Electronics/Ohm's Law

Ohm's law describes the relationship between voltage, current, and resistance.

Voltage and current are related such that voltage is equal to current times resistance: $$V = I \cdot R$$

Common units used in electronics calculations are:

V = mA &times; k&Omega;



the current going through any point in the circuit, I, will be equal to the voltage V divided by the resistance R.



In this example, the voltage across the resistor, V, will be equal to the supplied current, I, times the resistance R.

SUMMARY:
 * V=I times R
 * I=V divided by R
 * R=V divided by I