12 Calibrate a Thermistor in a Potential Divider Circuit as a Thermostat

Question 1

formula for a thermistors resistance as temperature varies

Answer 1

R=Roe^(b/t)

Question 2

what safety precautions should be taken when using a Bunsen burner

Answer 2

-hair and lose clothing tied back
-safety flame when not directly heating anything
-avoid touching non insulated regions

Question 3

why should you avoid heating the water too quickly

Answer 3

thermistor and thermometer will have thermal inertia. the temp of the thermistor and thermometer will not be the same as the water

Question 4

how can you cool the thermistor down to 0 degrees

Answer 4

start with the beaker full of ice and then heat the water using a Bunsen burner allowing a range of values from 0 to 100 degrees

Question 5

how to ensure the beaker is at a constant temp

Answer 5

use a stirrer

Question 6

how to calculate output pd in a potential divider circuit

Answer 6

Vout=Vin(R1/R1+R2)