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direct current
(redirected from Galvanic current)

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direct current

Electric current in which the electrons (negative charge) flow in one direction, and that does not reverse its flow as alternating current does. The electricity produced by a battery is direct current. Electromagnets and electric trains use direct current.

If in one second one coulomb of electrons passes a given point, then the current flow is 1 amp DC.

A cathode ray oscilloscope (CRO) is used to display the waveforms that show the pattern of how voltage and current vary over a period of time. The waveforms for DC are straight lines, as the voltage and current do not vary over a period of time. If a resistor is connected in a circuit and measurements of voltage across the resistor and current flowing through it are taken over a period of time, there will be no change in the voltage and current over this period. A plot of voltage or current against time produces a straight line.



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? Mentioned in ? References in periodicals archive
 
Galvanic isolators attach to the green grounding wire to limit galvanic current flow (up to about 1.
The current scoop on galvanic corrosion by Adriance, Bob / BOAT/U.S. Magazine
20) Other complications, such as chipped or fractured teeth (19,23,27) interproximal bone loss, (26) tooth abrasion and galvanic currents produced by the jewelry, and lingual gingival trauma, (18,19) have been observed in patients with tongue piercings.
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This study, for example, applied 5 mA of galvanic current for 20 minutes, resulting in a 100 mA*min treatment.
Evidence in practice by Ciccone, Charles D. / Physical Therapy
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