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yango_17
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Homework Statement
A charged spherical insulating shell has inner radius a and outer radius b. The charge density on the shell is ρ.
What is the magnitude of the E-field at a distance r away from the center of the shell where r < a?
Homework Equations
Gauss' Law
The Attempt at a Solution
I read through the Gauss' law chapter in my textbook, and it stated that the internal electric field of such a charged insulator is zero. Therefore, I know the answer is 0 but I do not know why. Any explanation as to why this answer is correct would be appreciated. Thanks.