What is observed when a capacitor is charged with DC voltage?

Prepare for the ATandamp;T Technical Knowledge (TKT) II Exam. Use flashcards and multiple-choice questions, each with hints and explanations. Excel on your test!

When a capacitor is charged with DC voltage, it stores energy in the electric field created between its plates. This stored energy is what allows the capacitor to perform various functions in electrical circuits. Initially, when a DC voltage is applied, current flows into the capacitor as it begins to charge. However, once the capacitor is fully charged, it reaches a state where there is no longer any current flowing through it, effectively making it behave like an open circuit.

This characteristic of capacitors is essential in various applications, such as filtering in power supplies and timing circuits, where the capacitor alternates between charging and discharging based on the circuit's requirements. After charging, the capacitor's voltage equals the DC voltage applied, and as a result, there's no continuous current flow, distinguishing it from components that allow current to pass constantly.

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