The electric field intensity at the point P, distance r = 1.50 m outside of a spherically charged body of radius R = 0.45 m, is E = 1.40 * 10^N/C. Find the electric charge q on the sphere and the surface charge density σ.
Find the electric field between the plates of a parallel plate capacitor of area A = 2.00 x 10^-2 m^2 if a charge q = 6.00 μC is placed upon them.