Electronics - Voltage and Current - Discussion

If temperature increases then resistance value decreases means it is a negative temperature coefficient.

Thermistor is a PTC resistor. Its ohmic value directly proportional to the temperature. Yogeshwari is correct only. Ravikumar answer only wrong.

Assuming, as a first-order approximation, that the relationship between resistance and temperature is linear, then:

(Δ R)=k(Δ T),

where

ΔR = change in resistance
ΔT = change in temperature
k = first-order temperature coefficient of resistance

Thermistors can be classified into two types, depending on the sign of k. If k is positive, the resistance increases with increasing temperature, and the device is called a positive temperature coefficient (PTC) thermistor, or posistor. If k is negative, the resistance decreases with increasing temperature, and the device is called a negative temperature coefficient (NTC) thermistor.

A thermistor is a type of resistor whose resistance varies significantly with temperature

Please say correct answer thermistor is PTC or NTC ?

Thermistors are special solid temperature sensors that behave like temperature-sensitive electrical resistors. No surprise then that their name is a contraction of "thermal" and "resistor". There are basically two broad types, NTC-Negative Temperature Coefficient, used mostly in temperature sensing and PTC-Positive Temperature Coefficient, used mostly in electric current control.

Thermistors are two types- ptc and ntc. Depending upon their operation they are varied in temperature co-efficient. so no need to confuse frndz :)))))

Thermistors is a type of resister whose resistances varies significantly with temperature. Temperature increasing resistances decreasing.

It is to used measure the internal temperature of electical components.

What is a need to measure the internal temperature of electical components?