Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Ohms are units used to measure electrical resistance, named after German physicist Georg Simon Ohm who formulated Ohm's Law relating voltage, current, and resistance.
A fundamental relationship in electricity that states the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to its resistance.
Superconductivity: The phenomenon where certain materials exhibit zero electrical resistance at very low temperatures.
Kilohms (kΩ) and Megohms (MΩ): Units used to measure large values of resistance, where 1 kilohm equals 1000 ohms and 1 megohm equals 1,000,000 ohms.