Ohm's law

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The law stating that the direct current flowing in a conductor is directly proportional to the potential difference between its ends. It is usually formulated as V = IR, where V is the potential difference, or voltage, I is the current, and R is the resistance of the conductor.

from The Century Dictionary.

• noun See law.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun physics Ohm's observation that the direct current flowing in an electrical circuit consisting only of resistances is directly proportional to the voltage applied.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun electric current is directly proportional to voltage and inversely proportional to resistance; I = E/R