how can we say that Inside a conductor, electrostatic field is zero?
prasanjeet kumar , 12 Years ago
Grade 8
General Physics> how can we say that Inside a conductor, e...
1 Answers
Saurabh Koranglekar
In electrostatics free charges in a good conductor reside only on the surface.
There are at least two ways to understand this
So the free charge inside the conductor is zero. So the field in it is caused by charges on the surface. Since charges are of the same nature and distribution is UNIFORM, the electric fields cancel each other.
Consider a Gaussian surface inside the conductor. Charge enclosed by it is zero (charge resides only on surface). Therefore electric flux =0 Furthermore, electric flux = electric field * area. Since area cannot be zero, electric field is zero
There are at least two ways to understand this
So the free charge inside the conductor is zero. So the field in it is caused by charges on the surface. Since charges are of the same nature and distribution is UNIFORM, the electric fields cancel each other.
Consider a Gaussian surface inside the conductor. Charge enclosed by it is zero (charge resides only on surface). Therefore electric flux =0 Furthermore, electric flux = electric field * area. Since area cannot be zero, electric field is zero
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