Q. If the insulation resistance of a cable of length 20 km is 2 MΩ, what is the insulation resistance of 100 km cable?
A. 0.2 MΩ
B. 0.4 MΩ
C. 0.6 MΩ
D. 0.8 MΩ
Answer: 0.4 MΩ
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