Скачать или смотреть High voltage transmission class 10 | 10th class physics ch 15 high voltage transmission | Urdu

High voltage transmission 10th class physics ch 15 | high voltage transmission physics wallah sabaq in urdu hindi


15.10 HIGH VOLTAGE TRANSMISSION
Electric power is usually generated at places which are far from
the places where it is consumed. The power is transmitted over
long distances at high voltage to minimize the loss of energy in
the form of heat during transmission. As heat dissipated in the
2
transmission cable of resistance R is I Rt. Hence, by reducing
the current through the cable, power loss in the form of heat
dissipation can also be reduced. So the alternating voltage is
stepped up at the generating station.
It is then transmitted to the main sub-station. This voltage is
stepped down and is transmitted to the switching
transformer station or the city sub-station. At the city sub station, it is further stepped down to 220 V and supplied to
the consumers. A schematic diagram of high voltage
transmission is shown in Fig. 15.20