Electronics and Communication Engineering - Networks Analysis and Synthesis - Discussion
Discussion Forum : Networks Analysis and Synthesis - Section 1 (Q.No. 21)
21.
A cable has an insulation resistance of 1010 ohms. If the length is doubled, the insulation resistance will be
Answer: Option
Explanation:
Insulation resistance of cable is inversely proportional to length.
Discussion:
5 comments Page 1 of 1.
Sujith k said:
10 years ago
The resistance offered by cable to path of the leakage current is called an insulation resistance. The insulation resistance is inversely proportional to its length. If two cables are joined in series then total length increases and hence their conductor resistances are in series giving higher resistance.
But insulation resistance are in parallel decreasing the effective insulation resistance. Thus if two cables are connected in parallel, conductor resistances get connected in parallel while the insulation resistance get connected in series.
But insulation resistance are in parallel decreasing the effective insulation resistance. Thus if two cables are connected in parallel, conductor resistances get connected in parallel while the insulation resistance get connected in series.
Sid said:
2 years ago
Answer should be C because insulation resistance is diffrent and material resistance is diffrent.
Divya said:
10 years ago
Resistance varies directly with length. So as we double length resistance is doubled.
Nikhil Kumar said:
6 years ago
Here answer should be D part. Because with length area also varied.
Prasad said:
1 decade ago
Why its coming?
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers