railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Power Systems Transmission and Distribution Underground Cables
The insulation resistance of a cable 20 km long is 1 MΩ. Two cable lengths, 20 km, and 10 km are connected in parallel. The insulation resistance of the parallel combination is:
1
3 MΩ
2
1 MΩ
3
0.66 MΩ
4
0.5 MΩ