Two charges \[{{q}_{1}}\] and \[{{q}_{2}}\] are placed 30 cm apart as shown in the figure. A third charge \[{{q}_{3}}\] 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 \[\frac{{{q}_{3}}}{4\pi {{\varepsilon }_{0}}}\,k,\] where k is: [AIPMT (S) 2005]

Two charges \[{{q}_{1}}\] and \[{{q}_{2}}\] are placed 30 cm apart as

1.	Two charges \[{{q}_{1}}\] and \[{{q}_{2}}\] are placed 30 cm apart as shown in the figure. A third charge \[{{q}_{3}}\] 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 \[\frac{{{q}_{3}}}{4\pi {{\varepsilon }_{0}}}\,k,\] where k is: [AIPMT (S) 2005]
A.	\[8\,{{q}_{2}}\]
B.	\[8\,{{q}_{1}}\]
C.	\[6\,{{q}_{2}}\]
D.	\[6\,{{q}_{1}}\]
Answer» B. \[8\,{{q}_{1}}\]