Thu February 07, 2013 By: Vishal Mishra

define electric dipole moment,

Expert Reply
Fri February 08, 2013

A dipole is simply defined as a system of two equal and opposite charges separated by a small distance. Every dipole possesses a dipole moment, which is defined as a product of charge and distance between two opposite charge. It is a vector quantity. Following is the figure of a dipole

Here, two equal and opposite charges q and (-q) are separated by a small distance 2a. The dipole moment of this dipole will be

Thus we can say that in a dipole, the positive and the negative charges are present separately. In molecules, a dipole is generated due to the difference in the electronegativities of the atoms forming the molecule.

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