A.C power is transmitted from a power house at a high voltage as
Correct answer: B. It is more economical due to less power loss
- A. The rate of transmission is faster at high voltage
- B. It is more economical due to less power loss
- C. Power cannot be transmitted at low voltages
- D. A precaution against theft of transmission lines
Explanation
B is the correct answer A.C. power is transmitted at high voltage because it reduces the current flowing through the transmission lines. According to the formula P=VI, where P is power, V is voltage, and I is current, power loss in the transmission lines is proportional to the square of the current. By transmitting power at high voltage, the current can be reduced, resulting in lower power losses due to reduced resistive heating in the transmission lines
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