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An applied voltage signal consists of a superposition of a dc voltage and an ac voltage of high frequency. The circuit consists of an inductor and a capacitor in series. Show that the dc signal will appear across C and the ac signal across L.

Class: Class 12 Subject: Physics Topic: Current Electricity

The dc signal will appear across capacitor C because for dc signals, the impedance of an inductor L is negligible while the impedance of a capacitor C  is very high (almost infinite).Therefore, a dc signal appears across C.

For an ac signal of high frequency, the impedance of L is high and that of C is very low. Thus, an ac signal of high frequency appears across L.

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