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. }}]
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[{{ :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 ====
==== Deriving the Capacitance for Parallel Plates ====
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==== Examples ====
==== Examples ====
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[[:184_notes:examples:Week7_energy_plate_capacitor|Energy Stored in a Parallel Plate Capacitor]]
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* [[:184_notes:examples:Week7_energy_plate_capacitor|Energy Stored in a Parallel Plate Capacitor]]
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* Video Example: Energy Stored in a Parallel Plate Capacitor
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[[:184_notes:examples:Week7_cylindrical_capacitor|Finding the Capacitance of a Cylindrical Capacitor]]
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* [[:184_notes:examples:Week7_cylindrical_capacitor|Finding the Capacitance of a Cylindrical Capacitor]]
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* Video Example: Finding the Capacitance of a Cylindrical Capacitor