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184_notes:cap_in_cir [2021/03/12 17:50] – [Definition of Capacitance] bartonmo | 184_notes:cap_in_cir [2021/06/15 00:35] (current) – schram45 |
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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 $d$. | 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 $d$. |
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[{{ :184_notes:e-field_between_parallel_plates_new.png?350|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. }}] | [{{ :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. }}] |
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==== Deriving the Capacitance for Parallel Plates ==== | ==== Deriving the Capacitance for Parallel Plates ==== |
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==== Examples ==== | ==== 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}} |