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Chapter 8 Test Review Answer Key
Chapter 8 Test Review Answer Key

... 22. Large wheel that rotates when pushed by steam, wind, or water and provides mechanical energy to a generator 23. AC= alternating current, which is when the current switches directions in a regular pattern. DC=direct current, which is when current can only flow in one direction 24. Device that use ...
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Fabrication of Metallic Electrodes with Nanometer

< 1 ... 1099 1100 1101 1102 1103 1104 1105 1106 1107 ... 2014 >

Alternating current



Alternating current (AC), is an electric current in which the flow of electric charge periodically reverses direction, whereas in direct current (DC, also dc), the flow of electric charge is only in one direction. The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage.AC is the form in which electric power is delivered to businesses and residences. The usual waveform of alternating current in most electric power circuits is a sine wave. In certain applications, different waveforms are used, such as triangular or square waves. Audio and radio signals carried on electrical wires are also examples of alternating current. These types of alternating current carry information encoded (or modulated) onto the AC signal, such as sound (audio) or images (video).
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