A thermistor has
A. Positive temperature coefficient
B. Negative temperature coefficient
C. Zero temperature coefficient
D. Variable temperature coefficient
Answer: Option A
Solution(By Examveda Team)
Positive temperature coefficient: This is the correct answer. A thermistor with a positive temperature coefficient (PTC) exhibits an increase in resistance with an increase in temperature. The resistance-temperature relationship is positive for PTC thermistors.Negative temperature coefficient: This is not the correct answer. A thermistor with a negative temperature coefficient (NTC) exhibits a decrease in resistance with an increase in temperature. The resistance-temperature relationship is negative for NTC thermistors.
Zero temperature coefficient: This is not the correct answer. A zero temperature coefficient would mean that the resistance does not change with temperature, which is not a characteristic of thermistors.
Variable temperature coefficient: This is not the correct answer. Thermistors typically have a well-defined temperature coefficient, either positive or negative, and are not variable in this aspect.
Therefore, in the context of the question, a thermistor has a Positive temperature coefficient.
This Question Belongs to Electrical Engineering >> Current Electricity
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Comments ( 5 )
Resistance of a material always decreases if
A. Temperature of material is decreased
B. Temperature of material is increased
C. Number of free electrons available becomes more
D. None of the above is correct
The minimum charge on an ion is
A. Equal to the atomic number of the atom
B. Equal to the charge of an electron
C. Equal to the charge of the number of electrons in an atom
D. Zero
Current velocity through a copper conductor is
A. the same as propagation velocity of electric energy
B. independent of current strength
C. of the order of a few micro m/s
D. nearly 3 x 108 m/s
It's correct answer is Negetive temprature coefficient......B
Thermistor are basically NTC so b is the right answer
Thermister...has both NTC And PTC
Thermistors are basically NTC.
B is the right Ans