ELECTRICITY FOR THE TRADES W/ACCESS
3rd Edition
ISBN: 9781264605309
Author: Petruzella
Publisher: MCG
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Textbook Question
Chapter 5.2, Problem 5RQ
Two 12-V, 10-W lamps are connected in parallel to a 12-VDC source.
- a. How many current paths are produced?
- b. What is the value of the voltage drop across each lamp?
- c. Comment on the brightness of each lamp (full or dim). Why?
- d. Assume that one lamp burns open (or out). What affect, if any, does this have on the other lamp? Why?
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PSD
A certain signal f(t) has the following PSD (assume 12 load):
| Sƒ(w) = π[e¯\w\ + 8(w − 2) + +8(w + 2)]
(a) What is the mean power in the bandwidth w≤ 1 rad/sec?
(b) What is the mean power in the bandwidth 0.99 to 1.01 rad/sec?
(c) What is the mean power in the bandwidth 1.99 to 2.01 rad/sec?
(d) What is the total mean power in (t)?
Pav=
+
2T
SfLw) dw
- SALW)
An AM modulation waveform signal:-
p(t)=(8+4 cos 1000πt + 4 cos 2000πt) cos 10000nt
(a) Sketch the amplitude spectrum of p(t).
(b) Find total power, sideband power and power efficiency.
(c) Find the average power containing of each sideband.
Can you rewrite the solution because it is
unclear?
AM
(+) = 8(1+ 0.5 cos 1000kt +0.5 ros 2000ks)
=
cos 10000 πt.
8 cos wat + 4 cos wit + 4 cos Wat coswet.
-Jet
jooort
J11000 t
= 4 e
jqooort jgoort
+4e
+ e
+e
j 12000rt.
12000 kt
+
e
+e
jooxt
igoo t
te
(w) = 8ES(W- 100007) + 8IS (W-10000)
USB
Chapter 5 Solutions
ELECTRICITY FOR THE TRADES W/ACCESS
Ch. 5.1 - Prob. 1RQCh. 5.1 - Polarity markings are shown on symbols...Ch. 5.1 - Compare the type of voltage produced by a solar...Ch. 5.1 - Explain how circuit breakers and fuses protect a...Ch. 5.1 - What are the two basic functions of a switch?Ch. 5.1 - Compare the operation of a normally open and...Ch. 5.1 - What type of circuit component is a light bulb...Ch. 5.1 - In general, what is the function of resistors...Ch. 5.1 - Two wires are shown on an electrical diagram...Ch. 5.1 - Give one advantage and one limitation of the...
Ch. 5.1 - Explain why schematic diagrams are easier to read.Ch. 5.1 - What is a wiring diagram intended to show?Ch. 5.1 - Prob. 13RQCh. 5.1 - The one-line diagram is often used with a power...Ch. 5.2 - What best describes a simple circuit?Ch. 5.2 - A lamp is to turn ON when either one or the other...Ch. 5.2 - What connection of two or more switches can be...Ch. 5.2 - Three 120-V, 40-W incandescent lamps are connected...Ch. 5.2 - Two 12-V, 10-W lamps are connected in parallel to...Ch. 5.2 - A control system calls for a light to come on when...Ch. 5.2 - One bulb in a 20-string series-connected holiday...Ch. 5.2 - Prob. 8RQCh. 5.2 - Prob. 9RQCh. 5.2 - Prob. 10RQ
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- Can you rewrite the solution because it is unclear? AM (+) = 8(1+0.5 cos 1000kt +0.5 ros 2000 thts) = cos 10000 πt. 8 cos wat + 4 cos wit + 4 cos Wat coswet. J4000 t j11000rt $14+) = 45 jqooort +4e + e + e j 12000rt. 12000 kt + e +e +e Le jsoort -; goon t te +e Dcw> = 885(W- 100007) + 8 IS (W-10000) - USBarrow_forwardCan you rewrite the solution because it is unclear? Q2 AM ①(+) = 8 (1+0.5 cos 1000πt +0.5 ros 2000kt) $4+) = 45 = *cos 10000 πt. 8 cos wat + 4 cosat + 4 cos Wat coswet. j1000016 +4e -j10000πt j11000Rt j gooort -j 9000 πt + e +e j sooort te +e J11000 t + e te j 12000rt. -J12000 kt + с = 8th S(W- 100007) + 8 IS (W-10000) <&(w) = USB -5-5 -4-5-4 b) Pc 2² = 64 PSB = 42 + 4 2 Pt Pc+ PSB = y = Pe c) Puss = PLSB = = 32 4² = 8 w 32+ 8 = × 100% = 140 (1)³×2×2 31 = 20% x 2 = 3w 302 USB 4.5 5 5.6 6 ms Ac = 4 mi = 0.5 mz Ac = 4 ५ M2 = =0.5arrow_forwardA. Draw the waveform for the following binary sequence using Bipolar RZ, Bipolar NRZ, and Manchester code. Data sequence= (00110100) B. In a binary PCM system, the output signal-to-quantization ratio is to be hold to a minimum of 50 dB. If the message is a single tone with fm-5 kHz. Determine: 1) The number of required levels, and the corresponding output signal-to-quantizing noise ratio. 2) Minimum required system bandwidth.arrow_forward
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