How many lines of symmetry does the above figure have ?

Options

A. 55 kV
B. 45 kV
C. 63 kV
D. 49 kV

Answer

B

Explanation

`V=1/(4piepsilon_0)[q_1/(0.2)+q_2/(0.2)+q_3/(0.3)]`
`=9 xx10^9 [(10^(-6))/(0.2) - (2xx10^(-6))/(0.2)+(3 xx10^(-6))/(0.3)]`
`=9xx10^3 [5 -10 +10] =45kV`