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A DC current does not go through the capacitor after the initial charging. Check the equation...

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Physics

A DC current does not go through the capacitor after the initialcharging. Check the equation that describes the impedance in RCcircuits when the frequency f decreases to zero (which is the caseof any DC current). Explain qualitatively why an AC current can gothrough a capacitor , but a DC current cannot.

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4.1 Ratings (566 Votes)
1 Mahtematically The Impedance Reactance with no Resistance of the capacitor Xc 1 2PifCFor DC frequency f 0 Then Xc infinity and DC Current is blocked and does not flowFor AC f is not Zero and hence AC Current can flow 2 DCTransients Point of viewThe Property of Capacitance is that the Capacitance acts initially as a Short Circuit and    See Answer
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