Technical Education Department

The Harris-Tech Zone

 

Ohms Law

Electric current is directly proportional to voltage and inversely proportional to resistance; I = E/R.

 

 

The law was named after Georg Ohm, who stated that the voltage drop "V" across a resistor "R" is proportional to the current. In electricity, current is any flow of charge, usually through a metal wire or some other electrical conductor, with current running through it.

V = IR where the proportionality constant R is the electrical resistance of the device.

 

Electrical resistance is the ratio of the potential difference (ex. voltage) across an electric component (such as a resistor) to the current passing through it

:R=V/I, where V is the voltage and I the current