The electrostatic stress in underground cables is_________?
Correct answer: C. maximum at the conductor and minimum at the sheath
- A. same at the conductor and the sheath
- B. minimum at the conductor and maximum at the sheath
- C. maximum at the conductor and minimum at the sheath
- D. zero at the conductor as well as on the sheath
- E. none of the above
Explanation
In a coaxial cable, electric stress is inversely proportional to the radius. Consequently, it is maximum at the conductor surface and decreases to its minimum at the sheath.
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