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Q1. A 2000 m, 2-core cable is used as a ring main feeder supplied at both ends with 220 V d.c. Loads of 100 A, 150 A, 200 A, and 50 A are connected at points 500 m, 800 m, 1200 m, and 1700 m measured respectively from one end.

The cable resistance (go + return) is 0.2 Ω/km.

(a) Calculate the current in each cable section. (10)

(b) Show the current direction in each cable section. (2)

(c) Calculate the p.d. at each load point. (4)