An infinite slab of charge of thickness 2z₀ lies in the xy plane between z = -z₀ and z = +z₀. The volume charge density ρ (C/m³) is a constant.
a. Use Gauss’s law to find an expression for the electric field strength inside the slab (-z₀ ≤ z ≤ z₀).
b. Find an expression for the electric field strength above the slab (z ≥ z₀).
c. Draw a graph of E from z = 0 to z = 3z₀.