Electrical Engineering › Section B · Resistance, Ohm's law, power, and energy › Topic B.2
Temperature effects and superconductors
A motor winding that measures 12 Ω on the bench can be well above 14 Ω once it is running hot, and some materials lose every trace of resistance when cooled far enough. This topic shows how to predict resistance at any working temperature and what happens at the cold extreme.
In this topic
- Why temperature matters
- The inferred absolute temperature
- Worked example: a hot motor winding
- The temperature coefficient α
- Worked example: a line on a winter night
- PPM ratings for resistors
- Temperature sensing and filaments
- Superconductivity
- High-temperature superconductors
- Common mistakes to avoid
- Key takeaways
This topic is part of Wuanberri Pro. Checking your access…