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The role of the capacitor in the circuit

2015/4/15      view:
In the DC circuit, the capacitor is equivalent to open circuit of the.
This begins with talking about the structure of capacitor. The simplest is a capacitor plate and intermediate at both ends of the insulating dielectric [2] posed. Power, the electrically charged plates to form a voltage (electrical potential difference), but the middle of the material because it is insulated, so it is not conductive. However, this situation is that the capacitor does not exceed the critical voltage (breakdown voltage) under the conditions of the premise. We know that any material is relatively insulated, when the voltage across the material to increase to a certain extent, the substance can be conductive, and we call this voltage is called breakdown voltage. Capacitance is no exception, capacitor breakdown, the body of the insulator is not. However, in secondary school, so that the voltage in the circuit is not seen, so are the following work breakdown voltage, and can be read as an insulator.
However, in the AC circuit, because the current time into a certain direction is a function of change. The capacitor charging and discharging process is time, and this time, changes in the electric field formed between plates, and this electric field is also a function of change over time. In fact, the current through the field in the form passed by the capacitor.
In secondary schools, there is a saying, called Link exchange, blocking DC, that is the capacitance of this nature.
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