Answer / nandhini

AC- alternative current, current flows in both the direction
and it is used in home,industry power supplies.
DC-direct current, current flows in only one direction and
it is used in small batteries and toys.

Answer / alfrad nobel

alternate current(AC) having frequency(no of cycles per second),direct current(DC) have no frequency.

Answer / sathyaraj

AC- Alternative current
DC- Direct current

Answer / mani bhushan

1>AC current have period.
DC current have no period.
2>AC current have certain frequency.
DC current have 0 frequency.
3>Generation of AC current is easy.
Generation of DC current is not easy.

Answer / electrokarz

* AC can be stepped-up or stepped down efficiently using
transformers where as DC cannot be stepped up or down
efficiently ( the losses in DC-DC buck/boost choppers are
quite high)

* Skin effect is observed in AC transmission systems but not
in DC.

* The need of brushes and commutators makes DC generators
expensive and needs regular maintenance where as AC machines
(generators and motors) are cheap and needs less or no
maintenance.

* Synchronization with system frequency is needed in AC systems.

Answer / sree ranga prasad

AC(ALTERNATIVE CURRENT)
-IN AC MAGNITUDE IS VARYING
-AC HAVING FINUTE TIME PERIOD
-AC TERMINALS REPRSENTED BY PHASE AND NEWTRAL
-IN AC SINGLE PHASE AND THREE PHASE AVALIBLE
-IT HAS SOME FREQENCY

DC(DIRECT CURRENT)
-IN DC MAGNITUDE IS CONSTANT
-HERE TIME PERIOD IS INFINITY
-HERE FREQENCY IS ZERO
-TERMINALS ARE REPRSENTED BY +,-

Answer / ajit yadav

ac is alternate current in this the signal is continuous
with time in any frequency range
a complete cycle is a frequency means positive and negative
cycle

Answer / himanshu rana

AC can not be stored but DC can be stored in batteries.

Answer / ram kumar verma

ac has polarities while dc is unipolar

Answer / prabhakar reddy

AC IS IN CONTINIUES BUT DC ISIN DISCRETE FORM

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