# Ohm's law

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Related to Ohm's law: Kirchoff's Law

## Ohm's law

[ōmz]
a mathematical relationship formulated by the German physicist Georg Simon Ohm in 1826, comparing voltage (V), current (I), and resistance (R), usable for either alternating current or direct current. It originally applied only to situations of steady direct current, with the formula V = IR; with alternating current, the electrical circuit contains resistors, inductors, and capacitors and the formula becomes V = IZ, where Z is a complex number representing the impedance.

## Ohm's law

Etymology: Georg S. Ohm
the principle that the strength or intensity of an unvarying electric current is directly proportional to the electromotive force and inversely proportional to the resistance of the circuit.

## Ohm's law

(omz)
[Georg S. Ohm, Ger. physicist, 1789–1854]
The strength of an electric current, expressed in amperes, is equal to the electromotive force, expressed in volts, divided by the resistance, expressed in ohms (V=IR).
See: electricity

## Ohm's law

the electric current flowing through a conductor is equal to the voltage divided by the resistance.
References in periodicals archive ?
Self-questioning during problem solving may hold promise for enhancing student performance, but no studies have examined its use in the context of secondary-level career and technical education programs teaching physics principals such as Ohm's Law.
As illustrated in FIGURE 2, Ohm's Law relates conduction current to voltage drop, and at DC, the relation coefficient is a constant representing the resistance of the conductor.
Although the low voltage characteristics appear to follow Ohm's law, the higher voltage power-law characteristics are consistent with space-charge-limited emission.
This site allows students to derive Ohm's law from experimental trial and error using different components of a "virtual" circuit.
Calculations of transnasal resistance were made according to Ohm's law.
Math skills are required in the exercises using Ohm's Law and Kirchoff's Law.
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If the circuit design is 100% electrical, and voltages and currents are all you're interested in, Spice is usually an adequate modeling answer, though there are better and more informative ways to tackle Ohm's law.
This allows the current reading to be determined by the simple application of Ohm's Law so that the meter's scale can be directly calibrated in Amps.
He covers electrostatics, currents and Ohm's law, magnetostatics, electromagnetic fields changing in time, transmission lines: methods of the Laplace transformation, electromagnetodynamics of moving bodies, electromagnetic wave propagation, and the scattering problem.
Beginning with electron theory and Ohm's law, the work covers topics such as series and parallel circuits, energy and power, batteries, conductors and wire sizes, conductor properties, electromagnetism, DC motor principles, switching controls, and remote systems for lighting control.
Ignorance of the exact constraint methodology is detrimental to a mechanical engineer as much as not knowing Ohm's law is to an electrical engineer.

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