1. In silicon diodes up to about 5.6 volts, the Zener effect is the predominant effect and shows a marked negative temperature coefficient.

2. In 1887, Edward Weston discovered that metals can have a negative temperature coefficient of resistance, inventing what he called his "Alloy No. 2."

3. Soil frost penetration is contingent on the accumulated negative temperature and the depth of the snow cover, which in Latvia and Estonia can be up to a metre, and up to two metres in the north of Finland and Sweden.

4. The Bolometers are the positive or negative temperature coefficients based on the type of temperature resistive sensing element. The Bolometer diagram will be in the form of a bridge, where, one arm contains a resistor which is temperature dependant and it is for measurement of the power of microwave energy.