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Heat Capacity
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What is the purpose for finding temperature coefficient of resistance?
to investigate change in resistance as temperature is varied
What is the relationship between resistance and temperature?
• ntc 'negative temperature coefficient': its resistance decreases as the temperature increases• ptc 'positive temperature coefficient': its resistance increases as the temperature increases
How does voltage and current affect resistance?
No, resistance is not affected by either voltage or current. Reading the various answers to similar questions on this topic, there seems to be a misunderstanding of Ohm's Law in which people think that, because R = V/I, then a change in either voltage or current must cause a change in resistance. This is most definitely not the case. This is because resistance is the constant of proportionality in the equation. The equation, quoted, merely tells us what the resistance of the circuit happens to be for a given ratio of voltage and current.Resistance is only affected by the length, cross-sectional area, and resistivity of the conductor. Because resistivity is affected by temperature then, indirectly, temperature also affects resistance. So, if the current flowing through a conductor causes its temperature to change, then so, too, will its resistance -but, it is the temperature that is causing the change in resistance, not the current.
Is a Resistor a nonlinear device?
It is a linear device if it is not a wire wound resistor. These become non linear to AC at high frequencies because of their inherent inductance.
What are two things that can change the amount of current that flows?
voltage and resistance There is also temperature.
What are the electrical characteristics of a thermistor?
Varies its resistance with regard to temperature.
What is the effect of the temperature on the resistance?
It varies. On some items resistance goes up, some it goes down when temperature goes up.
What is a air temp sensor?
IAT air intake sensor is a thermistor ( a resistor that varies the value of it's resistance in accordance with temperature changes ) the change in the resistance values will directly effect the voltage signal from the sensor to the PCM/ECM. As the sensor temperature increases, the resistance values will decrease. As the sensor temperature decreases the resistance values will increase.
What is the purpose for finding temperature coefficient of resistance?
to investigate change in resistance as temperature is varied
Is there any change in resistance of carbon composition resistor due to change in temperature?
yes, calculate it from temperature coefficient of resistance.
How could you change the resistance of the thermistor?
Change its temperature.
What is the resistance to temperature change?
Heat Capacity
What is the relationship between resistance and temperature?
• ntc 'negative temperature coefficient': its resistance decreases as the temperature increases• ptc 'positive temperature coefficient': its resistance increases as the temperature increases
How does a graduated cylinder account for the volume change due to temperature change?
They have excellent chemical high resistance. They also have better resistance to temperature changes.
Resistance of a metallic conductor is linear over a considerable range of temperature what is meaning of it?
It means that the "Resistance of the Conductor varies directly with the temperature between a range or up to a limit". Varies Directly Means : If one increases the other too increases and vice versa.
How does the temperature affect the resistance of various resistors?
resistance depends on temperature too.. we know that R=R0( 1 + rho (change in temperature) ) where R= present resistance R0=resisance at 00C rho= resistivity of a material now if the change of temperature is positive , means if the temerature increases then the resistance will also increase and vice versa
Why does the resistance of a thermistor change when you change its temperature?
The resistance of a thermistor changes when its temperature changes due to the inherent properties of the thermistor material. In a negative temperature coefficient (NTC) thermistor, the resistance decreases as the temperature increases, whereas in a positive temperature coefficient (PTC) thermistor, the resistance increases as the temperature rises. This change in resistance is caused by the variation in the number of charge carriers (electrons or holes) and their mobility within the material as temperature changes.
