5.1. A three-phase transmission line has flat horizontal spacing with 2 m between adjacent conductors. At a certáin instant the charge on one of the outside conductors is 60 µC/km,

and the charge on the center conductor and on the other outside conductor is - 30 µC/km. Thc radius of each conductor is 0.8 cm. Neglect the effect of the ground and find the voltage drop between the two identically charged conductors at the instant specificied.