Relative error...

hello. i've got a few simple questions -

does "R" mean 'our' ?

what does that mean "R voltmeter is 100 ohms" ?

* a voltmeter is a testing instrument that measures voltage.

* ohms are a unit of measure of electrical resistance.

what are you working on or trying to figure out ?

R means "resistance"

i need to know (theoratical) how bi could be relative error if i measure this circuit...in my calculations its 1%

I am getting just less than 10%, how much less, calculate (I did it) but the calculation in your home work must be done by you.

Gust, just give me hints to do it, thats all what i am asking :)

OK, the 10 ohm resistance is not free standing. There are other resistances. Connect the circuit, (draw it) - including equivalent resistance of voltmeter- in series, parallel, however it is to be connected. ( then put voltage drop across each element- or at least the equivalent resistance of the voltmeter). That is the reading read by volt meter

Use the KCL and KVL as required.

i understand the whole voltage (E), amperage (I) and resistance (R) thing.

the way you've worded your question(s) have something to be desired.

check this site out for your answer(s). they've got an area specifically for electrical circuit related homework questions

good luck.

As previously indicated, the error of additional portions of the circuit will contribute, but you also need to know the relative errors of the instruments themselves.

Whether homework, or real world challenge, drawing the circuit and understanding the relationships of the voltages and current flow will mean that you learn the process rather then just "obtain" the answer.

The circuit is simple, but I will give you a hint. The leakage current through the meter will influence the apparent current for the total circuit.

The impedance of the voltmeter is more likely to be 100k ohm not 100ohm.

Should be MΩ actually but to have magnified effect of error the prof must have put a low value.

I just threw away a perfectly good 100k multimeter. I've used 1000Ω standalones. FETs made all that stuff about as useless as the missus' birth control pills.