What is the diffrence in ac current and dc current?

The magnitude of AC(Alternating Current) keeps on changing with time, and has a frequency, while the DC (Direct Current) has constant magnitude

AC : move two direction , have rang frequancy (60/50)Hz and multi signals ( Sinusoidal, Trapezoidal and squarewave ) .

DC : move one direction , no frequancy and one signal (pulsing). 

Altenatnate current AC.it has transfer one direction current  

Direct Current DC,it has no one direction current other path supply position current

Ac Current flows in alternative direction with different range of frequency(50/60Hz Generally). Direct current flows in one direction. Hence DC current flows with 0 Hz

AC current is alternationg cueernt & DC direct cuuenrt 

move in two direction  & move one direction 

have frequency 50 Hz or 60 HZ & frequency 0 

magnitude varying with time  & No . constant 

Sinusoidal, Trapezoidal, Triangular, Square waves & pulsing 

AC CURRENT IS THE ALTERNATING CURRENT WHICH IS BASED UPON TIME PERIOD,FREQUENCY,AMPLITUDE. WHERE AS DC CURRENT IS THE DIRECT CURRENT WHICH IS ONLY HAVING AMPLITUDE.NO FREQUENCY,NO TIME PERIOD.

AC current is the alternating current in which the electric charges flow in reverse direction. This is the current that we use at home.

While, DC current is the direct current in which the electric charges flow in constant direction. This current is normally used for H-V power transmission.