IIT JEE , AIEEE Forum - Physics , Electricity - how is electric filed insite a conductor =0 if a chage is place inside it?

coolkrazy007

how is electric filed insite a conductor with a cavity =0 ii a chage is place inside the cavitt?

plzz help me ...

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gaurav_cheetah

if a charge is placed in a cavity, it is shielded from external electric field...as such, the electric field inside a conductor is always zero....also, keeping a charge in cavity does not produce electric field inside a conductor as the field inside a conductor is always zero...

shamips

FIRST UNDERSTAND WHY FIELD INSIDE CONDUCTORS IS ALWAYS ZERO.

CONDUCTORS BY DEFINITION CAN CARRY CHARGE THROUGH THEM. tHEY ARE HAVING FREE ELECTRONS IN ABUDANCE. THUS CHARGE SETS A CURRENT INSIDE THE CONDUCTOR AND WITHIN A SHORT TRANSITION TIME ALL THE CHARGE GO TO SURFACE, YOU CAN SAY BY REPULSION. SO WHEN THERE IS NO CHARGE INSIDE, THE FIELD IS ZERO. TAKE A GUASSIAN SURFACE JUST BELOW THE SURFACE OF YR CONDUCTOR, NO CHARGE INSIDE SO FIELD IS ZERO AS PER GAUSS LAW ALSO.

NOW WHEN CHARGE IS INSIDE ACAVITY IT INDUCES AN OPPSITE CHARGE AT INNER SURFACE AND SIMILAR CHARGE AT OUTER SURFACE. nOW IF YOU TAKE GUASSIAN SURFACE INSIDE BODY OF CUNDUCTOR NET CHARGE INSIDE GAUSSIAN SURFACE IS ZERO HENCE FIELD IS ZERO. IT IS DUE TO CAPABILITY OF CONDUCTORS TO GET INDUCED CHARGES WHICH IS DUE TO FREE CHARGE CARRIERS.

srikar_jee

if electricfieild exists inside a charged conductor as there are free electrons the constitue motion hence the chapter deviates from electrostatics and changes into current electricity

sanchit_golu

in a conducting shell there are no of free electrons and each electron repel each other with equal force due to which the charge will distribute over the spherical surface therefore charge is 0 inside it...due to which electric field is also 0 .....

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