Recently wondered why, so decided to ask you lot :)
2007-05-21 09:19:38 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Physics
It's due to the differences in the components inside of the meters. Longer or thicker wiring can change the readings. Not to mention all of the other parts and their manufacturing process.
2007-05-21 09:27:59 · answer #1 · answered by mad_mike_j 4 · 0⤊ 1⤋
Measurement errors are one possibility and variations in the voltage source is another. How do we know that the voltage is really same at different times? Unless you are using a standard voltage source, that would be one factor. The other factor will of course be the variation in the different voltmeters. Lack of precision and zero error are the two to look for.
Lack of precision comes up when the same meter gives different readings on different measurements.
Difference between two meters is the bias error also called zero error.
Range errors are another factor. That is to say 0 to 10 V may be calibrated as 9 V in one case and 11 V in another case. Here, precision and zero error are not present.
Of course, all the above factors may be present!
2007-05-21 09:39:53 · answer #2 · answered by Swamy 7 · 0⤊ 0⤋
Alex. in case you place the resistor at present around the battery, the two certainly one of them, and then study the voltage, you're easily examining at present around the battery terminals. to verify the resistor result, use 2 resistors, and degree for the duration of purely certainly one of them. you additionally can positioned a resistor in sequence with a million lead of a LED. connect the different lead, observing polarity, of direction, of the introduced approximately the right battery terminal, and the different lead of the resistor to the different battery terminal. Now study the voltage around the LED leads. the only way which you will see any form of modern indication out of your meter is to place it in the Amps variety (Milli-Amps) and connect the meter in sequence with the battery and resistor. look heavily at your till now efforts. the place did you connect the resistor around the battery, and the place did you place the meter leads. have been the meter leads, electrically, around the battery? specific they have been and the only thank you to verify an result from the resistor is to go away each and everything related mutually as the resistor slowly pulls the battery voltage down, as a results of fact the resistor discharges the battery.
2016-12-11 16:16:12 · answer #3 · answered by yasmin 4 · 0⤊ 0⤋
A voltmeter should ideally have an infinite resistance...
It never has. Differences arise from the resistance's magnitude.
2007-05-21 09:38:37 · answer #4 · answered by misiekram 3 · 0⤊ 0⤋
Two voltmeters conected in parallel should
always give equal readings within their specified
accuracy. If they do not, it's called malfuncion.
2007-05-21 09:50:33 · answer #5 · answered by Alexander 6 · 0⤊ 0⤋
lots of things are actually very different, like the wire size the insulation resistance, if the meter leads have been damaged. the tollarences in the resistors of each type. best bet is to lick the wire to test it......JK GOD jk lol
2007-05-21 09:34:12 · answer #6 · answered by Ty 3 · 0⤊ 0⤋
The readings should be the same.
2007-05-25 05:33:05 · answer #7 · answered by johnandeileen2000 7 · 0⤊ 0⤋
...using different scales ?
2007-05-21 09:26:57 · answer #8 · answered by Anonymous · 0⤊ 0⤋