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inductance

(Encyclopedia)inductance, quantity that measures the electromagnetic induction of an electric circuit component; it is a property of the component itself rather than of the circuit as a whole. The self-inductance, ...

resistance, in electricity

(Encyclopedia)resistance, property of an electric conductor by which it opposes a flow of electricity and dissipates electrical energy away from the circuit, usually as heat. Optimum resistance is provided by a con...

Johnson, Herschel Vespasian

(Encyclopedia)Johnson, Herschel Vespasian, 1812–80, U.S. political leader, b. Burke co., Ga. Admitted to the bar in 1834, he filled (1848–49) an unexpired Senate term before serving as circuit court judge (1849...

Eggleston, Edward

(Encyclopedia)Eggleston, Edward, 1837–1902, American author, Methodist clergyman, b. Vevay, Ind., educated in frontier schools. Before 1870 he was a Bible agent, a farm worker, a circuit rider in Minnesota and In...

virtual observatory

(Encyclopedia)virtual observatory, a collection of integrated astronomical data archives and software tools that utilize computer networks to create an environment in which research can be conducted. Several countr...

induction, in electricity and magnetism

(Encyclopedia)induction, in electricity and magnetism, common name for three distinct phenomena. Electromagnetic induction is the production of an electromotive force (emf) in a conductor as a result of a changing ...

automatic tuning control

(Encyclopedia)automatic tuning control (ATC), method or device to keep a radio or television receiver automatically tuned to a desired frequency or channel. Assuming that the receiver is at least approximately tune...

Davis, David

(Encyclopedia)Davis, David, 1815–86, American jurist, associate justice of the U.S. Supreme Court (1862–77), b. Cecil co., Md., grad. Kenyon College, 1832; cousin of Henry Winter Davis. In 1836 he settled as a ...

Oklahoma State University

(Encyclopedia)Oklahoma State University, at Stillwater; land-grant and state supported; coeducational; chartered 1890, opened 1891 as Oklahoma Agricultural and Mechanical College, renamed 1957. It has centers for l...

inductor

(Encyclopedia)inductor, electric device consisting of one or more turns of wire and typically having two terminals. An inductor is usually connected into a circuit in order to raise the inductance to a desired valu...