GATE EE 2021 Set 1 — Question 25
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Question
Two single-core power cables have total conductor resistances of and , respectively, and their insulation resistances (between core and sheath) are and , respectively. When the two cables are joined in series, the ratio of insulation resistance to conductor resistance is ______ .
Correct answer
300 to 300
Solution
When two cables are joined in series:
1.The conductor resistances are in series:
.2.The insulation resistances are in parallel because the insulation of both cables is connected between the common core and the common sheath (ground) along the entire length:
.3.The ratio of insulation resistance to conductor resistance is:
Ratio .The value to be filled is 300.Continue learning with Success Tracker
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