Solution to task 310 from Chertov´s for extramural stud

Solution to task 310 from Chertov´s for extramural stud

310. The distance d between two point charges Q1 = 2 nC and Q2 = 4 nC is 60 cm. Determine the point where the third charge Q3 should be placed so that the system of charges is in equilibrium. Determine the charge Q3 and its sign. Will the balance be stable or unstable?

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