ELECTRICAL WIRING:RESIDENT.-TEXT (PB)
19th Edition
ISBN: 9781337116213
Author: MULLIN
Publisher: CENGAGE L
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Chapter 23.1, Problem 11R
Receptacle outlets furnished as part of a permanently installed electric baseboard heater, when not connected to the heater’s branch circuit, (may) (may not) be counted as the required receptacle outlet for the space occupied by the baseboard heater. Electric baseboard heaters (shall) (shall not) be installed beneath wall receptacle outlets unless the instructions furnished with the heaters indicate that it is acceptable to install the heater below a receptacle outlet. (Circle the correct answers.)
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Choose the correct answer to the following questions:
1- What is the total power radiated in Watts for the power density W =
a) 4π²
b) 8m²/3
2- Fresnel zone is also called as
sine
W/m²?
3r²
c) 4π²/3
d) 2π²/3
a) Near Field b) Far Field
c) Electrostatic Field
d) Reactive Field
3- The far-field distance at 900 MHz, if the maximum antenna dimension is 0.75 m is....
a) 3.375 m
b) 3.5m
c) 3.375 cm
d) none
4- The antenna gain is
on input power to antenna and
on power due to ohmic losses.
c) Independent, dependent d)
a) Independent, independent b) Dependent, independent
Dependent, dependent
5- If beam width of the antenna increases, then directivity.
a) Decreases b) Increases c) Remains unchanged d) Depends on type of antenna
please solve this and clarify each step. thanks
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
Avg/4
RL
-j100
[In(l/a) 1.5]
tan(ẞ1)
Chapter 23 Solutions
ELECTRICAL WIRING:RESIDENT.-TEXT (PB)
Ch. 23.1 - a. What is the allowance in watts made for...Ch. 23.1 - What are some of the advantages of electric...Ch. 23.1 - List the different types of electric heating...Ch. 23.1 - There are two basic voltage classifications for...Ch. 23.1 - What device is required when the total connected...Ch. 23.1 - Prob. 6RCh. 23.1 - Prob. 7RCh. 23.1 - A certain type of control connects electric...Ch. 23.1 - What advantages does a 240-volt heating unit have...Ch. 23.1 - The white wire of a cable may be used to connect...
Ch. 23.1 - Receptacle outlets furnished as part of a...Ch. 23.1 - The branch circuit supplying a fixed electric...Ch. 23.1 - Prob. 13RCh. 23.1 - For ballpark calculations, the wattage output of a...Ch. 23.1 - A central electric furnace heating system is...Ch. 23.1 - What section of the Code provides the correct...Ch. 23.1 - Electric heating cable embedded in plaster, or...Ch. 23.2 - Prob. 1RCh. 23.2 - Prob. 2RCh. 23.2 - Prob. 3RCh. 23.2 - a. Must an air conditioner installed in a window...Ch. 23.2 - Prob. 5RCh. 23.2 - What is the Code requirement for receptacles...Ch. 23.2 - Prob. 7RCh. 23.2 - When the nameplate on an air-conditioning unit...Ch. 23.2 - Prob. 9RCh. 23.2 - Match the following terms with the statement that...Ch. 23.2 - The disconnect for an air conditioner or heat pump...
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