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  • Insulators: Materials That Resist Electrical Current - Properties & Examples
    Materials that do not allow an electric current to pass through them easily are called insulators.

    Here are some examples:

    * Rubber: Used in electrical cords and insulation for wires.

    * Glass: Used in light bulbs and electrical insulators.

    * Plastic: Used in many electrical components and everyday objects.

    * Wood: Used in building structures and furniture.

    * Paper: Used in electrical insulation and packaging.

    * Air: A good insulator at normal atmospheric pressure.

    * Diamond: A very good insulator due to its strong covalent bonds.

    * Ceramic: Used in electrical components like capacitors and insulators.

    Why are they good insulators?

    Insulators have a tightly bound structure where electrons are not free to move easily. This means that when an electric field is applied, the electrons cannot carry a current.

    Note:

    While insulators generally resist electric current, they can break down under high voltage conditions. This is called dielectric breakdown and can lead to a short circuit or even a fire.

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