In transmission from grid station, power losses are minimized by:
Correct answer: D. Increasing voltage
- A. Decreasing current
- B. Decreasing resistance
- C. Increasing resistance
- D. Increasing voltage
Explanation
Efficient power transmission is achieved by using transformers to increase the voltage, which reduces the current according to the formula P = IV, where P is power, I is current, and V is voltage. By decreasing the current, power losses due to resistance (P = I^2R) are minimized. Transformers allow the voltage to be stepped up for long-distance transmission, and then stepped down for safe distribution at the destination.Decreasing or increasing resistance directly is not practical or efficient due to cost and material limitations. Directly decreasing current is not feasible without a corresponding increase in voltage. Therefore, increasing the voltage is the correct and efficient method to minimize power losses.
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