Question

An electrical power plant generates electricity with a current of 50A and a potential difference of 20,000 V. In order to minimize the power losses due to the high current heating up the line, a transformer steps up the potential difference to 500,000 V before it is transmitted. What is the current in the transmission lines?

Answer 1

power = voltage * current

20,000 * 50 = 500,000 i

i = 50 (2/50) = 2 amps

That is why you send big power at high voltage