a sudden movement or leap to avoid a thrust. Last 300 years. The greater the voltage, the greater the flow of electrical current (that is, the quantity of charge carriers that pass a fixed point per unit of time) through a conducting or semiconducting medium for a given resistance to the flow.

Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. All rights reserved. One volt is equivalent to one joule per coulomb. the derived SI unit of electric potential; the potential difference between two points on a conductor carrying a current of 1 ampere, when the power dissipated between these points is 1 watt, a small circle of determined size executed in dressage, a leap made in fencing to avoid an opponent's thrust. Current is the rate at which charge is flowing. A voltage difference of one volt drives one ampere of current through a conductor that has a resistance of one ohm. 150–151; Junge, pp. Resistance is a material's tendency to resist the flow of charge (current). For the Josephson constant, KJ = 2e/h (where e is the elementary charge and h is the Planck constant), a "conventional" value KJ-90 = 0.4835979 GHz/μV was used for the purpose of defining the volt. A voltage difference of one volt drives one ampere of current through a conductor that has a resistance of one ohm. Alessandro Volta. One joule of work is required to move an electric charge of one coulomb across a potential difference of one volt. Webster’s New World College Dictionary, 4th Edition. voltage synonyms, voltage pronunciation, voltage translation, English dictionary definition of voltage. A neat analogy to help understand these terms is a system of plumbing pipes.

Advertisement. Our new online dictionaries for schools provide a safe and appropriate environment for children. Volt Definition: The amount of work done expressed in joule in bringing 1 coulomb of charge, starting from any point of an electric circuit and transversing the entire circuit including the cell and back to the same point is equal to the electromotive force expressed in volt. The SI derived unit used to measure electric potential at a given point, usually a point in an electric circuit. It can be expressed in terms of SI base units (m, kg, s, and A) as: Room temperature thermal energy of a molecule..................................0.04 eV, Visible light photons...........................................................................1.5-3.5 eV, Energy for the dissociation of an NaCl molecule into Na+ and Cl- ions:.............................................................................................4.2 eV, Ionization energy of atomic hydrogen ...................................................13.6 eV, Approximate energy of an electron striking a color television screen (CRT display) ...............................................................................20,000 eV, High energy diagnostic medical x-ray photons..................200,000 eV (=0.2 MeV), Typical energies from nuclear decay: (1) gamma..................................................................................0-3 MeV (2) beta.......................................................................................0-3 MeV (3) alpha......................................................................................2-10 MeV, Cosmic ray energies ...........................................................1 MeV - 1000 TeV. [13] They made the volt equal to 108 cgs units of voltage, the cgs system at the time being the customary system of units in science. So, when we talk about these values, we're really describing the movement of charge, and thus, the behavior of electrons. Like mechanical potential energy, the zero of potential can be chosen at any point, so the difference in voltage is the quantity which is physically meaningful. Amaze your friends with your new-found knowledge! Voltage. We have almost 200 lists of words from topics as varied as types of butterflies, jackets, currencies, vegetables and knots!

The motional emf expression is an application of Faraday's Law, as can be seen from: Used to express conservation of energy around a circuit in the.