Chapter : 1. Electricity
Classification of Material on Basis of Resistivity
Classification of Material on Basis of Resistivity
Substances showing very low resistivities The substances which show very low resistivities allow the flow of electric current through them. these type of substances are called conductors.
For example, copper, gold, silver, aluminium and electrolytic solutions are conductors.
Substances having moderate resistivity: The substances which have moderate resistivity offer appreciable resistance to the flow of electric current through them. Therefore, such substances are called resistors. For example, alloys such as nichrome, manganin, constantan and carbon are typical resistors
Substances having very high resistivity: The substances which have very high resistivities do not allow electricity to flow through them. The substances which do not allow electricity to pass through them are called insulators. For example, rubber, plastics, dry wood, etc. are insulators.
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