Задача id12019

Inside a thin-walled metal sphere of radius H = 20 cm there is a metal ball of radius r = 10 cm, which has a common center with the sphere. The ball is connected to the Earth through a hole in the sphere using a very long wire (Fig. 9.7). A charge Q = 10-8 C is placed on the outer sphere. Calculate the potential of this sphere, the electrical capacitance of the resulting system of conducting bodies and draw an equivalent electrical circuit.

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