ELECTROSTATIC SHIELDING | CAVITY INSIDE A CONDUCTOR

ELECTROSTATIC SHIELDING( OR SCREENING)

STATEMENT(A): Electrostatic potential is constant throughout the volume of the conductor and has the same value (as inside) on its surface STATEMENT(B): A cavity inside a conductor is shielded from outside electrical influences.

STATEMENT(A): Electrostatic potential is constant throughout the volume of the conductor and has the same value (as inside) on its surface STATEMENT(B): A cavity inside a conductor is shielded from outside electrical influences.

Conductor|Electric Field Inside Conductor Is Zero|Net Charge Inside Conductor Is Zero|Conductor As Equipotential Surface|Electric Field On Surface Of Conductor

A conductor having a cavity is given a positive charge. Then field strength E_(A) , E_(B)and E_(C) at point A( within cavity ), at B ( within conducutor but outside cavity ) and C( near conductor and outside ) respectively will be :

Cavity Inside a Conductor || Examples on Electric Field & Potential

A spherical metallic conductor has a spherical cavity. A positive charge is placed inside the cavity at its centre. Another positive charge is placed outside it. The conductor is initially electrically neutral. {:(,"Column I (Cause)",,,"Column II (Effect)"),((A),"If outside is shifted to other position",,(p),"Distribution of charge on innner surface"),(,,,,"of cavity charges"),((B),"If inside charge is shifted to other position",,(q),"Distribution of charge on outer surface of"),(,,,,"conductor charges"),((C),"If magnitude of charge inside cavity is",,(r),"Electric potential at the centre of conductor"),(,"increased",,,"changes due to charges present"),(,,,,"on outer surface of conductor"),((D),"If conductor is earthed",,(s),"Force on the charge placed inside"),(,,,,"cavity changes"):}

Which of the following statements about solid conductors in electrostatics is (are) true? (I) The electric fie)d inside the conductor is always zero (II) The electric potential inside the conductor is always zero (III) Any net charge is on the surface