Is it possible to measure current that is flowing for 2 or 3 milliseconds inside a circuit through oscilloscope by measuring the voltage drop across a resistor ?
The supply voltage is generated by triboelectricity and it has a peak to peak of around 5 volts, it lasts only for about 3 to 7 milliseconds. I have connected this to two resistors in series, (10 Ohm, 10 Ohm) and i measure the open circuit voltage that is generated by triboelectric impact and the voltage drop across the first resistor to find the current in the circuit. So they are connected to two channels in oscilloscope (Voltage probe, 1x attenuation, probes are compensated)
But, it turns out that i see nothing in the oscilloscope, i cannot measure the the tribo electric voltage as well the voltage drop across first resistor.
When the two resistances are very high, say 100 Kilo Ohms, i see that both the channels in oscilloscope show the same open circuit voltage that is generated by triboelectricity during impact. How can i measure current ?