Three charges are located on a horizontal axis.
12 µC −0.8 µC 12 µC
p
1.69656 m
2.9 m 2.9 m
Determine the magnitude of the electric
field at p, vertically above the charge −0.8 µC
as shown in the figure. Let up be the positive direction. The Coulomb constant is
8.98755 × 10
9
N · m2
/C
2
.
Answer in units of V/m