Behaviour of Alternating Current or AC

 Alternating Current what is it

 

In most cases, we use AC current instead of DC current. AC current can be transferred from one place to another place very easily, without losing too much energy.

 

 

Alternating Current (AC)	Direct current (DC)
1)   Alternating current can easily be transmitted from one place to another at a very long distance without losing too much energy.	1) Transmission of Direct Current (DC) for long distance is not suitable. For long distance power loss is huge here.
2)   Using step-down transformers AC voltage can be easily varied from high voltage to low voltage
3) Using step-up transformers AC voltage can easily convert from low voltage to high voltage
3)   AC can be converted into DC

 

 

Behaviour of Alternating Current

or AC

 

Alternating current is a type of current, where it’s current value or it’s emf value changes continuously with time.

 

At a particular time interval the direction of current or direction of emf reversed. 

 

 

In circuit AC source is represented as

The current value at any moment t is :

And emf value at any moment t is

Where

I₀ = maximum value of current

E₀ = maximum value of emf

and finally we know that angular frequency is 

where

T  = time period

Therefore