Glass, paper, Teflon and rubber are good insulators of electricity. An insulator is a substance that allows very little electric current to flow through it. There is no perfect insulator, but materials that offer a high degree of resistance to the flow of electrons are good insulators.Know More
All substances offer resistance to the flow of electric current through them. This is called the resistivity of the material. Different materials have varying resistivity levels. The higher the resistivity of the material, the less electric current passes through it.
Rubber has high resistivity of 1-100 x 1013ohm-meter, making it a good insulator. Copper has a low resistivity of 1.59 x 10-8 ohm-meter, which makes copper a good conductor of electricity, or a poor insulator.Learn more about Electricity
Glass is a good electrical insulator because the electrons in the glass are tightly bound to the atoms and do not transfer easily, thus keeping electricity from moving through the glass. Conversely, good electrical conductors contain electrons that move freely.Full Answer >
In general, metals like copper and aluminum are the best conductors of electricity. Good conductors are able to allow electrons to easily flow through.Full Answer >
The conducting abilities of water depends on the type of water or the purity of it. Pure water, that does not have any other elements in it is a better insulator of electricity than it is a conductor. The opposite holds true for things like salt water, because of the extra elements in it.Full Answer >
Gold is a very good conductor of electricity. It is often used as plating for connectors because it does not tarnish or corrode easily.Full Answer >