Question

1. Use Gauss' Law to explain how a Faraday cage works (you will have to look up what a Faraday cage is). 3pts) 2. Suppose a charge +q is suspended at the center of an electrically neutral, spherical shell conductor. Does the conductor shield the outside from the field produced by the charge at its center? What does the electric field look like (draw field lines on the diagram below)? Will there be an induced charge on the spherical shell? Draw the distribution of the induced charge on the diagram below. (6pts)

Answer 1

Faraday cages shield their contents from static electric fields. An electric field is a force field surrounding a charged particle, such as an electron or proton.

These cages often look distinctly, well, cagelike. Some are as simple as chain-link fences or ice pails. Others use a fine metallic mesh. Regardless of their exact appearance, all Faraday cages take electrostatic charges, or even certain types of electromagnetic radiation, and distribute them around the exterior of the cage.

and from gauss law we know that electric flux through a gaussian surface is (1 / e_0) times the charge enclosed by gaussian surface

in faraday cage net charge enclosed is zero as equal and opposite induced charges are built up on it's surface which protects the inner system from outside electric field

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