Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 10, Problem 5RQ
Name five conditions that must be met for running conductors in parallel.
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Chapter 10 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 10 - What is the maximum temperature rating of Type...Ch. 10 - 2. Name two types of conductor insulation designed...Ch. 10 - A 10 AWG copper conductor with Type THW insulation...Ch. 10 - 4. Six 1/0 aluminum conductors are to be run in a...Ch. 10 - Name five conditions that must be met for running...Ch. 10 - What is the largest solid (nonstranded) conductor...Ch. 10 - Can Type TW cable be used in an area that has an...Ch. 10 - How is the grounded conductor in a flat...Ch. 10 - What three colors are ungrounded conductors not...Ch. 10 - Twenty-five 12 AWG copper conductors are run in...
Ch. 10 - A single-hase load is located 2800 ft from its...Ch. 10 - It is decided to use parallel 0000 conductors to...Ch. 10 - A three-phase motor operates on 480 V and is...Ch. 10 - You have been hired by a company to connect an...Ch. 10 - 2. You are a journeyman electrician in an...Ch. 10 - You are an electrician working in an industrial...Ch. 10 - Using the above example, determine the wire size...Ch. 10 - 1. A 2 AWG copper conductor is 450 ft long. What...Ch. 10 - 2. An 8 AWG conductor is 500 ft long and has a...Ch. 10 - 3. Three 500-kcmil copper conductors with Type RHH...Ch. 10 - 4. Eight 10 AWG aluminum conductors with Type THWN...Ch. 10 - 5. A three-phase motor is connected to 480 V and...Ch. 10 - 6. A 50-hp DC motor is connected to 250 volts. The...Ch. 10 - 7. A bank of electric heaters has a power rating...Ch. 10 - A 15-hp squirrel-cage induction motor is connected...Ch. 10 - Determine the resistance of a 16 AWG copper...Ch. 10 - Determine the ohms-per-mil-foot of an aluminum...
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- An FDM is used to multiplex two groups of signals using AM-SSB, the first group contains 25 speech signals, each has maximum frequency of 4 kHz, the second group contains 15 music signals, each has maximum frequency of 10 kHz. A guard bandwidth of 500 Hz is used bety each two signals and before the first one. 1. Find the BWmultiplexing 2. Find the BWtransmission if the multiplexing signal is modulated using AM-DSB-LC.arrow_forwardAn FM signal with 75 kHz deviation, has an input signal-to-noise ratio of 18 dB, with a modulating frequency of 15 kHz. 1) Find SNRO at demodulator o/p. 2) Find SNRO at demodulator o/p if AM is used with m=0.3. 3) Compare the performance in case 1) and 2).. Hint: for single tone AM-DSB-LC, SNR₁ = (2m²) (4)arrow_forwardFind Va and Vb using Nodal analysisarrow_forward
- 4. A battery operated sensor transmits to a receiver that is plugged in to a power outlet. The device is continuously operated. The battery is a 3.6 V coin-cell battery with a 245mAHr capacity. The application requires a bit rate of 36 Mbps and an error rate of less than 10^-3. The channel has a center frequency of 2.4 GHz, a bandwidth of 10 MHz and a noise power spectral density of 10^-14 W/Hz. The maximum distance is 36 meters and the losses in the channel attenuates the signal by 0.25 dB/meter. Your company has two families of chips that you can use. An M-ary ASK and an M-ary QAM chip. The have very different power requirements as shown in the table below. The total current for the system is the current required to achieve the desired Eb/No PLUS the current identified below: Hokies PSK Chip Set Operating Current NOT Including the required Eb/No for the application Hokies QAM Chip Set Operating Current NOT Including the required Eb/No for the application Chip ID M-ary Voltage (volts)…arrow_forwardUsing the 802.11a specifications given below, in Matlab (or similar tool) create the time domain signal for one OFDM symbol using QPSK modulation. See attached plot for the QPSK constellation. Your results should include the power measure in the time and frequency domain and comment on those results. BW 802.11a OFDM PHY Parameters 20 MHZ OBW Subcarrer Spacing Information Rate Modulation Coding Rate Total Subcarriers Data Subcarriers Pilot Subcarriers DC Subcarrier 16.6 MHZ 312.5 Khz (20MHz/64 Pt FFT) 6/9/12/18/24/36/48/54 Mbits/s BPSK, QPSK, 16QAM, 64QAM 1/2, 2/3, 3/4 52 (Freq Index -26 to +26) 48 4 (-21, -7, +7, +21) *Always BPSK Null (0 subcarrier) 52 subarriers -7 (48 Data, 4 Pilot (BPSK), 1 Null) -26 -21 0 7 21 +26 14 One Subcarrier 1 OFDM symbol 1 OFDM Burst -OBW 16.6 MHz BW 20 MHZ 1 constellation point = 52 subcarriers = one or more OFDM symbols 802.11a OFDM Physical Parameters Show signal at this point x bits do Serial Data d₁ S₁ Serial-to- Input Signal Parallel Converter IFFT…arrow_forwardFind Vb and Va using Mesh analysisarrow_forward
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