Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Textbook Question
Chapter 2.2, Problem 2R
What is the size of the footing for the steel Lally columns in the basement? Refer to Plan 1 of 10. (Lally is the trademark used for a concrete-filled steel cylinder used as a supporting member for wood or steel girders and beams. The Lally column was named after John Lally, born in Ireland in 1859. The term lolly is also used.) __________
__________________________________________
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Q2:
(30 Marks)
Design a DC/DC converter that produce output waveforms that shown in figures below from a
fixed DC source of 20 volts.
Vo (Volt)
14.1
IL (Amp)
13.9
2.25
1.75
† (msec)
Output voltage
0.18
0.2
t (msec)
L
0.214 0.22
Output current
6. Build the circuit shown in Figure 2 below in PSpice. Note that the power supply V1 is a
VSIN power supply in the SOURCE library. Vcc is a VDC supply found in the SOURCE
library. Model this circuit using the Time Domain (Transient) Analysis Type with a Run To
Time of 2 ms.
A. Paste your output graph showing the voltage at the base terminal, collector terminal
and at the load.
B. What is the voltage gain of the circuit? (Compare the voltage amplitude at the base
terminal input (across Rb2) to that at the collector terminal.
C. What happens to the output voltage at the collector terminal if the value of Rb1 is
reduced by a factor of 10 (to 14.7 kn)? Simulate this situation and explain the result.
D. What happens to the output voltage at the collector terminal if the value of Rb1 is
increased by a factor of 3 (to 441 k)? Simulate this situation and explain the result.
Rb1
RC
147k
1k
C2
C1
Q1
Vcc
1u
VOFF = 0
Q2N3904
10Vdc
VAMPL = 0.1V1
1u
FREQ = 2k
R_load
Rb2
Re
AC = 0
250
40k
20
Figure…
The input reactance of 1/2 dipole with radius of 1/30 is given as shown in figure below,
Assuming the wire of dipole is conductor 5.6*107
S/m, determine at f=1 GHz the
a-Loss resistance, b- Radiation efficiency
c-Reflection efficiency when the antenna is
connected to T.L shown in the figure.
Rr
Ro= 50 2
1/4
RL
-j100
[In(l/a) - 1.5]
tan(ẞl)
Chapter 2 Solutions
Electrical Wiring Residential
Ch. 2.1 - What does a plan show about electrical outlets?...Ch. 2.1 - Prob. 2RCh. 2.1 - Prob. 3RCh. 2.1 - Prob. 4RCh. 2.1 - Prob. 5RCh. 2.1 - Prob. 6RCh. 2.1 - Prob. 7RCh. 2.1 - Prob. 8RCh. 2.1 - What methods may be used to mount luminaries to an...Ch. 2.1 - What advantage does a 4 in. octagon box have over...
Ch. 2.1 - What is the size of the opening of a switch...Ch. 2.1 - Prob. 12RCh. 2.1 - Prob. 13RCh. 2.1 - Prob. 14RCh. 2.1 - Prob. 15RCh. 2.1 - Prob. 16RCh. 2.1 - Prob. 17RCh. 2.1 - Prob. 18RCh. 2.1 - Prob. 19RCh. 2.1 - Prob. 20RCh. 2.1 - Prob. 21RCh. 2.1 - Prob. 22RCh. 2.1 - Prob. 24RCh. 2.1 - Prob. 26RCh. 2.1 - Prob. 27RCh. 2.1 - Prob. 28RCh. 2.1 - Prob. 29RCh. 2.1 - Prob. 31RCh. 2.1 - Does the NEC allow metal raceways to be used with...Ch. 2.2 - Prob. 1RCh. 2.2 - What is the size of the footing for the steel...Ch. 2.2 - Prob. 3RCh. 2.2 - Prob. 4RCh. 2.2 - Prob. 5RCh. 2.2 - Prob. 6RCh. 2.2 - How far is the front garage wall from the curb?...Ch. 2.2 - How far is the side garage wall from the property...Ch. 2.2 - Prob. 9RCh. 2.2 - What is the purpose of the I-beams that rest on...Ch. 2.2 - Where is access to the attic provided?...Ch. 2.2 - Prob. 13RCh. 2.2 - Prob. 14RCh. 2.2 - Prob. 15RCh. 2.2 - Prob. 16RCh. 2.2 - What is the stud size for the partitions between...Ch. 2.2 - Who is to furnish the range hood?...Ch. 2.2 - Who is to install the range hood?...
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