Physics - Chapter 19

• The Coulomb force is conservative
• delta V = deltaPE/q
• 1 eV = 1.6E-19 J
• V = Ed (uniform field)
• The electric field must be perpendicular to the surface of any conductor
• Grounding - A process in which a conductor is fixed at 0 volts by connecting it to the Earth with a good conductor.
• Capacitor - device used to store electric charge
• The amount of charge Q a capacitor can store depends on 2 major factors

  • voltage applied
  • capacitor's physical characteristic, such as size
• Capacitance - Q=VC (Units: Farads)
• Capacitance - insulating material put between the plates of a capacitor to make d as small as possible to increase the capacitance
• Series rules

  • q: same
  • v: adds
  • c: adds reciprocally
• parallel rules for capacitors

  • q: adds
  • v: same
  • c: adds