| What is a negative temperature coefficient (NTC)? | If an electrical resistor has a lower resistance at higher temperatures, it has a negative temperature coefficient (NTC). |
| Which components usually have a negative temperature coefficient? | Usually, thermistors have a negative temperature coefficient. |
| What is a positive temperature coefficient (PTC)? | If an electrical resistor has a higher resistance at higher temperatures, it has a positive temperature coefficient (PTC). |
| Which components usually have a positive temperature coefficient? | Usually, metallic conductors have a positive temperature coefficient. |