9781422276006

D ifferent types of substances behave differently when elec- tricity is passed through them. Based on this property, substances can be classified into three categories. These are conductors, insulators, and semiconductors. Types of Materials

SCIENCE FACTS

● ● The use of asbestos as an insulator is now banned due to an occurrence of a large number of lung diseases caused by the inhalation of asbestos. ● ● Silver, copper, and gold are the three most conductive metals.

Conductors Conductors are those electronic materials that allow electricity to pass through them easily. These sub- stances have free electrons that can move around. All metals such as aluminum, silver, copper, and so on, are examples of conductors. They are used to make electrical appliances , wires, and metal sheets.

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SCIENCE & TECHNOLOGY