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direct current
noun
- Electricity. an electric current of constant direction, having a magnitude that does not vary or varies only slightly. : dc
direct current
noun
- a continuous electric current that flows in one direction only, without substantial variation in magnitude DC Compare alternating current
direct current
- An electric current that moves in one direction with constant strength. Batteries are a source of direct current. Direct current is not used for long-distance power transmission because it is difficult to step up the voltage to a level that is efficient for energy transfer and then to step the voltage back down again for safe domestic use.
- Compare alternating currentSee Notes at current
direct current
- The electric current (see also current ) in which the electrons flow in one direction only. ( Compare alternating current (AC) .)
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Notes
DC is usually supplied by batteries .
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Other Word Forms
- 徱·-ܰ۱Գ adjective
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Word History and Origins
Origin of direct current1
First recorded in 1885–90
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Compare Meanings
How does direct current compare to similar and commonly confused words? Explore the most common comparisons:
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