where ρ0 = 10¯ C and R is the distance from the center of the spherical volume. Calculate the total charge in a sphere of radius R0 = 10 m.
Solution: To calculate the total charge, we integrate over the sphere of radius R0 using the charge density ρv. The element of volume in spherical coordinates is dv = R2sinθ dR dθ dϕ. The total charge is therefore