It was originally used for "current" which is represented today in amps. It stood for the (intensity) of the current.
10 amps
All electric appliances use amps. Amps are a measure of current.
I'm pretty sure Fall Out Boy use Marshall amps.
a regular toaster uses about 12.5 amps
Some people use amps to change its quality. I've seen them do that before.
about 3 or 4
There are three formulas that you can use. Amps = Volts/Ohms Amps = Watts/Volts Amps = sq root of Watts/Ohms
You use Ohm's Law to make your calculation. Volts = Amps x Resistance Amps = Volts / Resistance
The only amps a7x uses is the Marshall jcm800
Could be about 13 amps at 240 v.
volts X amps = watts standard 120 X 15 amps =1800watts microwaves generally use about 1000 watts which is 8.33 amps...
amps like.. amplifiers? it depends on how many speakers you have. or amps like.. current draw? again. depends on your power needs, your power amps... ect