Two charges q_1 and q_2 are separated by a distance of 30 cm. A third charge q_3 initially at ' C ' as shown in the figure, is moved along the…

Two charges $\displaystyle q_1$ and $\displaystyle q_2$ are separated by a distance of $\displaystyle 30$ cm . A third charge $\displaystyle q_3$ initially at ' C ' as shown in the figure, is moved along the circular path of radius $\displaystyle 40$ cm from C to D. If the difference in potential energy due to movement of $\displaystyle q_3$ from C to D is given by $\displaystyle \frac{q_3 \mathrm{~K}}{4 \pi \epsilon_0}$, the value of K is: