Question

What is electrostatic shielding? How is this property used in actual practice? Is the potential in the cavity of a charged conductor zero?

Answer 1

Electrostatic shielding is the phenomenon of protecting a certain region of space from external electric field .

The electric field inside a conductor is zero.

therefore to protect delicate instrumats from external electric field , we enclose them in hollow electric fields, we encloses them in hollow conductor.

In a thunderstorm accompanied by lightening , it is safer to be inside a car or a bus than to be in the open ground or under a tree.

No electrostatic potential is constant through out the volume of the conductor and has the same values as on it's surface

Answer 2

• Electrostatic shielding:

The phenomenon of making a area free from any electric field is termed electrostatic shielding.  

• Use of electrostatic shielding in actual practice:

Electrostatic shielding is used in lightening thunderstorm, it is harmless to sit inside the car, rather than near a tree or in open ground. The metallic body of the car work as electrostatic shielding from lightening.

• Yes, zero field exists inside the cavity of charged conductor.

Hope it helped....