ISRO Electrical Engineering (EE) 2017 - Question 28

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Assuming constant transmission efficiency, if voltage is increased ‘n’ times, the size of the conductor would be

  • A. Reduced to 1/n^2 that of the original
  • B. Increased to n^2 that of the original
  • C. Reduced to 1/n that of the original
  • D. Increased to n times that of the original

Answer: A. Reduced to 1/n^2 that of the original

Explanation: For given power P, distance l, and percentage loss, conductor volume is inversely proportional to V² (Volume ∝ 1/V²). If voltage increases by a factor of n, conductor volume reduces to 1/n².

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