The net force on the dipole is zero. The electric field exerts a torque on the dipole which causes it to rotate.
What is the net force on a dipole in an electric field?
Therefore, the net force on the dipole is zero. 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.
How do you find the net force of a dipole?
Net force on a dipole due to an electric field can be determined by the magnitude of the electric field and that of the charges. Multiply the magnitude of charge by the electric field. Net force : qE + (-qE) = 0.
What is the net force and torque on an electric dipole in a uniform electric field?
Answer: 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 same direction for both the charges. Hence torque will not be zero.
What is the net electric dipole moment?
The electric dipole moment is a measure of the separation of positive and negative electrical charges within a system, that is, a measure of the system’s overall polarity.
Are electric field lines a reality?
No, they do not exist. Electric field lines are only imaginary. They are the paths along which an imaginary unit charge would move when free. Their number is infinite as paths (Electric field lines) can be infinite.
Does a perfect electric dipole feel a net force in a uniform electric field?
When a dipole is immersed in a uniform electric field, as illustrated in Figure 16.4. 3, the net force on the dipole is zero because the force on the positive charge will always be equal and in the opposite direction from the force on the negative charge.
What is the net force on a dipole in non uniform electric field?
When an electric dipole is placed in a non uniform electric the net force on the dipole due to the electric field will be non-zero as well as the torques it experiences in the field will be non-zero.
What is the net force in uniform electric field?
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.
How does dipole behave in electric field?
In an electric field a dipole undergoes a torque, tending to rotate so that its axis becomes aligned with the direction of the electric field. … The electric dipole moment, a vector, is directed along the line from negative charge toward positive charge.
How can we represent uniform electric field?
Uniform electric field is represented by parallel and equally spaced filed lines.
Is it necessary for an electric dipole to experience a net force?
When a dipole is placed in a uniform electric field and dipole vector direction is not parallel to field direction, each chargs of dipole experiences a force. … Once the dipole is aligned to electric field, the net force will be zero because they are in opposite direction.
What is the formula of torque in electric field?
Show that the torque on an electric dipole placed in a uniform electric field is. τ =P. ×E.