Thermistor's temperature problem

  • #1
161
1

Homework Statement



A thermistor's temperature dependence is given by R=R0eb/t
where R is in ohms T is in Kelvins R0 and B are constants to be found.

a) If R =7360 at the ice point and 153 at steam point find R0 and B

Homework Equations





The Attempt at a Solution



I took logs so

LnR=R0B/T
rearranged so
(LnR)T/B=R0

then get simultaneous equations but the constant i am trying to find so for this example B are just going to cancel?

(Ln153)x373.15/B = (Ln7360)x273.15/B

Thanks in advance
 

Answers and Replies

  • #2
OmCheeto
Gold Member
2,137
2,594


Homework Statement



A thermistor's temperature dependence is given by R=R0eb/t
where R is in ohms T is in Kelvins R0 and B are constants to be found.

a) If R =7360 at the ice point and 153 at steam point find R0 and B

Homework Equations





The Attempt at a Solution



I took logs so

LnR=R0B/T
Shouldn't that be LnR=LnR0 + B/T ?
 

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