Frog's leg batteries and voltaic pile.  Electric battery and electric current. Direct (DC) and alternating (AC) current. 

Conditions necessary for steady electric current.  Microscopic model: drift speed and current density. 

Conductivity and Ohm's Law.

Simple electric circuit.  Relationship between electric current and voltage.  

Resistance and resistors. Factors that affect resistance.  Resistivity.  Dependence on temperature. Superconductivity.

Electric meters: Ammeter and Voltmeter.  

Energy of electric current. Electric power. Efficiency. 

Electric bulbs: incandescent, florescent (CFL) and LED.  

How long does it take to boil water in electric kettle?  kW-h  - a new unit of energy.

Practice Assignments