conductors
which material freely pass through called conductor. in these current resistance very low. all materials are not good conductors. which material having lot of free electrons it is good conductor, silver is lot of free electrons so it become good conductor. but price is very high that is why next good conductor is copper and aluminum so we are using copper in the electrical and electronic circuits.
exam: gold, silver, copper, aluminum etc.
Insulators
which material not allowing to pass current is called insulator. in these materials no
free electrons. these are used to provide electrical isolation.
exam : paper, ceramic, mica, rubber etc
semi-conductors
semi-conductors are used to make diodes, transistors and intergrated circuits.
germanium , silicon
dielectric
dielectric materials are basically insulting materials dielectric materials used to store electrical energy.
exam : paper, mica, ceramic
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