<aside> ☑️ Two charged metallic plates separated are an example of a capacitor, with the propery capacitance, which can be calculated by $C = \frac{Q}{V}$

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• $Q$ is the charge on one plate (not the total charge, which is zero)
  • You can take the $Q$ to be absolute value of the charge on either of the metallic plates
  • $\Delta V$ is the voltage difference bewteen the two plates
  • Units of Capacitance is Farad $[F = \frac{C}{V}]$
• $e^-$ move against the electric field, so we are left with a bunch of protons on the plate

Calculating $\vec E$ between the two plates

Cylindrical Capacitor

Spherical Capacitor

Capitance of an Isolated Sphere

Parallel and Series Connections

Energy Stored in Capacitor

Energy Stored in an Electric Field

Effects of Dielectrics

Polarization of Dielectric: An Atomic View