i need 6 differences b\w ac and dc ....voltage and current.?

Answer 1

1.) The polarity of AC fluctuates similar to a sinusoidal wave. DC does not fluctuate.
2.) AC requires a higher nominal voltage to carry the same amount of electrical energy as DC. When comparing AC with DC always divide the AC voltage by the square root of 2 to get the RMS (root mean square) value. For example an ordinary 60 watt household light bulb designed for 120 volts AC might burn out if 120 volts DC is applied.
3.) AC voltage may be stepped up or down using a transformer. A transformer would not have this effect on DC.
4.) With AC, tuned circuits can be formed using inductors and capacitors, to transmit and capture transmitted signals. Your car radio works this way.
5.) AC has the advantage over DC in that it can be transmitted over long distances using high tension wires.
6.) Ordinary storage batteries can only store and provide DC. Converter circuitry must be used to provide AC from a storage battery.

Answer 2

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