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Physics · JEE | Current Electricity

हिन्दी

In power transmission over long cables of resistance \( R_c \), if the power delivered at voltage \( V \) is \( P \), the wasted power \( P_c \) in transmission lines is proportional to:

  1. A
    \( V \)
  2. B
    \( V^2 \)
  3. C
    \( \frac{1}{V} \)
  4. D
    \( \frac{1}{V^2} \)
View Answer & Solution

Correct answer · Option D

\( \frac{1}{V^2} \)

Explanation

Wasted power \( P_c = I^2 R_c = \frac{P^2 R_c}{V^2} \), showing it is inversely proportional to \( V^2 \).

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