Conductors and insulators! Flashcards
What are conductors?
Conductors are materials that conduct electricity.
What do conductors allow?
Conductors allow current to flow, and electrical current can flow through a conductor.
Explain, in terms of particles, how a conductor works?
In a conductor, electrons are free to move, and conductors allow electrons to flow.
What are metals?
All metals are conductors.
What are wires made, with a special mention to wires in home and schools?
Wires that carry electrical current are made from metal, and most wires in schools and homes are made from copper, with a plastic coating
What are wires that cover long distance usually made from?
Wires that cover long distances are usually made from aluminium or steel, since these metals are cheaper than copper.
What are electrical insulators?
Electrical insulators are materials that do not allow current to flow through them.
What are some insulators?
Most non-metals, such as plastic, wood, air, glass, and cotton are insulators.
Explain, in terms of particles, how an insulator works?
In an insulator, the electrons are not free to move. Insulators inhibit electron flow.
Why can current not flow in insulators?
In insulators, because the electrons are not free to move, current cannot flow.
Why are insulators useful?
Insulators are used to keep people safe from electricity. Coating on plugs and wires to prevent ppl from getting electric shocks. They can help people identify and distinguish different types of wires with different colours
