Suppose a coaxial capacitor with inner radius 1.0 cm, outer radius2.0 cm and length 1.0m is constructed with two differentdielectrics. When oriented along the z-axis, εr for0o<= φ<= 180o is 9.0, andεr 180o<= φ<= 360o is 4.0.
(a) Calculate the capacitance.
(b) If 9.0 V is applied across the conductors, determine the electrostatic potential energy stored in each dielectric for this capacitor.