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Q. |
Why does capacitor block dc signal at steady state? |
A. | due to high frequency of dc signal |
B. | due to zero frequency of dc signal |
C. | capacitor doesnot pass any current at steady state |
D. | due to zero frequency of dc signal |
Answer» D. due to zero frequency of dc signal | |
Explanation: frequency of dc signal is zero. so, capacitive reactance xc=1/2πfc becomes infinite and capacitor behaves as open circuit for dc signal. hence, capacitor block dc signal. |
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