The thermistor is a commonly used device in many commercial, consumer, and industrial products. A thermistor with a negative temperature coefficient has a characteristic where its resistance is exponentially negative in proportion to temperature and takes on the form 5V (*) for some constants Ro, B and To- A thermistor, Rx, is placed in a voltage-divider interface circuit to monitor the temperature of a chamber as shown with the following parameters: B = 3500 K To 25 °C (25+273 K) Ro = 33 ΚΩ R₁ = 39 KQ R. = R₁ ³ (7-7) VOUT RX(T) = Roe In this configuration, as the temperature increases, the resistance of the thermistor + and so the output voltage would At a particular instant on a day, the output voltage was measured to be 2 V. Determine the resistance of the thermistor, and hence temperature of the chamber in kelvins. ΚΩ Rx T K ◆

Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter17: Resistive-inductive Series Circuits
Section: Chapter Questions
Problem 1PA: An AC electric motor is connected to a 240-V, 60-Hz source. A clamp-on ammeter with a peak hold...
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Thermistor 1
The thermistor is a commonly used device in many commercial, consumer, and industrial products. A thermistor with a negative temperature coefficient has a characteristic where
its resistance is exponentially negative in proportion to temperature and takes on the form
5 V
for some constants Ro, ß and To.
A thermistor, Rx, is placed in a voltage-divider interface circuit to monitor the temperature of a chamber as shown with the following parameters:
B = 3500 K
To 25 °C (25+273 K)
Ro = 33 ΚΩ
R, = 39 ΚΩ
=
R
Check
R₁
RX(T) = Roe
VOUT
(7-7)
◆ and so the output voltage would
In this configuration, as the temperature increases, the resistance of the thermistor
At a particular instant on a day, the output voltage was measured to be 2 V. Determine the resistance of the thermistor, and hence temperature of the chamber in kelvins.
ΚΩ
Rx
T
K
◆
Transcribed Image Text:Thermistor 1 The thermistor is a commonly used device in many commercial, consumer, and industrial products. A thermistor with a negative temperature coefficient has a characteristic where its resistance is exponentially negative in proportion to temperature and takes on the form 5 V for some constants Ro, ß and To. A thermistor, Rx, is placed in a voltage-divider interface circuit to monitor the temperature of a chamber as shown with the following parameters: B = 3500 K To 25 °C (25+273 K) Ro = 33 ΚΩ R, = 39 ΚΩ = R Check R₁ RX(T) = Roe VOUT (7-7) ◆ and so the output voltage would In this configuration, as the temperature increases, the resistance of the thermistor At a particular instant on a day, the output voltage was measured to be 2 V. Determine the resistance of the thermistor, and hence temperature of the chamber in kelvins. ΚΩ Rx T K ◆
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