why are electric field is zero in a cavity in a conductor
Asked by gov622488 | 16th Apr, 2021, 05:14: PM
If a coductor has cavity , then inside cavity electric field is zero due to external charge distribution .
This is because of shielding effect of conductor.
In electrostatics it can be proved that , if a spherical shell has some charge distribution,
then inside spherical region electric field is zero.
Hence in general, electric field is zero in a region enclosed by a closed surface if the closed surface
has some charge distribution.
A cavity inside a conductor is a region enclosed by a closed surface. Surface of conductor gets induced charges
due to external charge distribution. But inside the cavity , electric field will be zero due to shielding effect.
Answered by Thiyagarajan K | 16th Apr, 2021, 05:40: PM
- What are conductors and insulators?
- Why insulators are dielectrics?
- What do you understand by bound and free charges? Explain briefly.
- Why the electrostatic field is zero in the interior of a conductor?
- Explain why just outside the surface of a charged conductor, electric field is normal to the surface.
- What do you know about the electrostatic shielding? Write its some applications.
- Explain why the net charge in the interior of a conductor is zero and any excess charge given to the conductor resides at its surface only.
- Why does the electric field inside a dielectric decrease when it is placed in an external electric field?
- State four important properties exhibited when a conducting body is placed in an electric field?
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