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• Topic:

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A total charge Q is broken in two parts Q1 and Q2 and they are placed at a distance R from each other. The maximum force of repulsion between them will occur, when

(1) ${Q}_{2}=\frac{Q}{R},\text{\hspace{0.17em}}{Q}_{1}=Q-\frac{Q}{R}$

(2) ${Q}_{2}=\frac{Q}{4},\text{\hspace{0.17em}}{Q}_{1}=Q-\frac{2Q}{3}$

(3) ${Q}_{2}=\frac{Q}{4},\text{\hspace{0.17em}}{Q}_{1}=\frac{3Q}{4}$

(4) ${Q}_{1}=\frac{Q}{2},\text{\hspace{0.17em}}{Q}_{2}=\frac{Q}{2}$