generated by a point charge?
If an electric dipole is placed in the field of a point charge, such that the dipole axis (the line joining the two charges) is along a line of force, that is along any radial line with the charge at the origin, the torque on the dipole would be zero, but the force would be non zero.
When a charged conductor is placed in an external electric field inside the conductor we have?
When a conductor is placed in an external electrostatic field, the net electric field inside the conductor becomes zero after a small instant of time.