Why there is no electric field outside of the sphere

AI Thread Summary
The discussion revolves around understanding why there is no electric field outside a hollow spherical conductor with a point charge at its center. When applying Gauss' law, the total electric flux through a Gaussian surface outside the sphere is determined by the enclosed charge. The enclosed charge is the sum of the point charge (-q) and the charge on the conductor (+q), which equals zero. Therefore, since the net enclosed charge is zero, the electric field outside the sphere is also zero. This illustrates the principle that the electric field is influenced by the total charge within a closed surface.
brad sue
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Hi, I need to understand something:

A point charge -q is fixed at the center of a hollw spherical conductor of charge +q. Draw the electric field lines both inside and outside.

Please can you explain me why there is no electric field outside the sphere?
thank you
 
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If you're using Gauss' law to find the electric field, then the total electric flux out of your gaussian surface is proportional to the enclosed charge. If you add up the charge inside your gaussian surface (say, a sphere with a radius bigger than the spherical conductor), what is it? (what is -q + +q?)
 

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