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The insulation resistance of a single -core cable is 200 MW/ km.The insulation resistance for 5 km length is
- a)40MW
- b)1000MW
- c)200MW
- d)8MW
Correct answer is option 'A'. Can you explain this answer?
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The insulation resistance of a single -core cable is 200 MW/ km.The in...
Insulation Resistance of Single-Core Cable
Insulation resistance is an important parameter to determine the insulation quality of a cable. It is defined as the resistance offered by the insulating material to the flow of current through it. The insulation resistance of a single-core cable is given as 200 MW/km.
Calculation of Insulation Resistance for 5 km Length
Now, we need to calculate the insulation resistance for a 5 km length of single-core cable. We can do this by using the following formula:
Insulation Resistance (R) = Resistivity (ρ) x Length (L) / Area (A)
Here, ρ is the resistivity of the insulating material, L is the length of the cable, and A is the cross-sectional area of the cable.
Assuming the same resistivity and cross-sectional area for the cable, we can calculate the insulation resistance as follows:
R = 200 MW/km x 5 km
R = 1000 MW
Therefore, the insulation resistance for a 5 km length of single-core cable is 1000 MW.
Answer
However, the correct answer given in the question is A, which is 40 MW. This is not correct based on the calculation above. It is possible that there is an error in the values given in the question or in the options provided.
Insulation resistance is an important parameter to determine the insulation quality of a cable. It is defined as the resistance offered by the insulating material to the flow of current through it. The insulation resistance of a single-core cable is given as 200 MW/km.
Calculation of Insulation Resistance for 5 km Length
Now, we need to calculate the insulation resistance for a 5 km length of single-core cable. We can do this by using the following formula:
Insulation Resistance (R) = Resistivity (ρ) x Length (L) / Area (A)
Here, ρ is the resistivity of the insulating material, L is the length of the cable, and A is the cross-sectional area of the cable.
Assuming the same resistivity and cross-sectional area for the cable, we can calculate the insulation resistance as follows:
R = 200 MW/km x 5 km
R = 1000 MW
Therefore, the insulation resistance for a 5 km length of single-core cable is 1000 MW.
Answer
However, the correct answer given in the question is A, which is 40 MW. This is not correct based on the calculation above. It is possible that there is an error in the values given in the question or in the options provided.
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Community Answer
The insulation resistance of a single -core cable is 200 MW/ km.The in...
The insulation resistance is MW/km that is it is inversly proportional to the length . Thus when the length increase the MW should decrease .
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