by Kimberly Wagner

Conductors, Semiconductors, and Insulators

Electricity is electricity from moving electrons. A Continuous flow of electrons is called a the current. Current can only flow with a closed loop, this closed loop is called a circuit. The difficulty an electric current faces to pass through an object is resistance.


Conductors are materials that freely allow the flow of electrons with very little resistance. An object made of a conducting material will permit charge to be transferred across the entire surface of the object. Conductors are used so you don't get a shock when you touch a wire.

Some examples of conductors are:

  • water
  • copper
  • Iron
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Semiconductors are materials that do not allow electors to flow freely but not directly stop them either, the purpose of a semiconductor is keeping electronic from overheating. A Semiconductor may has more resistance than a conductor, but still has less resistance than insulators.

These are example of Semiconductors:

  • aluminum
  • Silicon
  • Tin

The picture shows a material that surrounds a part that could easy over heat:

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Insulators are materials that greatly impede or stop the flow of electrons with very high resistance. Most non-metallic solids are said to be good insulators.

Insulators are supposed to stop the current to go somewhere were you don't want it to go.

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