From Gauss's law, the electric flux is expressed as:

$\overline{){\mathbf{\varphi}}{\mathbf{=}}\frac{{\mathbf{q}}_{\mathbf{i}\mathbf{n}}}{{\mathbf{\epsilon}}_{\mathbf{0}}}}$

Consider an insulating sphere that has a total positive charge Q distributed uniformly throughout its volume. The sphere has a radius R. In this problem you will calculate the total electric flux through The surface of a closed sphere that is concentric with the insulating sphere.

A. Compute the total electric flux (not field) through a closed spherical surface with radius r < R, where R is the radius of the insulating sphere.

B. Compute The total electric flux (not field) through a closed spherical surface with radius r > R, where R is the radius of the insulating sphere.

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What scientific concept do you need to know in order to solve this problem?

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