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Ohm's law has been observed on a wide range of length scales. In the early 20th century, it was thought that Ohm's law would fail at the atomic scale, but experiments have not borne out this expectation. As of 2012, researchers have demonstrated that Ohm's law works for silicon wires as small as four atoms wide and one atom high. [17]
A Magic Triangle image mnemonic - when the terms of Ohm's law are arranged in this configuration, covering the unknown gives the formula in terms of the remaining parameters. It can be adapted to similar equations e.g. F = ma, v = fλ, E = mcΔT, V = π r 2 h and τ = rF sinθ.
The Odum–Pinkerton approach to Lotka's proposal was to apply Ohm's law – and the associated maximum power theorem (a result in electrical power systems) – to ecological systems. Odum and Pinkerton defined "power" in electronic terms as the rate of work , where Work is understood as a " useful energy transformation".
The formula is a combination of Ohm's law and Joule's law: = = =, where P is the power, R is the resistance, V is the voltage across the resistor, and I is the current through the resistor. A linear resistor has a constant resistance value over all applied voltages or currents; many practical resistors are linear over a useful range of currents.
Ohm's law: Electronics: Georg Ohm: Osipkov–Merritt model: Astrophysics: Leonid Osipkov, David Merritt: Ostwald dilution law: Physical chemistry: Wilhelm Ostwald: Paley–Wiener theorem: Mathematics: Raymond Paley and Norbert Wiener: Pareto distribution Pareto efficiency Pareto index Pareto principle: Economics: Vilfredo Pareto: Pascal's law ...
An ohmic contact is a non-rectifying electrical junction: a junction between two conductors that has a linear current–voltage (I–V) curve as with Ohm's law.Low-resistance ohmic contacts are used to allow charge to flow easily in both directions between the two conductors, without blocking due to rectification or excess power dissipation due to voltage thresholds.
A 2008 review paper written by Philips researcher Clemens J. M. Lasance notes that: "Although there is an analogy between heat flow by conduction (Fourier's law) and the flow of an electric current (Ohm’s law), the corresponding physical properties of thermal conductivity and electrical conductivity conspire to make the behavior of heat flow ...
[10] The term "scientific law" is traditionally associated with the natural sciences, though the social sciences also contain laws. [11] For example, Zipf's law is a law in the social sciences which is based on mathematical statistics. In these cases, laws may describe general trends or expected behaviors rather than being absolutes.