Explain why electric power transmitted at high voltage and low currents to distant places?
Answers
Answer:
The primary reason that power is transmitted at high voltages is to increase efficiency. ... The lower current that accompanies high voltage transmission reduces resistance in the conductors as electricity flows along the cables. This means that thin, light-weight wires can be used in long-distance transmission.
Wire resistance causes loses in electric power transmission. If you keep resistance constant, loses are directly proportional to voltage and the square of the current.
If you double the voltage, for the same power the current is halved and power dissipation is effectively halved for the same power.
Another reason is that cable required for transmitting low currents has less cross-sectional area and are lighter. So, it is less expensive than heavier cable. Also the number of towers required a certain distance is also reduced.