The breakdown of insulation of the cable can be avoided economically by the use of___________?
Correct answer: C. both (A) and (B)
- A. inter-sheaths
- B. insulating materials with different dielectric constants
- C. both (A) and (B)
- D. none of the above
Explanation
Inter-sheaths and graded insulation using materials with different permittivities redistribute the electric field and reduce peak stress economically. Hence both methods can help prevent insulation breakdown.
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