Answer:
a) What is the volume charge density = 1.15 x 10-8c/m3
b) What is the number of excess elementary charges e per cubic meter in the room's air = 7.18 x 10^10 charges/m3
Explanation:
The Concept of Gauss law was applied, the gauss law which relates the electric fields at points on a closed gaussian surface and the net charge enclosed by the surface. The gaussian surface most times are always a sphere, cylinder or in some other symmetrical form, and it must always be a closed surface.
The law was named after the german mathematician and physicist Carl Friedrich Gauss. It was a more elaborate explanation of Coulomb's law.
The steps and necessary susbstitution is as shown in the attached file.
