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Three point charges 3nC , 6nC and 9nC ...

Three point charges 3nC , 6nC and 9nC are placed at the corners of an equilateral triangle of side 0.1 m . The potential energy of the system is :

A

89100 J

B

99100 J

C

8910 J

D

9910 J

Text Solution

Verified by Experts

The correct Answer is:
C

`U = (9xx10^(9) xx10^(-9))/(0.1) (18 +54 +27)`
`= 90 xx99 J = 89 10 J `
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