Q:

What is the difference between an AC and DC current?

A:

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.

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Full Answer

Electricity arrives at consumer locations via AC, which, due to the shape of the current, can travel longer distances than DC. It powers lamps and appliances. Flashlights and other battery-powered devices use DC power. A laptop computer uses both: AC power is delivered from the wall outlet and transformed (in the black box that is part of the power cable) on its way to the machine, where it delivers DC to the computer battery.

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Related Questions

  • Q:

    What is the formula to convert AC to DC?

    A:

    The formula for converting AC voltage to DC is: AC = DC/0.636. The same formula may be used to convert DC voltage into AC voltage.

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  • Q:

    What is DC and AC resistance?

    A:

    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 ohm. Several common materials with high resistance levels include wood, tungsten, air, glass and rubber.

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  • Q:

    How was the name for the band AC/DC chosen?

    A:

    The Australian rock band AC/DC chose their name based on the acronym's representation of the two forms of electrical power, alternating current (AC) and direct current (DC), which symbolized the band's high-powered approach to their performances. Accordingly, the band's logo, designed in 1977, consists of the two electrical terms separated by a lightning bolt. The band's founding members, guitarists and brothers Angus and Malcolm Young, have said that the idea for the band name came to them after their sister, Margaret Young, spotted the acronym on a sewing machine.

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  • Q:

    How does a rectifier convert AC to DC voltage?

    A:

    A semi-conductor diode is the most common type of rectifier which  converts alternating current, or AC, to direct current, or DC, by allowing only a one-way flow of electrons. The sinusoidal AC input becomes DC voltage output using this process.

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