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The insulation resistance of a cable of 10 km length is 1 MΩ. The resistance for a length of 40 km is
- a)1 MΩ
- b)4 MΩ
- c)0.25 MΩ
- d)Can’t be determined
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
The insulation resistance of a cable of 10 km length is 1 MΩ. Th...
l1 = 10 km, R1 = 1 MΩ, l2 = 40 km
1/R2 = 40/10
R2 = 1/4 = 0.25 MΩ
Most Upvoted Answer
The insulation resistance of a cable of 10 km length is 1 MΩ. Th...
Ω. This means that when a voltage is applied to the cable, the current that flows through the insulation is very low, as the insulation is preventing the current from flowing through the cable's conductors. The insulation resistance is a measure of how effective the insulation is at preventing current flow through the cable.
In practical terms, a cable with a high insulation resistance is less likely to suffer from electrical faults, such as short circuits or ground faults. This is because the insulation is preventing current from flowing where it shouldn't, which reduces the risk of electrical arcing and other forms of electrical damage.
However, it's worth noting that insulation resistance is not the only factor that determines the safety and reliability of a cable. Other factors, such as the cable's voltage rating, current carrying capacity, and environmental conditions, also play a role in determining the cable's performance and safety.
In practical terms, a cable with a high insulation resistance is less likely to suffer from electrical faults, such as short circuits or ground faults. This is because the insulation is preventing current from flowing where it shouldn't, which reduces the risk of electrical arcing and other forms of electrical damage.
However, it's worth noting that insulation resistance is not the only factor that determines the safety and reliability of a cable. Other factors, such as the cable's voltage rating, current carrying capacity, and environmental conditions, also play a role in determining the cable's performance and safety.
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The insulation resistance of a cable of 10 km length is 1 MΩ. The resistance for a length of 40 km isa)1 MΩb)4 MΩc)0.25 MΩd)Can’t be determinedCorrect answer is option 'C'. Can you explain this answer?
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