What is the meaning of low-frequency high-frequency resistance of a capacitor?

The capacitor has a time problem of charge and discharge. When the AC power is in the positive half cycle, when the capacitor is charged, the current flowing through the circuit is equivalent to the path. Once the capacitor is charged, no current flows through the circuit, which is equivalent to an open circuit. When the negative half-cycle of the alternating current arrives, current will be generated again, which will first cancel out the opposite charge originally charged on the capacitor, and continue charging until it is full.

Now suppose that the capacitor needs a certain charging time t, then when a relatively high frequency AC end of a positive half cycle, assuming that the capacitor capacity is large enough to not fully charge, negative half weeks will come, this circuit will continue to flow current, quite This capacitor is accessible to this high-frequency alternating current.

If the frequency of this alternating current is low and the capacitor is full of charge in the first half week and the negative half cycle has not yet arrived, the current will be cut off halfway (//P: the charge will not move and there will be no current after the capacitor is full), then the capacitor for this In the case of low-frequency alternating current, it is not completely apathetic.

If the charging time is relatively large relative to the half cycle of AC power, then this capacitor can not be completely disconnected for AC power at this frequency, but has a certain impedance.

If the charging time is very short compared to the half cycle of the alternating current at that frequency, then the capacitor can be considered completely off and no current flows.