Why is Alternating Current (A.C) more efficient for long distance transmission of electrical energy?

Question

Thanks.

Answer 1

With A.C you can use transformer to raise the voltage for long distance transmission.
As the power transmited is proportional to V*I ( voltage*current)
the higher the voltage,the lower current and so the losses
RI^2(Joule) for the same power.
(This is a very rough explanation,but is the basic)

Answer 2

as an example the ability plant is providing 1KW for your position at 100V (no longer 110V in order that as that the calculations are extra accessible) the present required to do this 1000W/100V = 10 A as an example the resistance of the cable from the powerplant for your position is 5 ohms. You woud have lost I^2R watts contained in the transmission, ie., 10 * 10 * 5 = 500 W lost. With AC that is amazingly undemanding to step up or step down the voltage using transformers. once you try this, if V1 and I1 are the enter voltage and modern-day, and V2 and I2 are the output voltage and modern-day, then for the transformer, V1*I1 = V2 * I2 as an example the ability plant steps up the voltage to 10 thousand V and then purely earlier achieving your position, steps it all the way down to 100. the present ate up at your position at 100V is 10 A subsequently 100V * 10 A = 10000V * x A the position x is the present alongside the transmission line x = 100 * 10/ten thousand = 0.1A back, assuming the line resistance develop into 5 ohms, the completed ability wasted alongside the transmission line is I^2R = 0.a million * 0.a million * 5= 0.05 W compared to the previous social gathering the position 500 W develop into lost turning in 1000 W for your position. that is a touch simplistic photo, yet regularly illustrates why AC is extra effective thanDC, the position you could't effectively and surely step up and step down the voltage.

Answer 3

I think it has to do with the cost to operate the facility is so high and if it were sent in an original form ( high current) the elec. losses would be so great adding to the cost of the elec.
Therefore, they jack-up the voltage ( reduce the current) to cut down on losses, but then it makes little sense to operate the facility to send it a short distance when it has enough voltage to travel a longer distance with little loss.
Essentially, it is only a matter of economics and " The Bottom Line" like any Industry.

Answer 4

Higher Alternating current Amps.. C\C better then A/C or D/C