Задача id12015

An electric charge with a constant density p is distributed in the ball. The ball has a spherical cavity of radius r. The center of the cavity is located at a distance l from the center of the charged ball. Determine the electric field strength at point A inside the spherical cavity. Point A is located at a distance a from the center of the charged sphere and at a distance b from the center of the cavity (Fig. 9.4).

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