Question

Why is the electric power from the generating station transmitted at a high voltage?

• A. To increase energy loss
• B. To decrease energy loss
• C. Less risk of electric shocks
• D. High voltage is easy to transmit

Answer 1

The correct option is B

To decrease energy loss

Power loss due to heating is given by ($I^{2}Rt$, I is the current flowing, R is the resistance of the wire, and t is the time of energy flow.
Current becomes low at high voltage and therefore the loss of energy due to heating ($I^{2}Rt$) in the wires becomes less.
Electrical energy is transmitted to a long distance at 220 kV.