The magnitude of the average electric field normally present in the atmosphere just above the surface of the Earth is about 150 N/C, directed inward…

The magnitude of the average electric field normally present in the atmosphere just above the surface of the Earth is about $\displaystyle 150$ N/C, directed inward towards the center of the Earth. This gives the total net surface charge carried by the Earth to be : $$\begin{aligned} & {\left[\text { Given } \epsilon_{\mathrm{o}}=8.85 \times 10^{-12} \quad \mathrm{C}^2 / \mathrm{N}-\mathrm{m}^2,\right.} \\ & \left.R_{\mathrm{E}}=6.37 \times 10^6 \mathrm{~m}\right] \end{aligned} $$