Ohm’s Law

The fundamental relationship between voltage, current, and resistance in a circuit.

$V=I\times R$

Where:

• V = Voltage (Volts)
• I = Current (Amperes)
• R = Resistance (Ohms)

Derived: I = V/R, R = V/I

Application: calculating LED resistors — R = V_resistor / I_LED

See Also

• Electronics and Circuitry topic