9.4 conductors and insulators Flashcards
1
Q
name 5 electrical conductors and 5 electrical insulators
A
examples:
conductors - copper, aluminium, iron, silver, gold
insulators - wood, plastic, leather, book, pencil
2
Q
why are copper wires covered with plastic coating
A
to prevent electrical shock
3
Q
why are wires that cover long distances usually made of steel or aluminium instead of copper?
A
cheaper
4
Q
what are conductors?
A
materials that have free moving electrons
5
Q
what are insulators?
A
materials that do not have free moving electrons
6
Q
when current flows, particles called ____ move.
A
electrons
7
Q
in metals, these particles are / are not free to move
A
are free to move
