Explain electric dipole in details

An electric dipole consists of two equal and opposite charges, -q and +q, separated by a very small distance 2a.

Although in an electric dipole the two charges are equal and opposite, giving a zero net charge, the fact that they are slightly displaced is enough to produce a non-vanishing electric field. In many substances, like H2O, the centres of the positive and the negative charges of the molecules are slightly separated and these resemble electric dipoles.

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