Join our online live tuition classes at Buzztutor.com

Formula for Ohm's Law

According to Ohm's Law electric potential difference(V) is directly proportional to the product of the current(I) times the resistance(R).

V = I R

The relationship between power (P) and current and voltage is

P = I V

Using the equations above we can also write

P = V² / R

and

P = I² R