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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
PROBLEMS 23–25 Refer to Fig. 7-32.
7.23 In Fig. 7-32, to what value must R3 be adjusted to provide zero volts across terminals C and D when the ambient temperature, TA, is 258C? (Note: R0 is the resistance of the thermistor at an ambient temperature, TA, of 25°C.)

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Q24
7.24 In Fig. 7-32, assume that RS is adjusted to provide zero volts across terminals C and D at an ambient temperature, TA, of 258C. What happens to the polarity of the output voltage, VCD, when
a. the ambient temperature, TA, increases above 25°C? b. the ambient temperature, TA, decreases below 25°C? 7.25 In Fig. 7-32, assume that R3 has been adjusted to 850 V to provide zero volts across the output terminals C and D. Determine
a. the resistance of the thermistor.
b. whether the ambient temperature, TA, has increased
or decreased from 258C.
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