Problem 30572.
Two charged balls suspended on threads of equal length are lowered into kerosene with a density of 0.8 g/cm^3. What should be the density of the material of the balls so that the angle of divergence of the threads in air and in kerosene is the same? Dielectric constant of kerosene 2.
Detailed solution with a brief record of the conditions, formulas and laws used in the solution, derivation of the calculation formula and answer.
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