Find the electric field inside a hollow plastic ball of radius R that has charge Q uniformly distributed on its outer surface. Give your answer as a multiple of Q/ε0.Express your answer in terms of some or all of the variables R, r and the constant π.

The electric field inside the hollow plastic ball is zero.

Explanation:

According to Gauss's law, the electric field at the closed Gaussian surface is given by

Now, to find the electric field inside the hollow plastic ball, we choose a spherical Gaussian surface inside the ball. And since all of the charge lies on the surface of the ball, the Gaussian surface does not enclose any charge; therefore, the Gauss's law gives:

The electric field inside the hollow plastic ball is zero.

answer; /// i believe that the correct answer is (c)

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