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Ohm's Law, Conductivity & Resistance

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Ohm's Law and Temperature
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.
Demonstration: Breakdown of Ohm's Law
Ohm's Law failing to hold for a light bulb with a resistance that varies with temperature.
Demonstration: Increasing the Conductivity of Air
Using a candle to increase the conductivity of air near an electroscope.
Demonstration: Increasing the Conductivity of Water
Using salt to increase the conductivity of water and light a bulb.
Resistance in Your Shoes
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.

Course: 8.02 Electricity and Magnetism, Spring 2002

Instructor: Prof. Walter Lewin

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Ohm's Law, Conductivity & Resistance

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