we r saying that low pass rc filter will allow low frequency components n atte

we r saying that low pass rc filter will allow low frequency
components n attenuates the high frequency components..but
at low frequency reactance offer by capacitor is high..it
will act as open circuit..hence there will no output..but
practically we getting output. how?

Question Posted / pinky03_sagi

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we r saying that low pass rc filter will allow low frequency components n attenuates the high freq..

Answer / varunkumar_89

See,the open circuit does mean voltage = 0. It means current =0. The reverse is true for short circuit situation. At low frequencies the capacetive reactance becomes high, the there is lesser current flowing through capacitor. Hence there is more voltage drop across it. Thus the all input appears across capacitor. When frequency is zero (DC signal), there is almost zero current through capacitor. Hence maximum voltage is present across it. So we get the output.

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we r saying that low pass rc filter will allow low frequency components n attenuates the high freq..

Answer / ravi shanker

At low frequency the reactance offer by capacitor is high. For dc current which frequency is zero reactance offer by capacitor is infinite. so ur statement is wrong about the reactance offer by capacitor at low frequency.

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