Question

A Capacitor blocks d.c. and allows a.c. Why ?

Answer 1

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If a constant voltage (DC) is applied across a capacitor that is not charged, it charges up to some value decided by the voltage and the capacitance (Q=CV). ... That's why capacitors are said to block DC. If the voltage is always changing over time (AC) the capacitor attempts to keep it constant.

Answer 2

Answer:

If a constant voltage (DC) is applied across a capacitor that is not charged, it charges up to some value decided by the voltage and the capacitance (Q=CV). ... That's why capacitors are said to block DC. If the voltage is always changing over time (AC) the capacitor attempts to keep it constant.

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