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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 circular path of radius 40 cm from C to D. If the difference in potential energy due to movement of q 3 from C to D is given by 0 3 4 K q πε the value of K is

1. 8q 1
2. 8q 2
3. 6q 2
4. 6q 1

Correct answer: 8q 2

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