Electrical energy is transmitted over large distances at high alternating voltages. Which of the following statements is (are) correct ?

Options

A. For a given power level, there is a lower current.
B. Lower current implies less power loss.
C. Transmission lines can be made thinner.
D. It is easy to reduce the voltage at the receiving end using step-down transformers.

Answer

A, B, D

Explanation

To transmit power over large distances at high alternating voltages so current flowing through the wires will be low because for a given power (P).
`P=V_"rms" I_"rms"`, P is given so,
`V_"rms" I_"rms"` is same.
Hence, when `V_"rms"` is high `I_"rms"` is low
So in power loss = `I_"rms"^2` R=low (`because I_"rms"` is low)
Now at the receiving end high voltage is reduced by using step-down transformers.