Surface resistance of an insulating material is reduced due to the______________?
Correct answer: C. both (A) and (b)
- A. smoky and dirty atmosphere
- B. humidity in the atmosphere
- C. both (A) and (b)
- D. neither (A) nor (b)
Explanation
Moisture forms a partially conducting film on an insulator, while smoke and dirt provide or retain contaminating conductive paths. Both effects lower surface resistance, especially under humid conditions.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Wiring, Installation and Safety
115 free Wiring, Installation and Safety MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Wiring, Installation and Safety questions
A relay is ___________switch?
Flame proof motors are used in_________________?
Which of the following is the major consideration to evolve a good design?
Due to which of the following fact, in India, aluminium is replacing copper ?
Spark plug makes use of which of the following materials for insulation ?
Due to which of the following reasons copper and aluminium are not used for heating elements ?