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 6, Problem 13ST
In a certain two-source circuit, one source acting alone produces 10 mA through a given branch. The other source acting alone produces 8 mA in the opposite direction through the same branch. With both sources, the total current through the branch is
- 10 mA
- 8 mA
- 18 mA
- 2 mA
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Students have asked these similar questions
The input reactance of an infinitesimal linear dipole of length A/60 and radius a=A/200
is given by
Xin = – 120
[In(€/a) — 1]
tan(ke)
Assuming the wire of the dipole is copper with a conductivity of 5.7 x 10' S/m,
determine at f = 1 GHz the
(a) loss resistance
(b) radiation resistance
(c) radiation efficiency
(d) VSWR when the antenna is connected to a 50-ohm line
Example
Solve the octic polynomial
2x⁸-9x⁷+20x⁶-33x⁵+46x⁴-66x³+80x²-72x+32=0
Solution
Divide by x⁴
2x⁴-9x³+20x²-33x+46-66/x + 80/x² - 72/x³ + 32/x⁴=0
Combine and bring terms
2(x⁴+16/x⁴) - 9(x³+8/x³) +20(x²+4/x²)-33(x+2/x) + 46= 0
Let use substitution
Let x+2/x =u
(x+2/x)²= u²
x²+2x*2/x + 4/x² = u²
x²+4/x²= u²-4
(x+2/x)³= x³+8/x³+3x*2/x(x+2/x)
u³= x³+8/x²+6u
x³+8/x³= u³-6u
(x²+4/x²)²= x⁴+2x²*4/x² + 16/x⁴
(u²-4)²= x⁴+16/x⁴ + 8
x⁴+16/x⁴ = (u²-4)²-8
x⁴+16/x⁴ = u⁴-8u²+8
2(u⁴-8u²+8)-9(u³-6u)+20(u²-4)-33u+46=0
Expand and simplify
2u⁴-9u³+4u²+21u-18=0
After checking
(u-1)(u-2) Are factors
Then
2u²-3u-9=0
u=3, u=-3/2
Assignment question
Solve the octic polynomial
2s⁸+s⁷+2s⁶-31s⁴-16s³-32s²-160=0 using the above example question, please explain in detail
b)
Another waveform g(t) is defined by
=0
t≥0, α>0
otherwise
g(t)= At exp(-at)
and is plotted in Figure 1 (for representative values of 4 = 1 and α = 1).
g(t)
0.4T
0.3+
0.2
0.1+
2
0
2
Figure 1
8
c)
Show that its amplitude spectrum is |G(@)| = -
A
(a²+0²)²
Describe briefly, with the aid of labelled sketches, how changing a affects
the waveform in both the time and frequency domains.
d) Deduce the Fourier transform H(@) of h(t) = g(t)+g(t+b)+g(t-b) and
calculate its DC amplitude H(0).
Chapter 6 Solutions
Electronics Fundamentals: Circuits, Devices & Applications
Ch. 6 - Parallel resistors are always connected between...Ch. 6 - If one resistor is connected in series with a...Ch. 6 - In a series-parallel combinational circuit, the...Ch. 6 - A larger load resistor has a smaller loading...Ch. 6 - When measuring de voltage, a DMM will normally...Ch. 6 - When measuring de voltage, the input resistance of...Ch. 6 - When measuring & voltage, the input resistance of...Ch. 6 - A Thevenin circuit consists of a voltage source...Ch. 6 - The internal resistance of an ideal voltage source...Ch. 6 - To transfer maximum power to a load, the load...
