1.

A capacitor blocks dc and allows ac. Why?

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.



Discussion

No Comment Found

Related InterviewSolutions