AC Electricity

AC Electricity

AC stands for alternating current.

• Many of you may be having bit knowledge of this as this is current that you get from your socket at home
• In America it is around 120 Volts And in India it is 220-230 Volts and 60 Hertz.
• In DC the waveform is straight line but in AC you can see a wave in the above image
• As its name indicates that this is alternating in nature its polarity reverses according to time and we can study it if we know the frequency ie: Hertz
• In India it is 60 Hertz mean it changes its polarity in 1/60 sec.As the formula is Time=1/frequency

The flow of electrons changes at every 1/60 sec and this concept of AC is very important to study the components like capacitors and to know that which component supports AC and which supports DC.

As many of you must have question in your mind that why we use AC and not DC for daily use in our appliances.

• It is because AC is easier to transmit long distance and its voltage can be easily increased or decreased using the transformers
• As you must have seen on electrical towers those black insulator longer the insulator greater is the resistance