It is easy to transform a.c. voltages to any desired voltage very efficiently, and it is also easy to rectify a.c. voltages to provide d.c. voltages. This means that both a.c. loads and d.c. loads can be connected to the a.c. supply.
The household supply in the UK is 240 V and is AC (alternate current).
The household supply in the UK is 240 V and is AC (alternate current).
ac transmits the voltage over long distances. so v use ac in trains
There are several different sizes of ac adaptors. There are regular home use ac adaptors and even ac adaptors that are travel sized for use in cars or hotels.
no, must be 3v
NZ uses 230 V ac, 50 Hz.
That depends on what kind of AC system it is (e.g., home, commercial, automotive) and when it was manufactured.
It is dc but a small attached converter can make it ac for home use
I think you are asking how to power a 120 volt home radio on 12 volts. You will need to buy a converter that converts 120 V/AC to 12 V/DC. You can also buy converters that convert 12 V/DC to 120 V/AC. As one runs on DC current and the other runs on AC current, you cannot modify them. A converter is the solution.
To provide PC devices either 12 V AC or 5 V AC, or even ( 12 - 5 = ) 7 V AC. I don't really know whether any PC device uses 7 V AC...
You can't. Buy the correct power supply.
No. Prior to 1995, home AC systems used R-22 and automotive AC systems used R-12. From 1995 onwards, home AC systems used R-410A and automotive AC systems used R-134A.