summary Of Capacitive AC Circuits

summary

● When an AC voltage is applied to a capacitor, it gives the appearance of current flow.

The capacitor charging and discharging represents current flow.

● The current leads the applied voltage by 90° in a capacitive circuit.

● Capacitive reactance is the opposition a capacitor offers to the applied voltage.

● XC represents capacitive reactance.

● Capacitive reactance is measured in ohms.

● Capacitive reactance can be calculated by the formula:

introduction to basic electricity and electronics technology-0261● RC networks are used for filtering, coupling, and phase shifting.

● A filter is a circuit that discriminates against cer- tain frequencies.

● A low-pass filter passes frequencies below a cutoff frequency. It consists of a resistor and capacitor in series.

● A high-pass filter passes frequencies above a cutoff frequency. It consists of a capacitor and resistor in series.

● Coupling networks pass AC signals but block DC signals.

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