When I read tutorials about internal resistor of input pin, I encountered many issues. But the main problem is here. If I can explain this one, all will be cleared.
As we know, V=E-IR (*) ( Ohm’law applied in whole circuit)
When no current flow(open circuit) U and E will be the same
But I made 2 experiments and realized that that is not true
4 pictures following are my result.
First: Experiment on lipo (test voltage with and without 1K resistor)
Second: Experiment on 9v battery(with and without 1k resistor, too)
According to (*), voltage will be the same before and after i add 1k reistor, but the result is not my desire.
So explain to me, thanks in advance