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Electricity field intensity within a conductor is always zero.Why?

Electricity field intensity within a conductor is always zero.Why?

Asked Shaji

Answer:

The main difference between a conductor and an insulator is that the conductors contain plenty of free electrons which are free to move throughout the conductor; whereas the insulators do not have free electrons at room temperature.

When a conductor is held in an electric field, the free electrons inside them instantly drift opposite to the direction of electric field until the electric field due to the drift balances the external electric field and the net electric field inside the conductor becomes zero.

 

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