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Why capacitor allows ac but not …

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Why capacitor allows ac but not DC to pass through it? Explain.

    • Posted by Akash Agarwal 7 years, 6 months ago

    CBSE > Class 12 > Physics
    • 3 answers

    Akash Agarwal 7 years, 6 months ago

    Thank you pulkit and PRAveen .

    0Thank You

    Praveen Kumar 7 years, 6 months ago

    Xc=1/wc=1/2pimiuc, There is no freuency in dc current hence f=0 Then the value of Xc is infinte . Therefore capacitive reactance offer infinte resistance to the circuit and no current flow through the circuit.

    1Thank You

    Pulkit Goyal 7 years, 6 months ago

    It may be possible as on passing dc ,the capacitor charges to steady state then it behaves as the open switch which not allow current to pass through it. But in ac the polarity changes continuously,so charging and discharging continuously takes place.

    1Thank You

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