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Charge Carriers

Fill with ions, electrons or holes

Conductors contain mobile charge carriers. In metallic conductors, these charge carriers are .

In electrolytic conductors, the charge carriers are both positive and negative

In semi conductors, the charge carries are electrons and

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Electrostatics of conductors

Important results

Inside a conductor at static condition, electrostatic field is , otherwise the free charge carriers would experience force and drift

At the surface of a charged conductor, electrostatic field must be to the surface at every point, since Electric field should have no tangential component

The interior of a conductor can have no excess charge in the static situation, , and any excess charge must reside at the

Electrostatic potential is throughout the volume of the conductor and has the same value (as inside) on its surface

Electric field at the of a charged conductor is  E = σ / ε0 (magnitude)

The electric field inside the cavity is , is called Electrostatic shielding.

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