Why an electric dipole placed in a uniform electric field does not undergo acceleration?

Explanation: Because the force on negative charge and the force on positive charge equal and opposite direction so it does not undergo acceleration because Force net is always zero.

What happens when an electric dipole is placed in uniform electric field?

The direction of the electric force depends on the nature of charge. If the charge is positive, then the direction of the electric force is in the direction of the electric field. Hence, the electric force on a dipole when it is placed in a uniform electric field is always zero.

Is it possible a dipole is placed in uniform electric field but it does not rotate?

YES. An electric dipole also resists itself about the pivot point to any of the changes which are to be caused by the uniform electric field (i.e. a kind of force). The inertia of rotation is one of the manifestation of those resistances.

What will happen when we put an electric dipole in an uniform electric field define and express torque?

The magnitude of both forces is identical, yet they are moving in opposing directions. A pair is formed by these equal and opposing parallel forces. This pair applies a torque on the dipole, causing it to spin and align in the field direction. The force, however, is always zero in uniform field.

When a dipole is placed in a uniform external field?

Question: An electric dipole is placed at an angle of 30o with an electric field of intensity 2×105 N/C. It experiences a torque of 4Nm. Calculate the charge on the dipole if the dipole length is 2cm.

When electric dipole is placed in uniform electric field its two charges experience equal and opposite forces?

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When electric dipole is placed in uniform electric field, its two charges experience equal and opposite forces, which cancel each other and hence net force on electric dipole in uniform electric field is zero.

When an electric dipole has dipole momentis placed in an uniform electric field what is the torque acting on the dipole?

When a dipole is placed in a uniform electric field it experiences a torque which aligns to the direction of the electric field with zero net force.

How does torque on the dipole in uniform field depends on its orientation?

Electric dipole will experience a torque when dipole vector is not parallel to electric field direction. The torque τ = p × E = pESinθ. when p and E are parallel then angle θ between the two vectors is zero, hence there will not be any torque.

When an electric dipole is placed in a uniform electric field with its electric dipole moment parallel to the electric field?

An electric dipole is placed in a uniform electric field E with its dipole moment p parallel to the field. Find (i) the work done in turning the dipole till its dipole moment points in the direction opposite to E. (ii) the orientation of the dipole for which the torque acting on it becomes maximum.

When electric dipole is placed in a uniform electric field its two charges experience equal and opposite forces?

Why doesn’t a dipole in an electric field accelerate?

It doesn’t undergo acceleration because the field is uniform. The value of electric field is constant everywhere. Now we have a dipole. Meaning, a positive charge and a negetive charge of the same magnitude, situated at a fixed distance. Also, there is a formula for the amount of force applicable on a charge q in an electric field E, F=q.E.

Why is there a net force acting on a dipole?

In an electric field that is not uniform, there is a net force acting on the dipole as well as torque because the electric forces are either not equal in magnitude, are not always in opposite directions, or both. The question can be answered without any diagram.

What is the torque on an electric dipole?

When an electric dipole is places in a uniform electric field, it experiences no force as the electric force on both the negative and the positive charge are equal in magnitude but opposite in direction so they cancel out. But, it experiences a torque (couple) and hence it rotates. What is the net torque on the electric dipole?

How do you rotate an electric dipole?

The electric field will apply a force to +e in the direction of the electric field and a force to -e in the direction opposite the electric field. This will rotate the electric dipole. Recall from Physics 1250 that torque is defined as τ=r×F.

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