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The ammeter is basically a Galvanometer with a small resistance to parallel with it. As we know that, if we connect two resistances in parallel, then the equivalent resistance is equal to the the value which is less than the value of lowest resistance connected in parallel.
suppose if we connect 1 ohm & 0.1 ohm in parallel, then the equivalent of it will be
0.0909 ohm (less than 0.1 ohm). means in parallel circuit the equivalent resistance become smaller.
as like this a small parallel resistance across galvanometer decreases the value of the value of resistance of it.
since it gets very small value, so it connected in series to measure the value of current in the circuit. due to very low resistance, it drops very low voltage on it ( upto can be negligible) so we assume that it works like a short circuit.
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∙ 13y ago
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How is an ammeter converted to a voltmeter?
The ammeter is used in series, because you want to measure the current through a circuit. The voltmeter is used in parallel, because you want to measure the voltage across a circuit. If you were to place the voltmeter in series, no current would flow because of the relatively high impedance of the voltmeter. If you were to place the ammeter in parallel, you would create a short-circuit, due to the relatively low impedance of the ammeter.
How do you check a dc ammeter?
a dc ammeter is a ammeter which has three pins and it works by two wires.
Why does an ammeter have a low resistance while a voltmeter has high resistance?
I am going to assume that you mean low "resistance" in an open circuit test and are performing this with a multimeter. An ammeter works by place a very small amount of resistance in series with a circuit and then measuring the Voltage drop across the resistance. The Voltage is directly proportional to the current as given in ohms law: E = I x R If you are measuring the resistance through the ammeter it will have a very low resistance and impedance.
What is An example of a short circuit?
A short circuit is one that is characterized by extremely low resistance. This will result in the extremely dramatic increase of current. High current will flow until a safety device opens the circuit, or the weakest link in it burns out. And one of the two usually occurs in a moment or two.==Short Circuit happens when the cables of the electrical appliances are worn out or it's not connected properly,a short circuit may occure.A short circuit has a very low resistance that almost all electric current flow through it.It'll affect the operation of the electrical appliances.Owing to the heating effect,the excess electric current would produce a large amount of heat,wihout a fuse or a circuit breaker,a fire may be occured when there's a short circuit.
How does tubelight on a vendors cart works?
a short circuit is brought about when short cut is provided for the current flowing there a as a result current bulb up the dangerous the electro-magnet coils are clus wonder and there is a chance of short circuit hence wire is to be inssulated so no electric currrent stops across and no short curict will be produced
How do you know when your circuit works?
You know your circuit works when it does what you designed it to do, and prefferably as little else as possible.
What is schematic circuit?
a schematic circuit is a diagram that show you how a particular circuit works
Why does a circuit work?
It works with a connected wire and all the components inside a circuit.
You hane an ampmeter in the dashboard of your john deere tractor 317 and need to know how to connect it?
The ammeter on the JD 317 picks up the electric field to operate from the red wire connected between the circuit breaker and the ignition switch. It simply snaps into a grove on the back side of the ammeter. It does not take much to pull it free from the meter, but it is easy to fix. If it works backwards after snapping it in place, you need to pull it out and re-insert it the other way (reverse direction).
Working of ammeter?
An ammeters works as a tool for measuring electric current in amperes. It was named after French scientist Andre-Marie Ampere.
Is a circuit Protection device made from special metals that shut off a switch if too much current flows through a circuit and there is a risk of overloading or overheating the circuit?
The (only) protection device which works like that is a fuse. It is simply a short length of metal which melts when too much current flows through it.
How a switch works when it is on and off?
The basic answer is that when it is off, the circuit is broken, when it is on, the circuit is complete. Example: _/_ is off ___ is on
