Two charges q1 and q2 are placed 30 cm apart, as 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
8q1
6q1
8q2
6q2
A
6q2
B
6q1
C
8q2
D
8q1
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