18
Special Two-terminal Devices
18.1 Introduction
The electrical conductivity of the semiconductor is influenced by external physical quantities such as temperature, illumination intensity, magnetic field, etc.
The thermistor is a compound semiconductor. Its resistance is dependent on the temperature. Similarly, magneto resistor is another semiconductor device. It is made of polycrystalline compound which has the property of changing resistance under influence of magnetic field.
The word thermistor stands for thermal dependent resistance and is a temperature sensitive device (resistor). In other words, its terminal resistance changes w.r.t. change in its body temperature. It is not a junction device. It is constructed from Ge, Si or mixture of ...
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