# Three point charges $q_1= 1\mu C,q_2=-2 \mu C\;and\;,q_3= 3 \mu C$ are placed at $(1m, 0,0), (0,2m,0)$ and $(0,0,3m)$ respectively. Find the electric potential at origin.

$(D)\;9.0 \times 10^3 volt$