GATE EE 2021 Set 1 — Question 25

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Power Systems → Insulators & Distribution

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Two single-core power cables have total conductor resistances of 0.7Ω0.7 \Omega and 0.5Ω0.5 \Omega, respectively, and their insulation resistances (between core and sheath) are 600MΩ600 M\Omega and 900MΩ900 M\Omega, respectively. When the two cables are joined in series, the ratio of insulation resistance to conductor resistance is ______ ×106\times 10^6.
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