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Find electric field inside and outside of uniformly charge sphere of radius R and q. Also, plot IEI asa function of distance r

Question

Find electric field inside and outside of uniformly charge sphere of radius R and q. Also, plot IEI asa function of distance r

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Solution

To solve this problem, we will use Gauss's Law, which states that the electric flux through a closed surface is equal to the charge enclosed by that surface divided by the permittivity of free space.

  1. Inside the Sphere (r < R):

    For r < R, the sphere can be thought of as a superposition of an infinite number of infinitesimally thin spherical shells. The electric field due to each shell at a point inside the shell is zero. Therefore, the electric field at a point inside the sphere is zero.

  2. On the Surface of the Sphere (r = R):

    At the surface of the sphere, the enclosed charge is q. According to Gauss's Law, the electric field is given by E = q / (4πε₀R²), where ε₀ is the permittivity of free space.

  3. Outside the Sphere (r > R):

    For r > R, the sphere behaves as if all its charge were concentrated at its center. Therefore, the electric field is given by E = q / (4πε₀r²).

To plot |E| as a function of distance r, you would have a graph with the following characteristics:

  • For r < R, |E| = 0.
  • At r = R, |E| jumps to q / (4πε₀R²).
  • For r > R, |E| decreases as 1/r².

The plot would start at the origin (0,0), jump to q / (4πε₀R²) at r = R, and then decrease as 1/r² for r > R. The plot would be discontinuous at r = R.

This problem has been solved

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