Voltmeters, Ammeters, Galvanometers, and Shunt Resistors - DC Circuits Physics Problems

This physics video tutorial provides a basic introduction into ammeters and voltmeters. Ammeters measure the electric current flowing in a circuit in amps and voltmeters measure the voltage across an element in volts. To use an ammeter, you should connect it in series with the circuit since the internal resistance of an ammeter is very close to zero. To use a voltmeter, you should connect it in parallel to the element or device of which you wish to measure the voltage across. Voltmeters have an internal resistance that is very high ideally near to infinity. This video contains examples and practice problems of calculating the shunt resistance needed to convert a galvanometer into an ammeter and into a voltmeter.
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Analog Ammeters:
amzn.to/3yW9JMD
Digital Multimeters:
amzn.to/3kgz28b
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Thank you for keeping it simple and greate explanation! Especially was really usfull to show, which parts the Ammeter is made of (you framed it with blue colour in your vid). Perfect!
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You did not explain what a galvanometer is before the first problem

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Sensitive ammeter. Flicks back and forth depending on current. Used for capacitors and to show the effects of Faradays and lenzs law.

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[@nxxpluto1191]

I’m not sure if my textbook is outdated but in it says that the ammeter is attached parallel to the galvanometer and that the voltmeter is attached in series with it so I’m now even more confused

[@AhmedMahmoud-tv9vw]

in an ammeter, The shunt resistor is parallel to the galvanometer.
while in a voltmeter, the multiplier resistor is connected in series in the galvanometer.

[@ahmad138]

Your book isn't outdated.. it has got some typing errors... In an ammeter, Shunt is connected in parallel with the galvanometer(not ammeter connected across galvanometer as your book puts it)....Similarly, in a voltmeter, shunt in connected in parallel with galvanometer (not voltmeter in series with galvanometer)

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sir, why resistance is zero in series& infinity in parallel

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krish Anu when you’re using an Ammeter to measure current, you DONT want the measuring device to alter the current, hence little to no resistance. (Zero resistance in series)

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Sir is galvanometer connected in parallel or in series

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Internal resistor in series with Galvanometer whereas a shunt resistor in parallel with the galvanometer, as i understood

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I*I*R = Wats. If you know the load resistance you change the scale of your (galvano) meter.

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