Temperature has a significant impact on the resistance of materials, but its effect on insulators is a bit different from that on conductors.
For
insulators, as temperature increases, their resistance generally
decreases. This happens because, at higher temperatures, the atoms in the insulator vibrate more, creating more opportunities for electrons to jump or move. This process allows a small increase in the flow of charge through the material, reducing its overall resistance. However, even at higher temperatures, the resistance of insulators remains very high compared to conductors.
In simple terms:
- At lower temperatures: Insulators resist the flow of charge a lot (high resistance).
- At higher temperatures: Insulators' resistance decreases slightly, but still remains very high compared to conductors.
So, while temperature can affect an insulator’s resistance, it doesn't make it a good conductor. The material still resists the flow of electricity, just a bit less than at lower temperatures.