1.

Explain the alternatingcurrent (AC).

Answer»

Solution :AC : The current whosedirectionchangesperiodically with timeis calledan alternating current (AC).

Here T (periodictime ) is thetime TAKEN bythe currentto complete one cycle. ITIS thesameas the timetaken by the rotatingcoilin the AC genertorto complete one rotation
`f = (1)/(T) ` gives frequency of AC . Itis the sameas the frequencyof rotationof the coil in the AC generator .
AC voltageof 220 Vand frequency 50HZ is usedfordomestic purposein India.
So , in India , the direction of AC changes100 times in1 second or AC change directionafter every `(1)/(100)`second .
A refrigerator ,mixer ,electric iron ,FAN etcworkon AC.


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