How do you calculate current through a 6-ohm resistor using Ohm's law?

Ohm's Law: I = V / R

Example (V = 12 V, R = 6 Ω): I = 12 / 6 = 2 A

If V = 6 V: I = 6 / 6 = 1 A

Memory aid (Ohm's Law triangle):

 [ V ]
 -------
 I | R

Cover the unknown to find the formula.

Current through any resistor is found using I = V/R; for a 6-ohm resistor at 12 V, the current is 2 amperes.