Class 12PhysicsElectrostatic Potential and CapacitanceConductor, Electrostatic Shielding, Induced Charge and Charge Redistribution on conductor
Medium"The electric field inside the hollow region of a conductor in a uniform electric field is zero". Explain.
(N/A) Consider a conductor with a cavity as shown in the figure.
There are no charges inside the cavity.
Regardless of the size and shape of the cavity, if a conductor with a cavity is placed in an external electric field, the electric field inside the cavity remains zero.
If the conductor is charged or charges are induced on a neutral conductor by an external field, all charges reside only on the outer surface of the conductor.
Any cavity in a conductor remains shielded from external electric influence. This phenomenon is known as electrostatic shielding.
For example, when we are in a car during a thunderstorm with lightning, we should close all the doors of the car. If lightning strikes the car (or a live current-carrying wire falls on the car), electrostatic shielding develops on the outer surface of the car, and we remain safe inside.
There are no charges inside the cavity.
Regardless of the size and shape of the cavity, if a conductor with a cavity is placed in an external electric field, the electric field inside the cavity remains zero.
If the conductor is charged or charges are induced on a neutral conductor by an external field, all charges reside only on the outer surface of the conductor.
Any cavity in a conductor remains shielded from external electric influence. This phenomenon is known as electrostatic shielding.
For example, when we are in a car during a thunderstorm with lightning, we should close all the doors of the car. If lightning strikes the car (or a live current-carrying wire falls on the car), electrostatic shielding develops on the outer surface of the car, and we remain safe inside.
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