Alternating Current (AC Current)

If the magnitude of current changes with respect to distance and time sinusoidally then the current is called alternating current.

The equation of AC is written as:

I = I_osin[latex]\omega t[/latex]  …………………. (1)

Where, I_o is the peak value of alternating current (amplitude of current).

Here, [latex]\omega = \frac{2\pi}{T}[/latex]

Direct Current (DC Current)

If the magnitude of current remains constant with respect to time and distance then the current is called direct current (DC Current).

Average value of alternating current / Mean value of alternating current (I_m or I_av):

The average value of alternating current or mean value of alternating current is the DC current to send same amount of charge in the circuit in certain interval of time which is sent by alternating current in the same circuit in same time which is denoted by (I_m or I_av).

We know that, the equation of alternating current is:

I = I_osin[latex]\omega t[/latex]  ………………. (i)