Variable resistor and thermistors?

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SUMMARY

The discussion centers on the role of a variable resistor in experiments involving thermistors. A variable resistor is essential for limiting current to prevent overheating of the thermistor, which could lead to inaccurate resistance measurements. Additionally, it allows for the measurement of current by assessing the voltage across the resistor while knowing its resistance value. This interplay between current and temperature is crucial for accurate thermistor readings.

PREREQUISITES
  • Understanding of thermistor operation and characteristics
  • Basic knowledge of Ohm's Law
  • Familiarity with circuit design principles
  • Experience with measuring voltage and current in electrical circuits
NEXT STEPS
  • Research the effects of temperature on thermistor resistance
  • Learn about Ohm's Law and its applications in circuit design
  • Explore different types of variable resistors and their uses in circuits
  • Investigate methods for measuring voltage and current in electronic experiments
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Electronics students, hobbyists conducting temperature experiments, and engineers designing circuits involving thermistors.

CAH
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If your doing an experiment to test how the temperature affects a thermistor (increase temp measure v and I...) why do you need a variable resistor in your circuit? Or if you don't NEED one what beneficial use may it pose anyway?
Is it something to do with the current?

Thanks
 
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It may be used to limit the current to a desired value. It can be also used to measure the current, by measuring the voltage across the resistor and knowing the value of its resistance.
If the current through the thermistor is too high, it will heat up and as its resistance decreases with temperature the current will keep increasing and so on.
 

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