Consider a circuit with a capacitor, battery, wire, and bulb. Describe the source(s) charge during capacitor charging.
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During the charging process of a capacitor, the source(s) of charge come from the battery in the circuit. The battery acts as an energy source, providing a potential difference or voltage across the circuit.
To understand how the charging process works, we must examine the movement of charges within the circuit. When the circuit is first connected, a voltage is applied across the capacitor, creating an electric field. This electric field induces the movement of charges, causing electrons to flow from the negative terminal of the battery through the wire, towards the uncharged capacitor.
As the electrons flow into the capacitor, they accumulate on one plate, referred to as the "negative plate", due to their negative charge. This excess of negatively charged electrons on the negative plate creates an electric field that opposes the flow of additional electrons into the capacitor.
Consequently, the accumulation of excess electrons on the negative plate of the capacitor creates a deficit of electrons on the positive plate, thus leaving it with an overall positive charge. This positive charge on the positive plate attracts more electrons from the battery, causing them to accumulate on the positive plate until the capacitor is fully charged.
It's important to note that during the charging process, the battery continues to supply electrons to the circuit, compensating for the accumulation of charge on the capacitor plates. Once the capacitor reaches its full charge, the flow of electrons from the battery stops, and the charging process is complete.
In summary, the source of charge during the charging of a capacitor is the flow of electrons from the battery. These electrons accumulate on one plate of the capacitor, creating a positive charge on the other plate.