It is named for Alessandro Volta, who invented the first modern chemical battery. For more look here: http://en.wikipedia.org/wiki/Alessandro_Volta
Batteries come with different voltages.
my name is moe
In the UK, 230-240 volts.AnswerFor the UK, the legal requirement is 230 V (-6%/+10%). Incidentally, volts don't 'come out' of a socket!!!
My understanding is that it takes about 20,000 volts to arc between the two parts of the spark plug and most automotive coil put out 20,000-50,000 volts.
Kilovolts or kV.
As the name suggests, yes it does.
15 voltsThe result would only be 15 volts if they were connected in series. If in parallel, a 10v and a 5v battery would probably come out with a voltage of either 10 volts or 7.5 volts, there's no way to tell for sure though.
Potential or Electromotive Force (EMF).
It draws 2.5Amps
volts, amps, watts
The potential for someone to come along later on and get the wires mixed up causing damage to electrical appliances or lights.
It means they come in different voltages to supply power to different things that require different voltages.