Task id16502

Task id16502

Two identical charged small balls, suspended on thin threads of equal length, are in kerosene. What should be the density psh of the balls so that the angle of divergence of the threads in air and in kerosene is the same? Kerosene density pk = 0.8·103 kg/m3; relative dielectric constant of kerosene e = 2.

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Detailed solution. Format gif