ISRO Electrical Engineering (EE) 2013 - Question 41

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The voltage stress will be maximum in an underground cable at

  • A. The surface of the sheath
  • B. The surface of the conductor
  • C. The surface o the insulation.
  • D. The surface of the armour.

Answer: B. The surface of the conductor

Explanation: Electric stress in a cable is greatest at the conductor surface (E = V/(r ln(R/r))).

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