Ohm's Law for a Circuit Component
The current passing through a section of a circuit is proportional to the voltage across the ends of that section and inversely proportional to the resistance of the section:
$$I=\frac{U}{R}$$
where,
I— current passing through the circuit component in amperes (A);
U— voltage in volts (V);
R— resistance of the circuit section in ohms (Ω).
Frequently asked questions
What does Ohm's law state?
Ohm's law states that current is equal to voltage divided by resistance in a circuit section.
How do you calculate current with Ohm's law?
Divide the voltage across the component by its resistance.
What units are used in Ohm's law?
Current is measured in amperes, voltage in volts, and resistance in ohms.
