Electronics Engineering
Electrical Engineering

What are the disadvantages of using ammeter and voltmeter?

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Wiki User
December 17, 2009 4:18AM

The disadvantage of using a voltmeter and ammeter on circuit measurements is that internal burden in both these instruments can affect circuit operation so much as to make a measurement useless.

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to calibrate voltmeter and ammeter using potentiometer

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What is the definition of voltmeter-ammeter method?

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You cannot convert an ammeter into a voltmeter.

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Ammeter measures current and Voltmeter measures volts

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An ammeter is connected in series and a voltmeter is attached in parallel.

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An ammeter can be converted into a voltmeter by connecting a resistor in series with it. This works best if the ammeter is a very sensitive ammeter, such as in the micro ampere range. More commonly, a voltmeter (or sensitive ammeter) is converted into an ammeter by placing a small resistor in parallel with it.

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Connect ammeter in series and voltmeter in parallel to the circuit

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The voltmeter is connected across the supply and the ammeter is connected in series with the supply.

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Multi-range ammeter using universal shunt

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If the voltmeter was ahead of the ammeter, the voltmeter would read supply voltage, and the ammeter would read current through the voltmeter, a very small reading. If the ammeter was ahead of the voltmeter, the ammeter would read supply current, which is probably many times in excess of the ammeter's rating, so you would either destroy the ammeter (or battery) or blow its fuse. It does not matter about the voltmeter, as the ammeter is now blown.

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No. Voltmeter in parallel. Ammeter in series.

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the voltmeter is connected across the supply and the ammeter is connected in series with the supply

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voltmeter in parallel and ammeter in series of a circuit.

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The ammeter would be destroyed by excessive current but nothing would happen to the voltmeter

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the ammeter is put in series in the circuit ... and the voltmeter in parallel with what's you're measuring

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Using an ammeter. You can use a voltmeter to find out how many volts there is.

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The difference is that the voltmeter is a lulu

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we can measure the resistance of the motor by using voltmeter ammeter method of by directly using a multimeter across the armature terminals of the motor in voltmeter ammeter method we should use a less value of dc voltage to find the resistance

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An ideal voltmeter has infinite resistance, while an ideal ammeter has zero resistance.

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An ammeter has a very low resistance, and a voltmeter has a very high resistance. So the ammeter will short circuit the supply, while the voltmeter will significantly increase the resistance of the load.

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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.

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to check the accuracy of voltmeter with the help of potentiometer

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An ammeter measures current while a voltmeter measures voltage An ammeter is always connected in series while a voltmeter is connected in parallel To convert a galvanometer into an ammeter, a shunt (very small resistance) must be connected parallel to the galvanometer coil. To convert a galvanometer into a voltmeter, a large resistance must be connected in series with the galvanometer coil.

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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.

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The ammeter will almost certainly blow its fuse.