A single core cable has a conductor of a diameter of 3 cm and the inside diameter of the lead sheath is 6 cm. If the cable is designed for an operating voltage of 33 kV (line to neutral). Then the minimum stress in the insulation of the cable is _________(Given ln 2 = 0.693).
1
39.90 kV/cm
2
22.44 kV/cm
3
35.08 kV/cm
4
19.90 kV/cm