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Question:

Capacitance can pass high frequency resistance low frequency principle

Capacitance can pass high frequency resistance low frequency principle

Answer:

When the negative half of the alternating current arrives, it will generate the current, first offset the original charge on the capacitor that the opposite charge, continue to charge to full.
The capacitor has a charge and discharge time problem. When the positive half of the AC, to the capacitor charging moment, the circuit is a current flow, the equivalent of the channel, once the capacitor is charged, the circuit will not flow through, the equivalent of open circuit.
In a cycle of alternating current, due to the positive and negative charge of the capacitor, the direction of the current flowing through the circuit is changed, but because of the repeated charge and discharge of the capacitor, the circuit will always have a current through, Can make the AC through, which is the capacitance of the communication characteristics.
This process of current flow will soon end, the specific length of time and the resistance of the circuit and the size of the capacitor, the larger the size of the product the greater the charging time, the shorter the contrary. After charging is complete, the voltage across the capacitor is equal to the size of the DC supply voltage
Capacitor has a direct effect on the direct current, refers to the DC current on the capacitor charge is completed, the circuit does not flow current. In the DC power supply just added to the capacitor, the circuit is a current flow, the current is the charge current of the capacitor.

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