Electic Dipole

What is the force acting on a dipole placed in a uniform electric field?

The net force acting on the electric dipole is zero, as the dipole consists of two opposite charges that apply force in opposite directions.

What is the SI unit of the dipole moment?

The dipole moment is measured in Coulomb-metre. It is also the SI of dipole movement.

Give an example of the electric dipole.

An example of an electric dipole is pair of electric charges of opposite signs and equal magnitude separated by a small distance.

What is the Direction of an Electric Dipole Moment?

As we know that electric dipole moment is a vector quantity so it has both magnitude and direction and its direction is always considered from the negative charge to the positive charge.

When is the torque maximum on a dipole?

If the dipole is kept perpendicular to the electric field, then the torque generated is maximum.

When is the torque minimum on a dipole?

If the dipole is kept parallel to the electric field, then the torque generated is minimum.

Why do the electric field lines not form closed loops?

Because the direction of an electric field is from positive to negative charge, it does not form closed loops. As a result, a line of force can be seen as starting with a positive charge and terminating with a negative charge.



Electric Dipole

An electric dipole is defined as a pair of equal and opposite electric charges that are separated, by a small distance. An example of an electric dipole includes two atoms separated by small distances. The magnitude of the electric dipole is obtained by taking the product of either of the charge and the distance between them. In this article, we will learn about electric dipole its application, and others in detail.

Table of Content

  • What is Electric Dipole?
  • Visualising Electric Dipole
  • Magnitude and Dimension of an Electric Dipole
  • Direction of Electric Dipole Moment
  • Electric Potential due to a Dipole (V)
  • Electric Field of an Electric Dipole
  • Dipole in an External Electric Field
  • Physical Significance of Dipoles
  • Solved Examples on Electric Dipole

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What is Electric Dipole?

A pair of equal and opposite point charges q and –q separated by a distance 2a form an electric dipole and the electric dipole moment (p) is the product of the charge and the space between the charges (2a). It is used to determine the strength of an electric dipole....

Visualising Electric Dipole

Let’s take two charges +q and -q equal in magnitude but opposite in direction, and the distance between them is d. Then this system is called the electric dipole....

Magnitude and Dimension of an Electric Dipole

An electric dipole is a vector quantity and its magnitude is given as,...

Direction of Electric Dipole Moment

Electric dipole moment is a vector quantity and hence it has a unique direction. The direction of the electric dipole is from negative charge to positive charge. The Axis of the electric dipole moment is the line that joins both charges....

Electric Potential due to a Dipole (V)

Let’s take two charges -q and +q placed at A and B respectively. The distance between them AB is d  they form a dipole as p = qd the centre of AB is Q. Now, if any point P which makes an angle θ with the AB and QP is r then the electric potential at P by the electric dipole is given by,...

Electric Field of an Electric Dipole

Coulomb’s law and the superposition principle may be used to calculate the electric field of a pair of charges (–q and q) at any point in space. For the following two scenarios, the results are simple and clear,...

Dipole in an External Electric Field

The image given below shows an electric dipole kept in an electric field and torque applied to it....

Physical Significance of Dipoles

With the help of electric dipole moment, we can easily determine the geometry and orientation of any compound in 3-D space....

Solved Examples on Electric Dipole

Example 1: Given a uniform electric field, find the flux of this field through a square of side 20 cm, whose plane is parallel to the y-z plane. What would be the flux through the same square, if the plane makes an angle of 30° with the x-axis?...

Electic Dipole – FAQs

What is the force acting on a dipole placed in a uniform electric field?...