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What is difference between AC and DC current?

Updated: 8/16/2019
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8y ago

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DC, the electron flow is in one direction, from the negative terminal to the positive terminal, or, conventional current flows from the positive terminal to the negative terminal. But in any case the current flows in one direction only.

AC, the direction of the current flow reverses 120 times a second (for 60 Hz power) or at some other rate, with the voltage (or current) flow following a sine wave as it goes through zero, up to a positive peak, back through zero to a negative peak, then back to zero, for one cycle.

The advantage of AC is that you can use Transformers to efficiently change the voltage to various levels, high voltage for efficient power transmission, and safer lower voltage for house distribution, and even lower voltage to power electronics (after conversion to DC).

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8y ago
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12y ago

AC is power from an alternator ,, the voltage fluctuates between =120 volts and +120 volts .. DC is direct and is typically supplied by a battery

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Q: What is difference between AC and DC current?
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