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  • Difference between AC and DC current

    jyothirmaijo

    Member

    Updated: Oct 26, 2024
    Views: 1.1K
    can i know what is the main difference between ac and dc????
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Replies

  • Vishal Sharma

    Member • Sep 13, 2012

    jyothirmaijo
    can i know what is the main difference between ac and dc????
    AC current that is "alternating current" as the name itself says "alternating" which means it has both +ve half cycle and -ve half cycle of current. hence we all it alternating current
    whereas, DC current only consist of +ve half cycle of current!
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  • sauravgoswami

    Member • Sep 13, 2012

    Vishal0203
    AC current that is "alternating current" as the name itself says "alternating" which means it has both +ve half cycle and -ve half cycle of current. hence we all it alternating current
    whereas, DC current only consist of +ve half cycle of current!
    To add more AC current are sine wave wereas DC current is a straight line,AC Current has 3-Phases while DC current do not have any phases
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  • satty lavanya

    Member • Sep 13, 2012

    ac current means alternating current which has the sinusodial current and dc current that is direct current which has the constant current supply....
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  • Vishal Sharma

    Member • Sep 13, 2012

    satty lavanya
    ac current means alternating current which has the sinusodial current and dc current that is direct current which has the constant current supply....
    i think #-Link-Snipped-# said the same thing above
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  • Kaustubh Katdare

    Administrator • Sep 13, 2012

    In order to understand the basic difference between AC and DC currents, one must go into the roots of how electricity is produced. Also, as noted earlier, it's important to visualise the AC current (in its graphical form) to have clear thoughts on how it differs from DC current.

    I'd like to leave you with another question to explore: Why is AC a preferred type for longer transmissions? ( this could very well be your viva question )
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  • Abhishek Rawal

    Member • Sep 13, 2012

    The transformers steps up increasing its voltage for longer distance transmission .... while the electric box you find near your lane/society/building consists of step down kit to decrease voltage for local area/residential area transmission.

    HVDC can be used for power supply to longer distance but it is not preferred for local area. why ? maybe because in DC supply once you get short its impossible to come out alive .... while in AC due to its property of di/dt it is more convenient.

    If any other reason .... elaborate please.
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  • Avinash S

    Member • Sep 13, 2012

    Could I post a fundamental question on this. How would we classify a current output from a sensor like a photodiode in varying light intensity.
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  • Jeffrey Arulraj

    Member • Sep 14, 2012

    AC current has an altering +ve and -ve peak voltage in it the current varies with time ie AC current is a function of time

    where as the DC current is not so it has a constant value at any instant of time . the two possible states available in DC current is ON state end OFF state
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  • jyothirmaijo

    Member • Sep 14, 2012

    thank you every one for ur valuble answers.................
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  • arunchary

    Member • Sep 14, 2012

    here is the document you can get better understand...
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  • satty lavanya

    Member • Sep 15, 2012

    Vishal0203
    i think #-Link-Snipped-# said the same thing above
    ya.i know.but..i thought.... while giving the answer is what in my view.i should post the answer....if another person said the same thong or not
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  • Jeffrey Arulraj

    Member • Sep 15, 2012

    Avinash S
    Could I post a fundamental question on this. How would we classify a current output from a sensor like a photodiode in varying light intensity.

    it is not AC it is merely a DC having some AC ripples and

    any ways the curve get is an exponentially decreasing one and not a sinusoidal one in the case of photo diode and stuff like that
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  • naveee

    Member • Sep 16, 2012

    jeffrey samuel
    AC current has an altering +ve and -ve peak voltage in it the current varies with time ie AC current is a function of time

    where as the DC current is not so it has a constant value at any instant of time . the two possible states available in DC current is ON state end OFF state
    multivibrator works on AC or DC ( corect my answer .... as u said DC has only ON OFF conditions........ MULTIVIBRATOR should be worked in DC ???? )
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  • Nishant Patel

    Member • Sep 16, 2012

    If we concern about wireless Tranmission.. over long-distance ;only a.c. can be used.. d.c. signal can't generate E.M. waves via antenna.(we can't get varying ele. as well as magn. field). so there shouldn't doubt on long dist. commn.
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  • Jeffrey Arulraj

    Member • Sep 16, 2012

    Nishant Patel
    If we concern about wireless Tranmission.. over long-distance ;only a.c. can be used.. d.c. signal can't generate E.M. waves via antenna.(we can't get varying ele. as well as magn. field). so there shouldn't doubt on long dist. commn.
    it is not AC signal used for transmission

    we use analog signal here instead of digital signal

    they are different AC DC ANALOG AND DIGITAL
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  • Jeffrey Arulraj

    Member • Sep 16, 2012

    naveee
    multivibrator works on AC or DC ( corect my answer .... as u said DC has only ON OFF conditions........ MULTIVIBRATOR should be worked in DC ???? )
    can you tell what is a multi vibrator that itself tells the answer to your post
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  • naveee

    Member • Sep 17, 2012

    jeffrey samuel
    can you tell what is a multi vibrator that itself tells the answer to your post
    a device that produce clock signals for digital circuits 😀
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  • Sairam_007

    Member • Sep 17, 2012

    AC current reverses its direction while flowing in a circuit..whereas DC current It flows in one direction in the circuit....
    AC current     is the current of magnitude varying with time..in DC the current has a constant magnitude!
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  • Jeffrey Arulraj

    Member • Sep 17, 2012

    here the ip is DC supply but the op is digital and not AC

    kindly don't confuse AC and digital signal guys
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  • sauravgoswami

    Member • Sep 18, 2012

    I feel everyone should hit wikepedia to understand electricity,we are wayward from the actual question and moving more towards electronics and digital signal.
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  • Jeffrey Arulraj

    Member • Sep 18, 2012

    there is an unnecessary confusion here about ANALOG DIGITAL AC AND DC signal

    some are confusing current with signal
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  • ganesh p

    Member • Sep 18, 2012

    AC-average value=0
    DC-average value=finite
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  • Nishant Patel

    Member • Sep 21, 2012

    ya..its exactly an analog signal..not an AC.
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