#16
|
||||
|
||||
An volt meter in parallel to measure amps. Is that possible?
__________________
"Face piles of trials with smiles, for it riles them to believe that you perceive the web they weave, and keep on thinking free" |
#17
|
|||
|
|||
Sure. Ohm's Law
I=E/R R=E/I E=IR Where I= Intensity (current in amps) R=Resistance (in ohms) E=Electromotive force (voltage) So if you have a 33K (33,000 ohm) resistor and current thru it is 4.4 ma. (.0044 amp) What is the voltage across the resistor? |
#18
|
||||
|
||||
You can't measure current (Amperes) with a volt meter. And it is essential to remember that current measurements must always be taken with the meter in series with the circuit to be measured , not "across" it or in parallel. Probably just a type-o, but I saw the statement and thought that it would be worth noting and possibly saving your meter.
__________________
"Face piles of trials with smiles, for it riles them to believe that you perceive the web they weave, and keep on thinking free" |
#19
|
||||
|
||||
Sure you can if you are measuring the voltage drop across a resistor caused by the current flowing through it just like old_coot88 said.
|
#20
|
||||
|
||||
Quote:
In fact most modern Digital Multi-Meters (DMMs) use that principle. In my freshman year of college I built a digital multimeter kit and it used that exact principle. It had a short length of thick wire shorting the + and - current measurement terminals and we had to adjust the length of wire that we soldered between those terminals so that it was exactly 1 Ohm. At that value 2A through it meant 2V across it, 1A -> a 1V drop and so on. The circuit simply measured the voltage drop across that wire that shorted the current measurement terminals and scaled the value according to the range it was set to.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 Last edited by Electronic M; 04-17-2014 at 10:11 PM. |
Audiokarma |
Thread Tools | |
Display Modes | |
|
|