Two spherical cavities, of radii a and b, are hollowed out from the interior of a (neutral) conducting sphere of radius r (fig. 2.49). at the center of each cavity a point charge is placed-call these charges qa and qb. (a) find the surface charge densities aa, ab, and ar. (b) what is the field outside the conductor? (c) what is the field within each cavity? (d) what is the force on qa and qb?
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Two spherical cavities, of radii a and b, are hollowed out from the interior of a (neutral) conducti...
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