SS: Direct and alternating current


A direct current (DC) is a flow of charges around a circuit in the same direction all the time.

  • Batteries supply DC and most appliances need DC to function.

 

Alternating current (AC) is a flow of charges around a circuit that reverses its direction at regular intervals, usually many times a second.

  • Household electrical power is supplied in the form of AC which usually needs to be rectified to DC before use.

 

 


Back To D.C. Circuits (O Level)

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