2103 V = 40 V (b) C = Q/V = e0(pR2)/d; R = (Qd/Vpe0)1/2 R = 4.24 m 42 A parallel-plate, air-gap capacitor has a capacitance of 0. The plates are 0.5...

2103 V = 40 V (b) C = Q/V = e0(pR2)/d; R = (Qd/Vpe0)1/2 R = 4.24 m 42 A parallel-plate, air-gap capacitor has a capacitance of 0.14 F. The plates are 0.5 mm apart. (a) What is the area of each plate? (b) What is the potential difference if the capacitor is charged to 3.2 C? (c) What is the stored energy? (d) How much charge can the capacitor carry before dielectric breakdown of the air between the plates occurs?