184_notes:cap_charging

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184_notes:cap_charging [2018/09/27 13:15] dmcpadden184_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:cap_in_cir|Next Page: Capacitors in a Circuit]]+/*[[184_notes:cap_in_cir|Next Page: Capacitors in a Circuit]]
  
-[[184_notes:resistivity|Previous Page: Resistors and Conductivity]]+[[184_notes:resistivity|Previous Page: Resistors and Conductivity]]*/
  
 ===== 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:motiv_movingq|A week ago]], we started talking about a two oppositely charged plates - so we'll start by returning to that example. +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:motiv_movingq|A week ago]], we started talking about a two oppositely charged plates - so we'll start by returning to that example. 
  
 {{youtube>GbOcSuFDEqs?large}} {{youtube>GbOcSuFDEqs?large}}
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 [{{184_notes:chargingcap3.jpg?200|Charge distribution and electric field when the capacitor plates are fully charged.  }}] [{{184_notes:chargingcap3.jpg?200|Charge distribution and electric field when the capacitor plates are fully charged.  }}]
  
-=== 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/discharge. The resistor does NOT impact how much charge the capacitor holds, just how fast the capacitor charges/discharges.+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/discharge. The resistor **does NOT impact how much charge the capacitor holds, just how fast the capacitor charges/discharges.**
  
-=== 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 ====
-[[:184_notes:examples:Week7_charging_capacitor|Looking at a Capacitor as it's Charging]]+  * [[:184_notes:examples:Week7_charging_capacitor|Looking at a Capacitor as it's Charging]] 
 +    * Example Video: Looking at a Capacitor as it's Charging 
 +{{youtube>Q34OmIW5rVU?large}}
  • 184_notes/cap_charging.txt
  • Last modified: 2022/10/19 14:40
  • by valen176