Summary

Measured in capacitance (C=\frac{Q}{\Delta V}), value fixed by physical build C=\kappa \epsilon_0\frac{A}{d}
Field between plates is uniform except near edges. E_C=\frac{Q}{\kappa \epsilon_0 A} (equal to \frac{\Delta V}{d})
Charged particle between plates feels constant force. Projectile with constant accel.
Stored energy written as: U_C=\frac{1}{2}Q\Delta V=\frac{1}{2}C(\Delta V)^2=\frac{Q^2}{2C}.
Adding dielectric raises capacitance by factor of \kappa, sets up induced field inside dielectric that opposes plate field.
On AP exam, only parallel plate capacitors required, edge effects ignored unless stated otherwise.