ELECTRICITY FOR TRADES
3rd Edition
ISBN: 9780078118630
Author: Petruzella
Publisher: RENT MCG
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Textbook Question
Chapter 6.1, Problem 17RQ
How must ammeters be connected relative to the circuit current that needs to be measured?
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1) What is the value of the current through the battery when the switches SW1, SW2, and SW3 are OPEN?
In the circuit of the figure, ε = 12.2 V, R = 7.34 Ω and L = 5.48 H. The battery is connected at t = 0. Determine:
a) The amount of energy delivered by the battery during the first 2.00 s.
b) The amount of energy stored in the magnetic field of the inductor.
c) The amount of energy dissipated in the resistor.
4) For the sinusoidal signal m(t) = 2 sin(1000πt + 0.0557), shown down, is sampled,
quantized and then encoded using the PCM technique. If a uniform quantizer, with
8 levels and a dynamic range [-2, 2], is used
(a) Calculate the first 4 quantized samples and the
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(b) Calculate the maximum quantization error (c) Calculate the signal-to-quantization-
noise ratio.
(d) Calculate the resultant bit rate.
italicio
(e) If it is required to increase the signal-to-quantization-noise ratio by 6 dB, how
many quantization levels should be used in this case? What is the ratio between the
new bit rate and the previous bit rate?
msec
Chapter 6 Solutions
ELECTRICITY FOR TRADES
Ch. 6.1 - Explain how measurements are made using an analog...Ch. 6.1 - Prob. 2RQCh. 6.1 - Name the three basic metering functions that can...Ch. 6.1 - What is the purpose of the multimeter function...Ch. 6.1 - What is the purpose of the multimeter range...Ch. 6.1 - An analog voltmeter uses a single scale calibrated...Ch. 6.1 - Unlike analog multimeters, digital multimeters...Ch. 6.1 - Prob. 8RQCh. 6.1 - How are voltmeters connected relative to the...Ch. 6.1 - Digital voltmeters have little or no loading...
Ch. 6.1 - A digital multimeter is used to measure a DC...Ch. 6.1 - Define voltage drop.Ch. 6.1 - How are ground-referenced voltage measurements...Ch. 6.1 - State one advantage and one limitation of a...Ch. 6.1 - A noncontact voltage detector is to be used to...Ch. 6.1 - When measuring voltages and currents of unknown...Ch. 6.1 - How must ammeters be connected relative to the...Ch. 6.1 - Ammeters are required to have very low resistance...Ch. 6.1 - What is the advantage of taking a current reading...Ch. 6.1 - Explain how a clamp-on ammeter measures current...Ch. 6.1 - While attempting a voltage measurement across a...Ch. 6.1 - A clamp-on ammeter is to be used to determine the...Ch. 6.2 - What four basic components make up the internal...Ch. 6.2 - How is the pointer of an analog-type ohmmeter set...Ch. 6.2 - Series analog ohmmeters have nonlinear scales....Ch. 6.2 - What does a resistance reading of OL on a digital...Ch. 6.2 - A multimeter set to measure resistance is...Ch. 6.2 - When doing in-circuit component resistance...Ch. 6.2 - Explain the purpose of the multimeter continuity...Ch. 6.2 - An ohmmeter is connected across the two leads of a...Ch. 6.2 - Convert each of the following digital multimeter...Ch. 6.2 - Give an example of what might cause the occurrence...Ch. 6.2 - What energy-level category of multimeter is...Ch. 6.2 - A simple resistance measurement is made to test...Ch. 6.2 - What type of hand protection may be required when...Ch. 6.2 - Compare the input impedance of analog and digital...Ch. 6.2 - Define meter accuracy.Ch. 6.2 - Define meter resolution.Ch. 6.2 - What protection is afforded by the fuse connected...Ch. 6.2 - Prob. 18RQCh. 6.2 - The diode test function of a DMM is to be used to...Ch. 6.2 - Under what condition will true RMS and averaging...
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