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Two charges q₁ and q₂ are placed 30 cm apart, shown in the figure. A third charge q₃ is moved along the arc of a circle of radius 40 cm from C to D. The change in the potential energy of the system is $\frac{q_{3}}{4 {πε}_{0}} k$ , where k is

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Correct option is A

Change in potential energy (ΔU)=Uf−Ui⇒ΔU=14πε0q1q30.4+q2q30.1−q1q30.4+q2q30.5⇒ΔU=14πε08q2q3=q34πε08q2∴k=8q2

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Two charges q1 and q2 are placed 30 cm apart, shown in the figure. A third charge q3 is moved along the arc of a circle of radius 40 cm from C to D. The change in the potential energy of the system is q34πε0k, where k is

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Two charges q₁ and q₂ are placed 30 cm apart, shown in the figure. A third charge q₃ is moved along the arc of a circle of radius 40 cm from C to D. The change in the potential energy of the system is $\frac{q_{3}}{4 {πε}_{0}} k$ , where k is