Dielectric

• Can You Change the Capacitance of a Capacitor?
  You can change a capacitor’s capacitance by changing its plate geometry or dielectric; charge and voltage then respond according to its circuit.
• What Are Bound Charges in a Dielectric Material?
  Bound charges arise from dielectric polarization: their volume density is minus the divergence of polarization, and their surface density is its outward normal component.