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An ammeter measures the voltage across a resistor with a known value, and
from that it calculates the current through the resistor. The resistor has to be
a very small value, so that it doesn't change the current in the circuit by being
placed in line with it.
If you really want to do this, then you need a resistor made for the purpose,
with a resistance of not more than 1 ohm. You can buy one, or maybe roll up
a big ball of insulated wire that has a resistance of 1/2 or 3/4 ohm. (How you
would measure that accurately is another question.) When you have that
fractional-ohm resistor, connect the voltmeter across its ends, and you have
your ammeter. To use it, open (break) the circuit whose current you want to
measure, and connect your meter into the hole. Read the voltmeter. The
current passing through your resistor is
(the voltmeter reading) divided by (the resistance of your resistor).
There are other design details to consider, which we won't go into at this time.
If you actually try this, don't use it to measure currents greater than maybe
1 Ampere. How will you know the current before you've measured it ? That's
exactly the appropriate question. The answer is: Experience. If you haven't
got it, then maybe you shouldn't be building your own test equipment yet.
What else can I help you with?
Voltmeter in series?
No. Voltmeter in parallel. Ammeter in series.
How should a ammeter and voltmeter be connected in circuit?
Ammeter is coneccted in series with circuit but Voltmeter is connected in parallel.
How can you say that ammeter measures current and voltmeter measures voltage?
voltmeter in parallel and ammeter in series of a circuit.
How do you connect an ammeter and voltmeter?
To connect an ammeter, you must place it in series with the circuit so that the current flows through the ammeter. To connect a voltmeter, you must place it in parallel with the component you are measuring the voltage across. Make sure to set the ammeter and voltmeter to the proper range before connecting them.
How is voltmeter connected to ammeter?
in series
Why do you have specific resistance combination inside a voltmeter and an ammeter Explain?
in voltmeter we have internal Resistance and connected in series , to current don't transfer in voltmeter , and we have internal resistance in ammeter and connected in parallel , to most current transfer through the ammeter.
High resistance in parallel connected with galvanometer to form voltmeter?
That won't work. To convert an ammeter (a galvanometer is a very sensitive type of ammeter) you connect a high value resistor in series with it.
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.
What is instrument specially designed to measure voltage?
The Ammeter XD
Will the rusting of nails in a sodium chloride - water solution effect the reading off a voltmeter or ammeter?
An ammeter or a voltmeter gives the reading of the flow of current, which is due to the movements of ions. When a rusted nail is immersed in the solution it will add the no of ions into the solution. This will increase the ion concentration and therefore will change the reading of a voltmeter and ammeter.
How is the connection of the PN junction diode?
battery +ive ----> volteter +ive voltmeter +ive ----> diode +ive diode -ive ----> ammeter +ive ammeter -ive ----> voltmeter -ive voltmeter -ive ----> battery -ive
Can a multimeter be used as substitute of ammeter and voltmeter why?
yes it can read both ac and dc voltage and current .AnswerThe whole point of a multimeter is that it can perform the function of an ammeter, a voltmeter, and an ohmmeter!
