# When the dipole moment of a dipole in an uniform electric field?

## When the dipole moment of a dipole in an uniform electric field?

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. The torque acting on the dipole is given as the cross product of dipole moment and the electric field.

### Do dipoles rotate in an 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.

#### What is the motion of dipole in uniform electric field?

When an electric dipole is placed in a uniform electric field making an angle with the direction of the field as shown in the figure. Thus, electric dipole is under the action of two equal and unlike parallel forces, which give rise to a torque on the dipole.

What happens when an electric dipole is placed in a uniform electric field explain with diagram?

A diagram of a dipole is given below. 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.

When an electric dipole having dipole moment P is placed in an uniform electric field E the torque acting on the dipole is?

An electric dipole of moment p is placed in a uniform electric fieldE . Then. (i) The torque on the dipole is p ×E . (ii) The potential energy of the system is p ⋅E .

## When an electric dipole is held in an uniform electric field the net force F and the torque τ on the dipole are?

Answer: 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.

### Why do dipoles rotate?

A dipole rotates when placed in an electric field if and only if it is not aligned along or totally against (making a 180 degrees angle with) the electric field. In other cases, it rotates to get to a position of equilibrium, where it will not be acted upon by any torque by the electric field. I hope this helps you.

#### What is dipole of an electric field and electric dipole moment?

Two equal and opposite charges separated by some distance constitute a dipole. The product of the charge and distance between them is called the dipole moment. Dipole moment represents the strength of the dipole. The electric field generated by the dipole is proportional to the dipole moment.

What happens when an electric dipole is placed in uniform electric field derive the expression for the same?

Derivation of Torque on an Electric Dipole Now, consider a dipole with charges +q and –q forming a dipole since they are a distance d away from each other. Let it be placed in a uniform electric field of strength E such that the axis of the dipole forms an angle θ with the electric field.

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

zero
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.

## What happens when electric dipole is placed in non uniform electric field?

When a dipole is placed in an electric field, the opposite charges on the dipole both experience a force due to the electric field. Hence the dipole will experience both force and torque when placed in a non uniform electric field. Therefore, the correct answer is option (B).

### How is dipole moment induced in neutral atoms?

A dipole is induced in a neutral atom by an external electric field. The induced dipole moment is aligned with the external field. An important fact here is that, just as for a rotated polar molecule, the result is that the dipole moment ends up aligned parallel to the external electric field.

#### What happens when the dipole moment vector is aligned with electric field?

When this dipole moment vector is aligned with the electric field lines but the direction of this dipole moment is in opposite direction of the electric field,i.e,the line joined from negative towards the positive charge of the dipole is in the opposite direction of the electric field,the dipole is in unstable equilibrium.

What is an electric dipole?

An electric dipole is a pair of charges having equal magnitudes but opposite sign separated at a distance, say d d. When such a dipole is placed in a uniform electric field, the electric field exerts force on the dipole which then rotates the dipole in clockwise or anticlockwise direction.

What is the magnitude of a dipole moment?

If the torque exerted by the field has a magnitude of 2.5×10−7 N·m, the dipole moment but it rotates so it is in the same direction as the field. If the moment has a magnitude of It is rotated to one of the five orientations shown below.