Direct current

Direct current, Unidirectional flow of electric charge.

Direct current image

Direct current (DC) is the one directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams. The electric current flows in a constant direction, distinguishing it from alternating current (AC). A term formerly used for this type of current was galvanic current.The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage.Direct current may be converted from an alternating current supply by use of a rectifier, which contains electronic elements (usually) or electromechanical elements (historically) that allow current to flow only in one direction.

High-voltage direct current
3 weeks ago

High-voltage direct current ... high-voltage, direct current (HVDC) electric power transmission system (also called a power superhighway or an electrical superhighway) uses direct current (DC)...

Transcranial direct-current stimulation
1 month ago

Transcranial direct-current stimulation ... Transcranial direct current stimulation (tDCS) is a form of neuromodulation that uses constant, low direct current delivered via electrodes on the head...

DC motor
2 weeks ago

DC motor ... DC motor is any of a class of rotary electrical motors that converts direct current electrical energy into mechanical energy. The most common types rely...

Electric current
3 weeks ago

Electric current ... the dynamo type. Alternating current can also be converted to direct current through use of a rectifier. Direct current may flow in a conductor such as...

Electric generator
3 weeks ago

Electric generator ... alternators. Dynamos generate pulsing direct current through the use of a commutator. Alternators generate alternating current. Mechanically a generator consists...

Direct-current plasma
7 minutes ago

Direct-current plasma ... Direct-current plasma (DCP) is a type of plasma source used for atomic emission spectroscopy that utilizes three electrodes to produce a plasma stream...

DC-to-DC converter
2 weeks ago

DC-to-DC converter ... electronic circuit or electromechanical device that converts a source of direct current (DC) from one voltage level to another. It is a type of electric power...

Alternating current
3 weeks ago

Alternating current ... Alternating current (AC) is an electric current which periodically reverses direction and changes its magnitude continuously with time in contrast to direct current...

War of the currents
1 week ago

War of the currents ... street lighting running on high-voltage alternating current (AC), and large-scale low-voltage direct current (DC) indoor incandescent lighting being marketed...

Cardioversion
18 minutes ago

Cardioversion ... Synchronized electrical cardioversion uses a therapeutic dose of electric current to the heart at a specific moment in the cardiac cycle, restoring the activity...

Neutral direct-current telegraph system
33 minutes ago
Voltage
1 week ago
Direct Currents
10 minutes ago
Glow discharge
2 weeks ago
The Current War
1 week ago
Pulsed DC
1 year ago
Residual-current device
3 weeks ago
Alternator
1 week ago
Direct
24 minutes ago
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