![]() Hooked up in series? We want the ammeter toīe hooked up in series because we want to measure the current through a line in the circuit. ![]() But why is the voltmeterĪlways hooked up in parallel and the ammeter always Will let me measure the current that's flowing Again, ammeters always hooked up in series with the element that I could put it down here, that tells me the current in this strip. But for an ammeter, you have to break the circuit For a voltmeter, just kept it out here and just touch those leads wherever you needed to touch them. For a voltmeter, youĭidn't have to do that. To the one side of the ammeter, connect to the other side of the ammeter. You have to disconnect something here, then connect that connection So you have to disconnect, it's kind of a pain to hook up an ammeter sometimes. So you can put it over here too, but it's gotta be hooked up in series. It doesn't matter what side I put it on, the current going into R three will equal the current going out. This current would have to flow straight through the ammeter and this is telling me how much current goes through R three. One side of the ammeter, the other lead would So if I wanted to know the current going through R three, I could just stick theĪmmeter right in here. Don't hook up the ammeter in parallel, tell you why in a minute. And for an ammeter youĭo not hook up an ammeter in parallel with the element But if I wanted to measure the current, I don't use a voltmeter, I use an ammeter. That's how you use a voltmeter: always hooked up in parallel. The positive and negative terminals of the battery and see if the voltage across the battery is what I think it is. The voltage across R one and if I wanted to make sure my battery was functioning correctly, I could take my voltmeter and I can hook up the leads across Voltmeters you always hook up in parallel. ![]() Or take the voltmeter, put it over here, and if I connect the leads across R one in parallel, notice I'm hooking up the voltmeter in parallel. Those leads right here, this voltmeter will tell me Leads of the voltmeter and I just connect them to either side of the circuit element that I want to determine I can't plug it in the circuit like that. How do you use it? You take that voltmeter, So a circle with a v in it is the symbol we use for a voltmeter. What if you wanted toĮxperimentally measure the voltage across some of these elements? You'd have to use a voltmeter. You have a circuit here and you had a battery with a voltage v and there were resistors one, resistor two, and resistor three up here, and there was currentįlowing through here.
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