Ohm’s Law

Ohm’s Law

Ohm’s law relates the voltage drop across a resistor to the current flow through that resistor. It is usually shown as:

E = I · R

where E is voltage in volts, I is current in amperes and R is resistance in ohms.

If you have a 50 pA current and 20 kohm of resistance,

E = 5x10^-11 · 2x10⁴ = 1x10^-6

The voltage drop is 1 µV.

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Last revised on Thursday, August 30, 2007