ENGINEERING CIRCUIT...(LL)>CUSTOM PKG.<
9th Edition
ISBN: 9781260540666
Author: Hayt
Publisher: MCG CUSTOM
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Chapter 4, Problem 31E
To determine
Find the unknown voltages
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4. Again assume each channel of our power supply can provide 30 V and we want to run a
60 V hair dryer motor. So, we again put the two channels in series for double the voltage.
But, if you try this with a non-isolated supply, bad things will happen. Don't do that. The
following depicts a circuit where internally the supplies have a common ground (i.e., they
are not isolated).
Non-Isolated Power Supply
Droop2
ww
1mQ
Channel2
30V
3.3A max
Channel1
30V
3.3A max
Droop1
1mQ
I
I
I
1
I
Red
1
I
1
Black
Red
Black
JumperCable
26mQ
15A max
Motor
1200
Needs -60V
(a) Show that the current through the jumper cable will greatly exceed its current rating
(which, as shown in the schematic, is 15 A). If this happens for more than a very short
time, it will melt.
(b) Show that the current through Channell greatly exceeds its maximum current rating.
If the short circuit protection circuitry doesnt activate quickly, you will fry your power
supply.
Hint: You can redraw the circuit in a manner similar to…
Q4. Using the nodal-analysis, calculate Vo and Pacn in Figure Q4.
8002
202
402
V.
75V
6A
2002
502
Figure Q4
1. For the fixed-bias configuration of Fig. 4.118, determine:
a. IBg'
16 V
b. Icg
c. VCEg
Ico
1.8 k22
510 kQ2
VB
IBQ
Vc
VCEQ
B=120
VE
Chapter 4 Solutions
ENGINEERING CIRCUIT...(LL)>CUSTOM PKG.<
Ch. 4.1 - For the circuit of Fig. 4.3, determine the nodal...Ch. 4.1 - For the circuit of Fig. 4.5, compute the voltage...Ch. 4.1 - For the circuit of Fig. 4.8, determine the nodal...Ch. 4.2 - For the circuit of Fig. 4.11, compute the voltage...Ch. 4.3 - Determine i1 and i2 in the circuit in Fig. 4.19....Ch. 4.3 - Determine i1 and i2 in the circuit of Fig 4.21....Ch. 4.3 - Determine i1 in the circuit of Fig. 4.24 if the...Ch. 4.4 - Determine the current i1 in the circuit of Fig....Ch. 4.4 - Determine v3 in the circuit of Fig. 4.28. FIGURE...Ch. 4 - Solve the following systems of equations: (a) 2v2 ...
Ch. 4 - (a) Solve the following system of equations:...Ch. 4 - (a) Solve the following system of equations:...Ch. 4 - Correct (and verify by running) the following...Ch. 4 - In the circuit of Fig. 4.35, determine the current...Ch. 4 - Calculate the power dissipated in the 1 resistor...Ch. 4 - For the circuit in Fig. 4.37, determine the value...Ch. 4 - With the assistance of nodal analysis, determine...Ch. 4 - Prob. 9ECh. 4 - For the circuit of Fig. 4.40, determine the value...Ch. 4 - Use nodal analysis to find vP in the circuit shown...Ch. 4 - Prob. 12ECh. 4 - Prob. 13ECh. 4 - Determine a numerical value for each nodal voltage...Ch. 4 - Prob. 15ECh. 4 - Using nodal analysis as appropriate, determine the...Ch. 4 - Prob. 17ECh. 4 - Determine the nodal voltages as labeled in Fig....Ch. 4 - Prob. 19ECh. 4 - Prob. 20ECh. 4 - Employing supernode/nodal analysis techniques as...Ch. 4 - Prob. 22ECh. 4 - Prob. 23ECh. 4 - Prob. 24ECh. 4 - Repeat Exercise 23 for the case where the 12 V...Ch. 4 - Prob. 26ECh. 4 - Prob. 27ECh. 4 - Determine the value of k that will result in vx...Ch. 4 - Prob. 29ECh. 4 - Prob. 30ECh. 4 - Prob. 31ECh. 4 - Determine the currents flowing out of the positive...Ch. 4 - Obtain numerical values for the two mesh currents...Ch. 4 - Use mesh analysis as appropriate to determine the...Ch. 4 - Prob. 35ECh. 4 - Prob. 36ECh. 4 - Find the unknown voltage vx in the circuit in Fig....Ch. 4 - Prob. 38ECh. 4 - Prob. 39ECh. 4 - Determine the power dissipated in the 4 resistor...Ch. 4 - (a) Employ mesh analysis to determine the power...Ch. 4 - Define three clockwise mesh currents for the...Ch. 4 - Prob. 43ECh. 4 - Prob. 44ECh. 4 - Prob. 45ECh. 4 - Prob. 46ECh. 4 - Prob. 47ECh. 4 - Prob. 48ECh. 4 - Prob. 49ECh. 4 - Prob. 50ECh. 4 - Prob. 51ECh. 4 - Prob. 52ECh. 4 - For the circuit represented schematically in Fig....Ch. 4 - The circuit of Fig. 4.80 is modified such that the...Ch. 4 - The circuit of Fig. 4.81 contains three sources....Ch. 4 - Solve for the voltage vx as labeled in the circuit...Ch. 4 - Consider the five-source circuit of Fig. 4.83....Ch. 4 - Replace the dependent voltage source in the...Ch. 4 - After studying the circuit of Fig. 4.84, determine...Ch. 4 - Prob. 60ECh. 4 - Employ LTspice (or similar CAD tool) to verify the...Ch. 4 - Employ LTspice (or similar CAD tool) to verify the...Ch. 4 - Employ LTspice (or similar CAD tool) to verify the...Ch. 4 - Verify numerical values for each nodal voltage in...Ch. 4 - Prob. 65ECh. 4 - Prob. 66ECh. 4 - Prob. 67ECh. 4 - Prob. 68ECh. 4 - Prob. 69ECh. 4 - (a) Under what circumstances does the presence of...Ch. 4 - Referring to Fig. 4.88, (a) determine whether...Ch. 4 - Consider the LED circuit containing a red, green,...Ch. 4 - The LED circuit in Fig. 4.89 is used to mix colors...Ch. 4 - A light-sensing circuit is in Fig. 4.90, including...Ch. 4 - Use SPICE to analyze the circuit in Exercise 74 by...
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