Why electric field inside a conductor is zero?

Answer 1

we say an object a conductor when it has large no of electrons in the conduction band.which means that there are enough electrons which can respond to an external field falling on the conductor.

when electric field falls on a conductor these electrons move opposite to the direction to the field.thus they are separated far from its parent atoms.so the electrons gather on one side of conductor and create a negative charge density there.
and the parent atoms from electric field inside a conductor is zero which the electrons are detached become deficient in negative charge so a positive charge density build up there.

due to the separation of positive and negative charge a new electric field is created inside the conductors.this electric field is just equal and opposite to the external field and thus cancels it.so electric field inside a conductor becomes zero .

it happens only in conductors bcos it have a large no of free electrons to respond to the external field.In materials which we call 'insulators' electrons cannot leave there parent atom appreciably so it cannot cancel external field and so electric field inside a insulter dont becomes zero.

but in an conductor there are finite no of charges.SO there is a limit to the magnitude of the external field which can be nullified by the conductor.if field mare then this is applied then there will be no movable electrons present and then electric field will exist between the conductor.this is called Breakdown

but usually the Magnitude of maximum field that can be applied is soo large that we cannot encounter ordinarily on our earth.and so we say that "electric field inside a conductor is ALWAYS zero"

Answer 2

A *static* electric field inside a conductor is 0. The potential on the conductor is constant because the charges in the conductor would move otherwise. But then the constant potential throughout the interior is a solution of the Laplace equation. But the electric field is the gradient of the potential, so it is zero there.

If there are moving charges or changing magnetic fields, this argument fails and the electric filed can be non-zero. This is also easy to see since light can go through the inside of a conductor. Remember that light is an electro-magnetic wave.

Answer 3

A conductor will distribute charge evenly on its surface. This works out so that the electric field caused by the charges on one side will be exactly canceled out be the charges on the opposite side.

This is true wherever you move inside the conductor.

Answer 4

Like charges repel each other. When billions of (negatively-charged) electrons are flowing through a wire, they are also trying to push away from each other - or away from the centre leaving no charge there! (This is simplified layman's terms, of course!)

Answer 5

because the charges move to the surface

Answer 6

b coz of the phenomenon called electrstatic sheilding........

Answer 7

because of the electic force