The potential energy is lowest when the dipole is aligned with E and highest if it is anti-aligned. If the field is not uniform, then the magnitude of the electric force acting on the positive charge can be different from that acting on the negative charge, and there can be a net force acting on the dipole.
Under what conditions is the potential energy of a dipole in electric field vanishes?
Typically we choose the zero point of potential energy for a dipole to be such that the average energy is zero if the dipoles are randomly oriented. That means that when the dipole is aligned perpendicular to the field the potential energy is zero.
What is the condition for the potential energy of a dipole is minimum?
When the angle between the dipole moment and electric field is zero then the potential energy of electric dipole is minimum.
What is the potential energy of a dipole in an electric field?
P.E=−pEcosθ=−p⋅E. This is negative when θ is acute and positive when θ is obtuse.
What orientation of the dipole has the least electric potential energy?
The dipole has its least potential energy when it is in equilibrium orientation, which is when its momentum is lined up with Electric field (then τ = 0) It has greater potential energy in all other orientations.
What is the relation between electric field and potential?
The relationship between potential and field (E) is a differential: electric field is the gradient of potential (V) in the x direction. This can be represented as: Ex=−dVdx E x = − dV dx . Thus, as the test charge is moved in the x direction, the rate of the its change in potential is the value of the electric field.
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.
At which point the potential is minimum?
The potential energy is thus minimum when p and E are in the same direction.
At what angle potential energy is zero?
When an dipole is placed in a uniform electric field with a angle of 90° or π/2, its potential energy is 0.
At what position of an electric dipole in an electric field does it have I maximum and II minimum potential energy?
Potential energy of an electric dipole is maximum when it makes 180 degree with electric field and minimum when angle between them is zero degree .
What is the potential energy of a dipole in an external field?
From the above equation, we can see that the potential energy of dipole placed in an external field is zero when the angle Ɵ is equal to 90° or when the dipole makes an angle of 90°.
What kind of superposition is used for electric potential?
The summing of all voltage contributions to find the total potential field is called the superposition of electric potential. It is much easier to sum scalars than vectors, so often the preferred method for solving problems with electric fields involves the summing of voltages.
When an electric dipole is held at an angle in a uniform electric field?
1) the forces experienced by the 2 charges constituting the electric dipole when placed in an uniform external electric field are equal and opposite in nature, the net force on the dipole is zero. No torque act on the dipole when the moment of electric dipole is parallel to the electric field.