Numerical -Insulation resistance for a length of single core cable

Q.  A single core cable has a conductor diameter of 1 cm and the insulation thickness of 0.4 cm. If the specific resistance of insulation is  5.5 * 1014 Ω -cm, what will be the insulation resistance for a length of 3 km?
- Published on 18 Dec 15

a. 0.234 * 109 Ω
b. 0.257 * 109 Ω
c. 0.352 * 109 Ω
d. 0.211 * 109 Ω

ANSWER: 0.352 * 109 Ω

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    Discussion

  • Dhaval Detroja   -Posted on 25 Oct 16
    1/2 (5.5*10^14/(3.14*0.9*3000*10^2)
  • Nandini k j   -Posted on 17 Oct 16
    Please give the explaination in the question

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