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184_notes:cap_charging [2018/09/27 13:15] – dmcpadden | 184_notes:cap_charging [2021/06/14 23:43] – schram45 | ||
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Section 19.1 in Matter and Interactions (4th edition) | Section 19.1 in Matter and Interactions (4th edition) | ||
- | [[184_notes: | + | /*[[184_notes: |
- | [[184_notes: | + | [[184_notes: |
===== Charging and Discharging Capacitors ===== | ===== Charging and Discharging Capacitors ===== | ||
- | Over the last two weeks we have been building a fairly robust model of what happens to the charges both on the surface of the wires and those moving through the wire. Now we are going to introduce a circuit element called a capacitor and see what changes about the electron current, the electric field and the surface charges. [[184_notes: | + | Over the last two weeks we have been building a fairly robust model of what happens to the charges both on the surface of the wires and those moving through the wire (through resistors). Now we are going to introduce a new circuit element called a capacitor and see what changes about the electron current, the electric field and the surface charges. [[184_notes: |
{{youtube> | {{youtube> | ||
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[{{184_notes: | [{{184_notes: | ||
- | === Role of the Resistor === | + | ==== Role of the Resistor |
- | When charging or discharging a capacitor, there is usually a resistor placed in the circuit (like a lightbulb or some other kind of resistor) because the resistor helps control both the maximum current possible and the time it takes to charge/ | + | When charging or discharging a capacitor, there is usually a resistor placed in the circuit (like a lightbulb or some other kind of resistor) because the resistor helps control both the maximum current possible and the time it takes to charge/ |
- | === Video Demo === | + | ==== Video Demo ==== |
Here is a video demonstration of a lightbulb and capacitor circuit, charging and discharging. | Here is a video demonstration of a lightbulb and capacitor circuit, charging and discharging. | ||
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==== Examples ==== | ==== Examples ==== | ||
- | [[: | + | * [[: |
+ | * Example Video: Looking at a Capacitor as it's Charging | ||
+ | {{youtube> |