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Capacitors are one of a large number of electronic components used in electronic devices and are widely used in circuits.
In DC circuits, capacitors are equivalent to open circuits. A capacitor is a component that can store charge, and is one of the most commonly used electronic components.
In AC circuits, the direction of the current changes as a function of time. The process of charging and discharging the capacitor is time-consuming. At this time, a changing electric field is formed between the plates, and the electric field is also a function of time. In fact, current flows through the capacitor in the electric field.