2007-06-03 10:59:01 · 4 answers · asked by bowl114 1 in Science & Mathematics ➔ Physics
Because at high voltages you reduce the fraction of energy loss due to resistance in the wire.
P(loss) = IR^2 = RP^2/V^2, so the larger you make V, the smaller the loss.
2007-06-03 11:05:39 · answer #1 · answered by TychaBrahe 7 · 0⤊ 0⤋
Could be the line loss. The longer the run for the transmission lines the lower the available power at the end. The transmission lines and the materials they are made of actually do have some resistance and over distance this does affect the power.
Same thing in your house. Do not use too many extension cords connected together as you will have line loss. You will have less power available to your device at the end.
2007-06-03 18:06:31 · answer #2 · answered by Anonymous · 0⤊ 0⤋
reason for increasing the voltage in a transmission line is to reduce the current. the energy lost in a transmission line is ampere square times line resistance. the energy lost is in the form of heat energy wasted in the air.
2007-06-03 18:56:48 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Increasing voltage reduces current and line losses. So, size of the current carrying element is also minimised.
2007-06-07 15:30:29 · answer #4 · answered by Brave 3 · 0⤊ 0⤋