We need help on our science fair project.
2007-01-06 07:00:08 · 6 answers · asked by xxfieldhockeychick27xx 1 in Science & Mathematics ➔ Other - Science
The volts in an electrical device suchas the volts in a plug is 12
2007-01-06 07:02:02 · answer #1 · answered by Anonymous · 0⤊ 0⤋
A Voltmeter measures Electro Motive Force (EMF), the potential to push electrons through a resistance.
Theoretically no electrons need to flow to measure Voltage but practically all Voltmeters are actually Galvanometers (Ammeters) with an arbitrarily large resistance in series which forces the response curve of the Ammeter to be very close to the response of a theoretical Voltmeter. (This is only significant if your Voltmeter "loads" (draws significant current from) the Voltage being measured.)
2007-01-06 07:28:56 · answer #2 · answered by J C 5 · 0⤊ 0⤋
Ampherage is the amount of electricity in a wire (think of it as the water in a hose ) Voltage however is the amont of "push" behind the electricity (think of it as water pressure). And a voltmeter can measure this pressure or voltage expressed as volts.
2007-01-06 07:12:50 · answer #3 · answered by alanbp 3 · 0⤊ 0⤋
a voltmeter measure primarily and basically volts.
the meter genralizes unit of measure that my cousin Mr. Volt, invented back in the early 60's. first he invented the ammeter, that measured amps back in the late 50's.
and for the other guys whom answered that volts are "pressure"... amps are "pressure". volts are "volume", if you could use such a parable.
2007-01-06 14:34:02 · answer #4 · answered by Billy 2 · 0⤊ 0⤋
Measures electrical potential difference in volts.
2007-01-06 14:10:11 · answer #5 · answered by V 2 · 0⤊ 0⤋
It "meters" volts. It tells you how many volts exist between its two probes. An ammeter would do the same thing for current - amps.
2007-01-06 07:05:39 · answer #6 · answered by Flyboy 6 · 0⤊ 0⤋