Electronics Fundamentals: Circuits, Devices & Applications
8th Edition
ISBN: 9780135072950
Author: Thomas L. Floyd, David Buchla
Publisher: Prentice Hall
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Textbook Question
Chapter 21, Problem 9TFQ
In a sample-and-hold circuit, an analog value is stored on a capacitor.
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(c)
A 2400 V, 1000 KVA, 0.85 power factor (PF) lagging, 50 Hz six-poles, Y-connected
synchronous generator has a synchronous reactance of 1.4 2 and an armature
resistance of 0.15 2. At 50 Hz, its friction and windage losses are 25 kW, and its core
losses are 15 kW. The field circuit has a DC voltage of 230 V, and the maximum IF is
10 A. The resistance of the field circuit is adjustable over the range from 20 to 200 £2.
The Open Circuit Characteristic (OCC) of this generator is shown in Figure Q1(c).
Calculate the internal generated voltage, EA of this machine at rated
conditions.
(i)
(ii)
(iii)
Determine the required field current to make Vr equal to 2400 V when the
generator is running at rated conditions.
If this machine is operating at rated conditions, determine the input torque,
TAPP that must be applied to the shaft of this generator.
4. a) Determine the output waveform for the following circuit.
b) Repeat with the B input held LOW
c) Repeat with B held HIGH
A
4.
1
0.
I Time
1
0.
The process of converting the analog sample into discrete form is called
Chapter 21 Solutions
Electronics Fundamentals: Circuits, Devices & Applications
Ch. 21 - A thermocouple can measure higher temperatures...Ch. 21 - Thermocouples are commonly used to measure body...Ch. 21 - An advantage of an RTD over a thermistor is that...Ch. 21 - Prob. 4TFQCh. 21 - A thermocouple signal conditioner must have high...Ch. 21 - Signal conditioning for temperature sensors...Ch. 21 - Prob. 7TFQCh. 21 - Absolute pressure is measured relative to the...Ch. 21 - In a sample-and-hold circuit, an analog value is...Ch. 21 - Prob. 10TFQ
Ch. 21 - A thermocouple a change in resistance for a change...Ch. 21 - In a thermocouple circuit, where each of the...Ch. 21 - A thermocouple signal conditioner is designed to...Ch. 21 - Prob. 4STCh. 21 - Prob. 5STCh. 21 - Prob. 6STCh. 21 - Prob. 7STCh. 21 - Prob. 8STCh. 21 - Prob. 9STCh. 21 - Prob. 10STCh. 21 - Prob. 11STCh. 21 - Prob. 12STCh. 21 - Prob. 13STCh. 21 - Prob. 14STCh. 21 - In an analog switch, the aperture time is the time...Ch. 21 - Prob. 16STCh. 21 - An analog signal must be sampled at a minimum rate...Ch. 21 - Prob. 18STCh. 21 - Prob. 19STCh. 21 - Prob. 20STCh. 21 - Prob. 21STCh. 21 - Three identical thermocouples are each exposed to...Ch. 21 - You have two thermocouples. One is a K type and...Ch. 21 - Determine the output voltage of the op-amp in...Ch. 21 - What should be the output voltage in Problem 3 if...Ch. 21 - Prob. 5PCh. 21 - Prob. 6PCh. 21 - Explain the difference in the results of Problems...Ch. 21 - Prob. 8PCh. 21 - A certain material being measured undergoes a...Ch. 21 - Explain how a strain gauge can be used to measure...Ch. 21 - Identify and compare the three symbols in Figure...Ch. 21 - Determine the output voltage waveform for the...Ch. 21 - Repeat Problem 12 for the waveforms in Figure...Ch. 21 - Name two ways an SCR can be placed in the...Ch. 21 - Sketch the VR waveform for the circuit in Figure...Ch. 21 - For the circuit in Figure 21-53, describe the...Ch. 21 - What change to the circuit in Figure 21-53 would...
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