Explanation that temperature can cause Ohm's Law to break down. Includes a demonstration of Ohm's Law holding for one resistor and not for another.
Ohm's Law failing to hold for a light bulb with a resistance that varies with temperature.
Using a candle to increase the conductivity of air near an electroscope.
Using salt to increase the conductivity of water and light a bulb.
Calculation of resistance between body and Earth through a pair of shoes, including a demonstration that this resistance is not high enough to keep charge from flowing.
Connecting two batteries in series to demonstrate that the electromotive force doubles.
Finding the power supplied by a battery, with a demonstration of a 9V battery being shorted out.
Showing the large current and power supplied by a car battery when it is shorted out.
A power supply generated from falling water. Not explained until a later lecture.
Graphs of the voltage and current in an RC circuit with a square wave power supply.