Review

You should be able to: Identify (1-3) Define or Describe (4-7) Explain or discuss (5-8) Alternating current Direct current How a battery works

 alternating current  direct current  kinetic energy  electrical energy  cathode  generator  anode  Electrolyte  magnet (review) (circuits)

 electrons jump back and forth between atoms in the wires  Electrons change direction at over 100 times per second  electrical energy moves forward rapidly – like a wave through the wire

 electrons move from one atom to another in a single direction

 In a battery, electrons move from negative (−) to positive (+)  Anode - inner part of the battery where electrons are located  Cathode: center of a battery where positively charged ions are located.  electrolyte –  pasty mixture between anode & cathode  keeps electrons from moving thru.  Neutralization = empty battery  All of the electrons found a positively charged ion and made neutral atoms

 r-k (ac versus dc) r-k