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volt

(Encyclopedia)volt [for Alessandro Volta], abbr. V, unit of electric potential and electromotive force. It is defined as the difference of electric potential existing across the ends of a conductor carrying a const...

Wheatstone, Sir Charles

(Encyclopedia)Wheatstone, Sir Charles hwētˈstōn, –stən [key], 1802–75, English physicist and inventor. He was professor at King's College, London, from 1834. A pioneer in telegraphy, he was coinventor with ...

power, in physics

(Encyclopedia)power, in physics, time rate of doing work or of producing or expending energy. The unit of power based on the English units of measurement is the horsepower, devised for describing mechanical power b...

cell, in electricity

(Encyclopedia)cell: see battery, electric.

dry cell

(Encyclopedia)dry cell: see battery, electric. ...

storage battery

(Encyclopedia)storage battery: see battery, electric. ...

solvent

(Encyclopedia)solvent, constituent of a solution that acts as a dissolving agent. In solutions of solids or gases in a liquid, the liquid is the solvent. In all other solutions (i.e., liquids in liquids or solids i...

alkaline dry cell

(Encyclopedia)alkaline dry cell: see battery, electric. ...

reactive power

(Encyclopedia)reactive power: see power, electric. ...

guitar

(Encyclopedia)guitar, musical instrument related to the lute, modern guitars normally having six strings that are plucked with the fingers or strummed with a pick. Earlier versions had pairs of strings like the lut...