If the meter is given to you how do you find whether the given one is ammeter or voltmeter? The meter doesn't have any scale marking on it... you have only the meter box... how do u find out...
2007-05-09 23:50:32 · 7 answers · asked by venkat r 1 in Science & Mathematics ➔ Engineering
voitmeter measure circult
ampmeter measure current.
you want 2in 1 meter check with FUKE
2007-05-10 03:14:08 · answer #1 · answered by jeffrey b 4 · 0⤊ 1⤋
I think:-
Short out the terminals and see how the meter needle responds when the entire meter is rotated swiftly.
An ammeter has a low internal resistance and will not be adversly affected by a short on its terminals but a voltmeter must have a high resistance and a short on its terminals will cause the meter needle to be damped when the meter itself is moved - due to the back emf generated.
2007-05-10 00:09:35 · answer #2 · answered by tharmy 1 · 1⤊ 0⤋
The ammeter will have shunt resistance across it terminal. In volt meter you may find resistance in serious connection. The volt is measured by keeping the terminals at positive and negative or phase and neutral as the case may be. But the ammeter you have to give one supply at one end of the meter and take the supply out from the other terminal that is it has to be fixed in serious connection.
2007-05-10 00:02:25 · answer #3 · answered by A.Ganapathy India 7 · 0⤊ 0⤋
An Amp meter has a very low internal resistance, and a Volt meter has a relatively high one.
If you have an Ohm meter on hand, you can measure this. If the resistance of your meter in question is almost Zero, then it is likely an Amp meter.
2007-05-10 00:14:19 · answer #4 · answered by Marianna 6 · 1⤊ 0⤋
The voltmeter will read 4.5 volts in all cases. The ammeter will read 1.5 amps for the 3 ohm resistor (4.5/3), 0.75 amps for the 6 ohm resistor (4.5/6), 0.5 amps for the 9 ohm resistor (4.5/9), 0.375 amps for the 12 ohm resistor (4.5/12), and 0.3 amps for the 15 ohm resistor (4.5/15). The ammeter has 0 ohms internal resistance there will be 0 volts dropped across the ammeter. Use ohms law I = V/R with V = 4.5 Volts to calculate the current through the resistors.
2016-04-01 04:57:09 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Voltmeters work in parallel to the circuit, ampmeters usually must be connected in series.
2007-05-09 23:57:23 · answer #6 · answered by Randy G 7 · 0⤊ 0⤋
why would you first of all want to use any meter that does't have a scale ?
2007-05-10 00:00:17 · answer #7 · answered by good_fatrabbit 3 · 0⤊ 0⤋