Ch. 6 - Which of the following statements are true...Ch. 6 - The total resistance of Figure 6-73 can be found...Ch. 6 - If all of the resistors in Figure 6-73 have the...Ch. 6 - Prob. 4STCh. 6 - The parallel combination of a 330 resistor and a...Ch. 6 - In the circuit described in Question 5, the...Ch. 6 - Prob. 7STCh. 6 - The output of a certain voltage divider is 9V with...Ch. 6 - Prob. 9STCh. 6 - When a load resistance is connected to the output...Ch. 6 - The output voltage of a balanced Wheatstone bridge...Ch. 6 - Prob. 12STCh. 6 - In a certain two-source circuit, one source acting...Ch. 6 - Prob. 14STCh. 6 - Prob. 15STCh. 6 - You are measuring the voltage at a given point in...Ch. 6 - Prob. 1TSCCh. 6 - Determine the cause for each set of symtims. Refer...Ch. 6 - Prob. 3TSCCh. 6 - Determine the cause for each set of symptoms....Ch. 6 - Prob. 5TSCCh. 6 - Identify the series and parallel relationships in...Ch. 6 - Visualize and draw the following series-parallel...Ch. 6 - Visualize and draw the following series-parallel...Ch. 6 - In each circuit of Figure 6-76 identify the series...Ch. 6 - A certain circuit is composed of two parallel...Ch. 6 - For the circuit in Figure 6-77, determine the...Ch. 6 - Determine the total resistance for each circuit in...Ch. 6 - Determine the current through each resistor in...Ch. 6 - Determine the current through each resistor in...Ch. 6 - In Figure 6-78, find the following: total...Ch. 6 - In Figure 6-78, determine the current through R2...Ch. 6 - In Figure 6-78, determine the current through R4...Ch. 6 - A vlotage divider consists of two 56k resistors...Ch. 6 - A 12 V battery output is divided down to obtain...Ch. 6 - Which will cause a smaller decrease in output...Ch. 6 - In Figure 6-79, determine the current drain on the...Ch. 6 - Across which one of the following resistances will...Ch. 6 - A certain voltage divider consists of three 1.0M...Ch. 6 - What is the difference between the measured and...Ch. 6 - By what percentage does the voltmeter in Problem...Ch. 6 - A 10,000/VVOM is used on the 10 V scale to measure...Ch. 6 - If a DMM with 10M input resistance is used instead...Ch. 6 - A resistor of unknown value is connected to a...Ch. 6 - A bridge network is shown In Figure 6-80. To what...Ch. 6 - Determine the value of RX in the balance bridge in...Ch. 6 - Determine the outpur voltage of the unbalanced...Ch. 6 - Reduce the circuit in Figure 6-83 to its Thevenin...Ch. 6 - For each circuit in Figure 6-84, determine the...Ch. 6 - Determine the voltage and current for R1 in Figure...Ch. 6 - Determin the value of a load resistor connected...Ch. 6 - A certain Thevenin equivalent circuit has a...Ch. 6 - Determine the value of RL in Figure 6-84(a) for...Ch. 6 - In Figure 6-86, use ther superposition therorem to...Ch. 6 - In Figure 6-86, What is the curent through R2?...Ch. 6 - Is the voltmeter reading in Figure 6-87 correct?...Ch. 6 - If R2 in Figure 6-88 opens, what voltages will be...Ch. 6 - Check the meter readings in Figure 6-89 and locate...Ch. 6 - Determine the voltage you would expect to measure...Ch. 6 - Determine the voltage you would expect to measure...Ch. 6 - In each circuit of Figure 6-90, identify the...Ch. 6 - Draw the schematic of the PC board layout in...Ch. 6 - 1For the circuit shown in Figure 6-92, calculate...Ch. 6 - Determine the total resistance and the voltage at...Ch. 6 - Determine the total resistance between terminals A...Ch. 6 - What is the voltage across each resistor in Figure...Ch. 6 - Determine the voltage, VAB. in Figure 6-95. FIGURE...Ch. 6 - Find the value of R2 in Figure 6-96. FIGURE 6-96Ch. 6 - Determine the total resistance and the voltage at...Ch. 6 - Develop a voltage divider to provide a 6 V output...Ch. 6 - Determine the resistance values for a voltage...Ch. 6 - Using the superposition therorem, calculate the...Ch. 6 - Find the current through RL in Figure 6-99. FIGURE...Ch. 6 - Using Thevenin’s theorem, find the voltage...Ch. 6 - Determine VOUT for the circuit in Figure 6-101 for...Ch. 6 - Develop a schematic for the double-sided PC board...Ch. 6 - Lay out a PC board for the circuit in Figure...Ch. 6 - The voltage divider in Figure 6-103 has a switched...Ch. 6 - Figure 6-104 shows a dc biasing arrangement for a...Ch. 6 - Look at the voltmeters in Figure 6-105 and...Ch. 6 - Are the voltmeter reading in Figure 6-106 correct?...Ch. 6 - There is one fault in Figure 6-107. Bases on the...Ch. 6 - Look at the voltmeters in Figure 6-108 and...Ch. 6 - Determine the voltmeter reading in Figure 6-108 if...Ch. 6 - Open file P06-64; files are found at...Ch. 6 - www.prenhall.com/floyd. 65. Open file P06-65 and...Ch. 6 - www.prenhall.com/floyd. 66. Open file P06-66 and...Ch. 6 - www.prenhall.com/floyd. 67. Open file P06-67 and...Ch. 6 - www.prenhall.com/floyd. 68. Open file P06-68 and...Ch. 6 - www.prenhall.com/floyd. 69. Open file P06-69 and...Ch. 6 - www.prenhall.com/floyd. 70. Open file P06-70 and...Ch. 6 - www.prenhall.com/floyd. 71. Open file P06-71 and...
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