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conducter have charges only on surfaces.why?

conducter have charges only on surfaces.why?

Grade:12

1 Answers

AKASH GOYAL AskiitiansExpert-IITD
419 Points
10 years ago

Dear Pavan

Inside a conductor, electro static field is zero.

A conductor has free electrons, and they experience a force only when the electric field is not zero. In a static situation, the free electrons gets itself distributed in such a way that, the electric field everywhere inside the conductor is zero

In a static situation, when a conductor is charged, the excess charges reside only on the surface. If we consider any arbitrary volume inside a conductor, the electrostatic field on closed surface bounding the arbitrary volume is zero. Thus, the flux through the surface is zero. By Gauss's theorem, there is no net charge enclosed by closed surface. If the surface and volume is made very small, it shows that there is no net charge inside and no excess charge can reside on the surface

2nd Reason

we know very well that any particle or body always tries to acquire minimum potential energy. the charges will acquire min. P.E only when they are on the surface

 

All the best.

AKASH GOYAL

AskiitiansExpert-IITD

 

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