Voltage and Length Question!?!
Measuring the voltage across a sheet of conductive paper by using a probe and then reading of the voltmeter, from lengths between 2 - 26cm (I went up in 2cm intervals). I then drew a graph of my results and got a positive gradient straight line, and the voltage was 0 (V0) at 14cm, and now have the following questions:
1) If lower emf was used, what would happen to the gradient of your graph and the length at which V = 0?
Answers:
I need more description of just how
the voltage was applied to the sheet
of conductive paper in order to get + & - voltage readings?
If it were done by placing a known EMF source across the
entire length of sheet and then measuring voltage from one
end - there would be no change of sign of voltage.
Anyway the one thing that can be easily determined is the slope (gradient)
of the straight line graph IF the EMF were lowered. The slope would become
less accordingly. <= ANS
Probably the 0 point wouldn't change if the EMF is lowered since just the
slope of the straight line graph would change - it would still go thru point of
0 voltage at 14 cm.
Too much information missing.
Lower EMF used where? It's obvious you have some voltage source, but not obvious how it is connected in relation to the paper or the voltmeter, nor can I guess why there's a place where the voltage is 0 without knowing the setup.
I'll never understand why people think an experiment can be analyzed long distance without any information.
