Question

Which one is the best mode for power transmission.. ?? AC or DC..??

Answer 1

Definitely AC. It can be transformed from high voltage low current, to low voltage high current. This way power can be sent will less losses, since the power loss in a transmission line is
\[P = I ^{2}R\]

Small current leads to small losses, then it is transformed a few times at substations and in smaller transformers by your house. DC must be sent as is, and thats why it was done away with.

Answer 2

There is less power loss in DC

Answer 3

One more benefit is there is no need of 3 wires for 3 phases as there is only one phase in DC

Answer 4

No, the power loss is proportional to the current in the line. With AC you can send less current (at a higher voltage). DC needs 2 lines to work, not one. AC can be 2 or 3 wires depending on the application. Most electric motors in machines and appliances require AC. It is easy to make DC with incoming AC but to make AC out of DC requires inverters, which are expensive and complex machines. If you want to see why the entire world decided AC is better, look up the Westinghouse/General electric AC/DC war that took place around the turn of the century. It was Nikola Tesla who designed most of the machinery for our AC system.

Answer 5

In transmission , there is no need to keep neutral...

Answer 6

Are you asking or telling? In old DC transmission lines there were two, power and common.

Answer 7

the power loss is maximum in case of ac but it is preferred because the dc power can be modified (change in frequency,amplitude and phase)according to the required power.....

Answer 8

but where as in dc the frequency is minimum and fixed,and dc power cannot be transmitted easily....

Answer 9

ac is the best....it can be trasmitted over long distance with low power loss......as volage across two ends are high..... current is low..... so as power is i squared there is low power loss as compared to dc......

Answer 10

It is definitely A.C.