variability of MM?

When
I did the paper resistor with a paper clip in the center, the readings
fluctuated wildly--from 181 to 199, and then it would go down to 1.0 and
again. Why could this be? But I did get the changes by moving the
center paper clpi. In fact my multimeter fluctuates a lot anyway.


randofo18 days ago

It could be the meter, the contact between the probe and the potentiometer, or just the fact that drawing a resistor onto a piece of paper like that is not that accurate.

Electricity will follow the path of least resistance, and it is possible that a hand drawn resistor has multiple possible paths of resistance which fluctuate due to all kinds of microscopic differences in the drawing you can't see.

paulhschulman (author)  randofo18 days ago

Thanks for responding so quickly. I'll check this out. I hoped to learn from the project but they are not here. You direct us to a whole list of projects but I can't tell which are relevant to resistors