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--- 184_notes:cap_in_cir [2021/03/11 22:33] – bartonmo
+++ 184_notes:cap_in_cir [2021/06/15 00:35] (current) – schram45
@@ Line 13: / Line 13: @@
 **Capacitance** is defined as the proportionality constant of the potential difference between the plates of the capacitor ( $| \Delta V|$ ) and the amount of charge that is on one plate ( $|Q|$ ) - if the charge increases, the potential difference should increase and vice versa. Note that since one plate will always have a charge of +Q and one will have a charge of -Q (because of conservation of charge), the  $|Q|$  will be the same no matter which plate you are looking at. In terms of an equation, this means that:
  $|Q|=C|\Delta V|$
-The units of capacitance are then **coulombs/volt (C/V), which is called a farad** (named after [[https://en.wikipedia.org/wiki/Michael_Faraday|Michael Faraday]]) and abbreviated with "F". A 1 F capacitor is an extremely large capacitor - large in physical size and also takes a long time to charge/discharge. A typical capacitor in electronic capacitors is on the order of nanofarads ( $10^{-9}$ ) to picofarads ( $10^{-12}$ ).
+The units of capacitance are then **coulombs/volt (C/V), which is called a farad** (named after [[https://en.wikipedia.org/wiki/Michael_Faraday|Michael Faraday]]) and abbreviated with "F". A 1 F capacitor is an extremely large capacitor - large in both in physical size and the amount of time it takes to charge/discharge. A typical capacitor in electronic capacitors is on the order of nanofarads ( $10^{-9}$ ) to picofarads ( $10^{-12}$ ).
 ==== Finding Capacitance ====
 We can actually find an expression for capacitance specifically for parallel plates using the [[184_notes:pc_vefu|relationship between electric field and electric potential]] and the definition of capacitance above. //__Assume we start with a pair of parallel plates__//, which have an area  $A$ , a charge of  $+/-Q$ , and are separated by a distance  $d$ .
-[{{  184_notes:5b_diagram_solution.jpg?300|Electric field between two parallel plates}}]
+[{{ :184_notes:e-field_between_parallel_plates_new.png?300|Electric field between two parallel plates. The dashed blue arrows represent the E-field from the negatively charged plate, and the solid red arrows represent the positive plate. }}]
 ==== Deriving the Capacitance for Parallel Plates ====
@@ Line 68: / Line 68: @@
 ==== Examples ====
-[[:184_notes:examples:Week7_energy_plate_capacitor|Energy Stored in a Parallel Plate Capacitor]]
+  * [[:184_notes:examples:Week7_energy_plate_capacitor|Energy Stored in a Parallel Plate Capacitor]]
+    * Video Example: Energy Stored in a Parallel Plate Capacitor
-[[:184_notes:examples:Week7_cylindrical_capacitor|Finding the Capacitance of a Cylindrical Capacitor]]
+  * [[:184_notes:examples:Week7_cylindrical_capacitor|Finding the Capacitance of a Cylindrical Capacitor]]
+    * Video Example: Finding the Capacitance of a Cylindrical Capacitor
+{{youtube>AAGXqz2JMbc?large}}
+{{youtube>vp_VWtwdMkE?large}}