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captinkareem1
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The books answer is D. No clue why though
Thank you for you effort
Test Your Knowledge: Thermistor MCQ with D as the Correct Answer
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In summary, the conversation discusses a voltage divider with variable resistances. The task is to write an expression for the output voltage in terms of the input voltage and the two resistances, with a hint that the circuit is a series one and the current must flow through both resistances. The goal is to determine how R1 changes with temperature and how to manipulate it to achieve the desired relationship between V_out and temperature.
The books answer is D. No clue why though
Thank you for you effort
- #2
cepheid
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Welcome to PF captinkareem1!
It's a voltage divider, with resistances R1 and R2. The only difference from usual is that R1 is a temperature variable resistor, rather than a constant one. Can you write down an expression for the output voltage in terms of the input voltage, and the two resistances? Hint: it's a series circuit, so the same current has to flow everywhere, including through R1 and through R2. The expression you come up with should just be the standard voltage divider equation.
This will allow you to infer how R1 changes with T (does it increase or decrease) and therefore what you should do with it to get the desired dependence of V_out on T.
It's a voltage divider, with resistances R1 and R2. The only difference from usual is that R1 is a temperature variable resistor, rather than a constant one. Can you write down an expression for the output voltage in terms of the input voltage, and the two resistances? Hint: it's a series circuit, so the same current has to flow everywhere, including through R1 and through R2. The expression you come up with should just be the standard voltage divider equation.
This will allow you to infer how R1 changes with T (does it increase or decrease) and therefore what you should do with it to get the desired dependence of V_out on T.
1. What is a thermistor?
A thermistor is a type of temperature sensor that uses the principle of resistance to measure changes in temperature. It is usually made of ceramic or polymer materials and has a high sensitivity to temperature changes.
2. How does a thermistor work?
A thermistor works by measuring changes in its electrical resistance as the temperature changes. As the temperature increases, the resistance of the thermistor decreases, and vice versa. This change in resistance can be converted into an electrical signal and used to measure temperature.
3. What are the different types of thermistors?
The two main types of thermistors are negative temperature coefficient (NTC) and positive temperature coefficient (PTC) thermistors. NTC thermistors have a negative relationship between resistance and temperature, while PTC thermistors have a positive relationship.
4. What are some common applications of thermistors?
Thermistors have a wide range of applications, including temperature sensing in electronic devices, control and monitoring of industrial processes, and as a part of electronic temperature compensation circuits.
5. How accurate are thermistors in measuring temperature?
The accuracy of a thermistor's temperature measurement depends on various factors such as the quality of the sensor, the calibration process, and the operating conditions. However, thermistors can provide high accuracy and precision in temperature measurements, with some models having an accuracy of ±0.1°C.
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