Originally Answered: When an dipole is placed in a uniform electric field with a angle of 90° or π/2, its potential energy is 0.
What do you mean by potential energy of electric dipole when placed in electric field?
Potential energy of a dipole in an external fieldElectric potential energy of an Electric dipole in dipole from zero energy position to the desired position (The zero enrgy position to be one when the dipole When an electric dipole of dipole moment p is on it such that P = [ P ] × [ E ] This torque tends to rotate the …
What happens when a dipole is placed in an electric field?
When an electric dipole is placed in a uniform electric field, it experiences a torque but no force. An electric dipole placed in a uniform electric field experiences a torque that aligns the dipole parallel to the direction of the electric field with zero net force.
What is potential energy dipole?
Potential Energy of a dipole in an external field. Potential Energy of a dipole in an external field. Dipole in an external field experiences a torque which tries to align it in the direction of the electric field. The work done to oppose this force gets stored in the form of potential energy.
Why is the potential energy of a dipole negative?
The state where the dipole is pointing in the same direction as the electric is lower than that where the two vectors are anti-parallel, so you want the θ=0∘ state to be lower than the θ=180∘ state. So you insert the negative sign to enforce that.
What is the potential energy of a dipole when it is placed parallel to the electric field?
Explanation: Consider a dipole with charges q1 = +q and q2 = -q placed in a uniform electric field as shown in the figure above. … 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°.
When a dipole is placed with its dipole moment vector along external 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.
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.
When the dipole is antiparallel to electric field the potential energy of the dipole is?
The minimum potential energy of the dipole does not mean the potential energy to be zero. The potential energy of the dipole is minimum when the dipole is parallel to the external electric field. Also, it is the maximum when the dipole is anti-parallel to the external electric field.
When a dipole is aligned with the field then potential energy is given as?
What is the potential energy of a dipole in an external electric field give a proper derivation with final formula?
The potential energy of a dipole in an external field
τ = p × E.
Under what conditions is the potential energy of a dipole in electric field lowest?
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.
What is the energy of a dipole in a uniform electric field?
Energy of a dipole in electric field: We calculate the energy of a diple in a electric field E by bringing the dipole from infinity and placing it such that −q charge is at r. Work done is ( E = −∇V (r)), U = −q V (r) + q V (r + s).