Science
Ohm's law.
Definition
Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to its resistance. It is the fundamental relationship used to analyze electrical circuits.
Examples
Real-world.
- 1 A 12V battery connected to a 4Ω resistor produces a current of 3A
- 2 Increasing the resistance in a circuit (like using a longer wire) decreases the current if voltage stays the same
- 3 Electricians use Ohm's law to determine the correct wire gauge needed for a given appliance
Key Fact
V = IR, where V is voltage (volts), I is current (amps), and R is resistance (ohms).