Numerical - Insulation resistance of given length of cable

Q.  The insulation resistance of a cable of length 10 km is 1M Ω . For a length of 100 km of the same cable, what will be the insulation resistance?
- Published on 18 Dec 15

a. 1 M Ω
b. 10 M Ω
c. 0.1 M Ω
d. 0.01 M Ω

ANSWER: 0.1 M Ω

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    Discussion

  • Sunil parihar   -Posted on 07 Aug 17
    Since, insulation resistance(R) is inversly proportional to length of conductor(L)
    So, R1/R2=L2/L1
    10^6/R2=100/10

    R2=0.1M ohm
  • Priyanka das   -Posted on 28 Jul 16
    Please calculate and provide explanations

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