railway RRB JE (CBT I + CBT II) Mock Test 2024 Power Systems Transmission and Distribution Underground Cables
Why should a long-distance electric cables be derated?
I. Increase in temperature of the conductor changes the resistance
II. To compensate for the voltage drop in the cables
III. To reduce system losses
IV. To increase transmission efficiency
1
Only I and II
2
I, II, and III
3
Only III and IV
4
All I, II, III and IV