Why AC current cannot be stored || Difference between AC and DC

 Why AC current cannot stored

Have you consider ever that why batteries always has "DC" current why it not has "AC" current, and why inverter needs run by "DC" current, when the "AC" current easily converted to "DC" current, and "DC" to "AC" is some difficult but despite this we store current in "DC" form.

Answer:-

We can't store "AC" current we can store only "DC" current, because "AC" current has frequency.

Before discuss about above questions in deeply we needs to understand different between AC and DC current.

Definition of "AC"

The “AC” Stands for Alternating Current

The "AC" has frequency means its polarity always changing, its polarity changes 50-60 times in one second, which we called frequency.

Basically when we run any appliance by "AC" it actually 50 times will "ON" and "OFF". if frequency is 50 Hertz then equipment will 50 time "ON" and "OFF" and if frequency is 60 Hertz then equipment will 60 times "ON" and "OFF" in one second.

The "AC" has two terminals which is Phase and Neutral, when current passing a wire it actually will pass like this.

AC waveform

This is one cycle and same like this 50 cycles passed in one second in "AC" current, it called waveform of current.

When the Phase passing through any wire, its polarity will change some like this, that when waveform will goes to up then voltage polarity will positive, and when waveform will goes down then voltage polarity will negative.

Its means in "AC" one Phase wire will always change polarity such as Positive or Negative in 50 times a second.

Definition of "DC"

The “DC” stands for Direct Current

The "DC" has not frequency means its polarity always same, such as which wire has Positive it always positive, and which wire has negative it always has negative, it will not change.

The "DC" has two terminals which is Negative and Positive, when the current passing a wire it will pass like this.

DC waveform

The "DC" current always flows in this way or direction, it called waveform of "DC" current.

Now we discuss about questions in deeply

The battery has two plates which store the electricity or current, so when the battery charging by "DC" current, then actually electrical charges accrue in plates, and have two types of charges "Positive" and "Negative".

So "DC" always has same polarity for this electrical charges can easily store in one plates, such as which plates collect Positive charges it always get positive, and vice versa for this "DC" can be stored.

 When the "AC" always change its polarity, for this when Positive charge accrue in plates, then quickly its input charge change to Negative, so which charge has accrued in plate, the it again release with negative, and again same plate get Negative charge, again its cycle changed, and also negative charge has released.

And this process will continue, for this "AC" current can't store in any plates such as any battery or cell.