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Direct current

Direct current (DC or "continuous current") is the continuous flow of electric charge through a conductor such as a wire from high to low potential. In direct current, the electric charges flow always in the same direction, which distinguishes it from alternating current (AC).

Building a DC Power Supply

This device is commonly used for doing electrophoresis. Commercially available units that provide the necessary 120VDC usually cost $1,200 or more. The following one costs less than $20.

Circuit Analysis Techniques

Ohm's Law states the voltage across a resistor, R (or impedance, Z) is directly proportional to the current passing through it (the resistance/impedance is the proportionality constant).

Direct Current (DC) Electricity

Direct current or DC electricity is the continuous movement of electrons from an area of negative (-) charges to an area of positive (+) charges through a conducting material such as a metal wire. Whereas static electricity sparks consist of the sudden movement of electrons from a negative to positive surface, DC electricity is the continuous movement of the electrons through a wire.

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