why the resistance of thermistor decreases when the temperature increases?
2006-12-16 17:40:36 · 1 個解答 · 發問者 匿名 2 in 科學 ➔ 其他：科學
Thermistors are made of semiconducting materials such as silicon or germanium. The charge carriers are both positive (holes) and negative (electrons). The number of charge carriers present in the semi-conductor depends much on temperature. At higher temperature, more charge carriers are produced and this increases the electrical conductivity of the material, i.e. a decrease of resistance.
2006-12-17 08:58:08 · answer #1 · answered by 天同 7 · 0⤊ 0⤋