# Magnitude of point charge

by bastige
Tags: charge, magnitude, point
 P: 245 Coulomb's Law $$\mid \underline{E} \mid=\frac{1}{4 \pi \epsilon_{0}}\frac{Q}{r^2}=\left[\frac{1}{C^2N^{-1}{m^-2}}\frac{C}{m^2}\right]$$ So that gives you the magnitude of Q, and the direction of the electric field lines tells you the sign of the charge. It's a point charge so its that simple