This note covers the conductivity of different materials, such as metals, ionic solutions, gases and vacuums. It is best used in conjunction with the mind map on resistance, and the corresponding note on conduction in different materials.
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Charge carriers in metallic conductors
Factors affecting resistance of metallic conductors
Charge carriers in ionic solutions
Factor determining conductivity of an ionic solution
Voltameter
Charge carriers in gases
Examples of gas discharge tubes
Charge carriers in a vacuum
Cathode ray tube
