When talking about electrical current, AC stands for "alternating current" and DC stands for "direct current." Alternating current is the type of current that comes from a power plant and outlet, in which the current cha... More »

Alternating current, or AC, power is a type of electrical current that alternates between a positive and negative charge and flow. AC power differs from the other main type of current, DC, which is a direct current that ... More »

www.reference.com Home & Garden Home Maintenance Electrical

An air conditioning system has several capacitors that provide the power boost required to start an electric motor or compressor. With a failed capacitor, the motor starts to run but fails, and the unit makes a loud humm... More »

www.reference.com Home & Garden Heating & Cooling

Ohio Electric Motors indicates that the main difference between AC and DC motors is the power source. AC motors are powered by an alternating current while DC motors use a direct current as a power source. More »

DC current is direct current, which means electricity only flows in one direction; AC current is alternating current, which means it flows in both directions. Batteries run on DC current, while AC current is what comes i... More »

Alternating current (AC) and direct current (DC) are types of voltage that are used for transmitting electricity. DC is constant energy that moves in one direction, whereas AC changes and moves in a wave-like pattern. More »

Resistance in AC and DC currents is the ability of a material, normally a circuit or a resistor, to oppose or restrict the flow of current through it. The amount of resistance that a material gives is referred to as an o... More »