ELECTRICAL WIRING:RESIDENTAL-6 PLANS
18th Edition
ISBN: 9781305098329
Author: MULLIN
Publisher: CENGAGE L
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Question
Chapter 23.1, Problem 13R
a.
To determine
Find the current drawn by 7.5 kW.
b.
To determine
Find the current drawn by 15 kW.
c.
To determine
Find the current drawn by 20 kW.
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1) Maximum dimension of antenna is 0.5m and operating frequency is 9 GHz, thus the radius of
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3.265m
2) If distance between transmitter and receiver is 2km and the signal carrier frequency is
300kHz
Rapidly time-varying fields DC field Quasi-static field None
3) The polarization mismatch factor for horizontal polarization wave incident on +z axis is
is if the antenna polarization is circular
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TE
5) The normalized radiation intensity of an antenna is represented by:
U(6)=cos²(0) cos2 (30), w/s Half-power beamwidth HPBW is......
28.75
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Choose the best answer of the following:
1- quasi-static electromagnetic field is the
a) low frequency b)high frequency c) time independent d) none of the above
2- Displacement current is taken to be negligible (compared to the conduction current) if
a) σ>>wε b)σ << wɛ c) σ =0 d) (a and c)
3- The transmission line act as inductor when it terminated by:
a) Open circuit load b) short circuit load c)matched load d)none of the above
4- The scattering aperture equals to the effective aperture when the antenna is:
a) Complex conjugate matching b) short circuit c) open circuit d) none of the above
5- The isotropic point source has directivity of:
a) Infinity b)1 c) 0 d)1.5
I selected a DC-DC converter capable of delivering 120 VDC from a 600 VDC input. When I reached out to the manufacturer, they asked for the total power consumption the converter would need to handle.To estimate this, I calculated the power requirements for the components that will use the 120 VDC supply: interior lighting, end lights, and buzzers. The breakdown is as follows:- Light Bulbs: 16 bulbs at 10 W each = 160 W- Buzzers: 2 buzzers at 5 W each = 10 W- End Lights: 2 lights at 15 W each = 30 W
This results in a total estimated power demand of 200 W.My concern is whether I should request a higher wattage rating for the converter to provide sufficient tolerance and ensure the system operates efficiently without risking an overload.
Note: The DC power system is designed specifically for a trolley
Chapter 23 Solutions
ELECTRICAL WIRING:RESIDENTAL-6 PLANS
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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