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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.
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An ammeter and voltage range are measure the current and voltage electric lamp if mistake meter interchange what will happen?
1. Voltmeter has high impedance and hence will restrict the current severely.a) Electric Bulb will not glowb) The Ammeter will just measure the current that Voltmeter allows and since this current is much smaller than actual current nothing will happen to ammeter.c) The Voltmeter will measure the Voltage that is being applied.d) This will allow you to measure the resistance of the Voltmeter.VR=V/I
What instrument is used to measure the amount of electricity flowing through a circuit?
An ampermeter. -- voltmeter-- ammeter-- ohmmeter-- wattmeter-- frequency counterWe can't "measure electricity" unless we figure out what we are measuring. The difference of electrical potential is measured in units called volts, and a voltmeter is used to do that. The amount of electrical current flow is measured in units called amps (amperes), and an ammeter is used to for that purpose. A multimeter combines the functions of these two meters, and will most often include some other features to measure some other electrical characteristics. An example of another measuring function of a multimeter might be its use as an ohmmeter for measuring electrical resistance.im so bored
What is an instrument for measuring the properties of and electrical circuit?
As there are multiple properties of an electrical circuit that can be metered or tested then a multimeter would be useful
What is instrumental power?
It could refer to the small amount of electrical power absorbed by an instrument like a voltmeter or ammeter, or alternatively it could refer to power which is instrumental in achieving some desired objective.
What is an ideal ammeter?
an ideal ammeter will have zero resistance
How do you connect an ammeter and voltmeter?
The voltmeter is connected across the supply and the ammeter is connected in series with the supply.
Voltmeter in series?
No. Voltmeter in parallel. Ammeter in series.
How can you say that ammeter measures current and voltmeter measures voltage?
voltmeter in parallel and ammeter in series of a circuit.
How should a ammeter and voltmeter be connected in circuit?
Ammeter is coneccted in series with circuit but Voltmeter is connected in parallel.
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
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!
What is the calibration of ammeter?
An ammeter should not be used as a voltmeter. An ammeter is a low impedance device that measures the current going through a circuit, often by measuring the small voltage across a known resistance. A voltmeter is a high impedance device that measures the voltage across a circuit. If you were to connect an ammeter as if it were a voltmeter, you would effectively short out the circuit, drastically affecting its operation, and potentially damaging both the circuit and the ammeter.
