Obtain the resistance of a ntc thermistor

AI Thread Summary
To determine the resistance of an NTC thermistor at a specific temperature, the characteristic temperature (B) and the resistance at a known temperature (A) are crucial. The equation R = A * e^(B/T) can be used, where T is the temperature in Kelvin. The user is trying to find the resistance at 100 degrees Celsius, given that the resistance is 47 ohms at 20 degrees Celsius and the characteristic temperature is 3900K. There is confusion regarding the relationship between resistance and temperature, with assumptions made about linearity and the resistance approaching zero at the characteristic temperature. More information or clarification on the thermistor's behavior may be necessary for accurate calculations.
Sparky2020
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Please Help!

HI.
Im really struggling to work out how to obtain the resistance of a ntc thermistor from just having the temperature. I've been given the characteristic temp. of 3900K, labelled B for some reason. the only equation i can find to use is R = A.e to the power of B/T. I think this is somwthing to do with the base of natural logarithms, but when i asked my lecturer, he said no knowledge of logs was needed.
Please help!

Thank you loads in advance..
 
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Is there any more information?
 
The question asks that if the ntc thermistor has a resistance of 47 ohms at 20 degrees celsius, and its characteristic temp is 3900K then what is its resistance at 100 degrees celsius?
I can't even find a suitable equation which relates its resistance to its temperature.
 
I am going to guess here because I don't actually know. I'm guessing the resistance is 0 at the characteristic temperature. Perhaps you know about that. I will also assume a linear relationship. If it isn't linear, you need more information anyhow.

Assuming this, it's a ratio. Actually, I'll let you work it out rather. Try with these assumptions.
 

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