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Semiconductors such as silicon, germanium and gallium arsenide (GaAs) have negative temperature coefficient.
Wiki User
∙ 10y ago
Wiki User
∙ 10y agoMetals have negative temp coefficient because as increase in temp the conducting nature retards
means increases in resistance
Wiki User
∙ 14y agothe materials are silver, aluminum, gold.
Wiki User
∙ 14y agoSilicon, Germanium, Carbon
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What is a ptc heating element?
Positive temperature coefficient heating element. Resistivity grow larger with higher temperatures so the heating element should be self regulating.
What are the two factors that affect the friction force between two surfaces?
The strength of the force of friction depends on the types of surfaces involved and on how hard the surfaces push together.
What is the temperature called at which the second virial coefficient of a real gas is zero?
Boyle temperature
Do Pure metals generally have high temperature coefficient?
As the metal forms mostly solid their formation of atom are close compare to liquid and gases so their atom vibrates at less rate they have relative less area to vibrate compare to liquid and gases so metal can withstand to a very high temperature
Does neutral temperature depend up on temperature of cold junction?
The neutral temperature is ABSOLUTELY INDEPENDENT OF THE TEMPERATURE OF ANY JUNCTION, but on NATURE of materials.
What materials have positive temperature coefficient?
the materials are silver, aluminum, gold.
How the resistance of conducting material vary with temperature?
Well, there's typically two types of materials-Those with positive temperature coefficient and those with negative temperature coefficient. Positive temperature coefficient are those whose resistance increases as temperature increases. Negative temperature cofficient are those whose resistance decrease when the temperature increase. There are however some alloys such as Manganin& Constantan whose resistance is not affected by temperature
Does a safe reactor have a positive or negative 'temperature coefficient of reactivity'?
negative 'temperature coefficient of reactivity'
Fullform of ntc and ptc?
ntc: negative temperature coefficient ptc: positive temperature coefficient
What is the temperature coefficient of an extrinsic semiconductor is?
positive
What is the difference between positive and negative temperature coefficient of resistance?
Negative temperature coefficient of resistance means that as the temperature of a piece of wire or a strip of semiconducting material increases, the electrical resistance of that material decreases.
What is the temperature coefficient of extrinsic semiconductor?
positive
Why temperature coefficient of copper is positive?
yes
Do The resistance of a material generally increases as its temperature increases?
The answer to this depends on the material from which the resistance is made. For most materials resistance increases with increasing temperature. This is referred to as having a "positive temperature coefficient". Some materials have a negative temperature coefficient; these do have uses in electronics.
What is a PTC Relay?
Positive Temperature Coefficient).......by vamsi
What happens when the temperature of a forward biased diode is increased?
What happens depends on the temperature coefficient of the diode. If that diode has a positive temperature coefficient, it resistance increases with increased temperature. A diode with a negative temperature coefficient does the opposite.
What Materials have a negative temperature coefficient?
Glass, Ceramics, Semiconductors
