Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter S, Problem 9RQ
A padlock is used to lock out a piece of equipment. Who should have the key?
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1. In AM, 50% modulation indicates that
33.3%.11.1%).
of the total transmitted power is in the sidebands (0%,50%
2. To obtain coherent detection in AM receiver, an extra signal is added to the modulated signal, this signal
called
(PLL, IF carrier, pilot carrier, subcarrier).
3. The output spectrum of a
modulator includes upper-side, lower-side frequencies, and the carrier
frequency. (balanced, standard amplitude, SSB, none of the above)
4. When a signal is multiplied by the unit step function,
(the positive time range is suppressed, the
negative frequency range is suppressed, the negative time range is suppressed, the positive frequency range
is suppressed).
5. DSB-LC requires coherent detection at the receiver, if the type of modulation is
modulation, over modulation, critical modulation, none of them).
6. A continuous FT indicates a
7. In VSB transmission
signal. (continuous,…
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Chapter S Solutions
Delmar's Standard Textbook Of Electricity
Ch. S - What is the most important rule of electrical...Ch. S - Prob. 2RQCh. S - What range of electric current generally causes...Ch. S - What is fibrillation of the heart?Ch. S - Prob. 5RQCh. S - Who is responsible for enforcing OSHA regulations?Ch. S - Prob. 7RQCh. S - What is an MSDS?Ch. S - A padlock is used to lock out a piece of...Ch. S - A ladder is used to reach the top of a building 16...
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- I need a solution from an expert without artificial intelligence. Choose the correct answer: 1. In AMI code, the shapes of "1" and "O" are, bit dependent, not related to each other). 2. In FDM the guard band is used to decrease, maintain, not related to). 3. Higher number of levels in PCM produces, (the same, opposite to each other, next the overlap between FDM signals. (increase, (higher quantization error, less number of bits per sample, lower quantization error, the same number of bits per sample). Fe Av 4. If the maximum shift in frequency is 70 kHz and the minimum deviation in frequency of the actual signal is 109.93 MHz, what is the carrier frequency? (110 MHz, 110 kHz, 107 kHz, 102 MHz) 5. TDM of signals requires them to have the same amplitude, sampling frequency, energy). 6. In standard AM, the last step in the transmitter is subtracting, multiplying, dividing). . In digital carrier systems, PSK). (maximum frequency, maximum the carrier signal. (adding, has higher bandwidth.…arrow_forwardNeed Handwritten step by step solution. Do not use chatgpt or AIarrow_forwardA linear electrical load draws 11 A at a 0.72 lagging power factor./1 153. When a capacitor is connected, the line current dropped to 122 A and the power factor improved to 0.98 lagging. Supply frequency is 50 Hz. a. Let the current drawn from the source before and after introduction of the capacitor be 11 and 12 respectively. Take the source voltage as the reference and express 11 and 12 as vector quantities in polar form. b. Obtain the capacitor current, IC = 12 - 11, graphically as well as using complex number manipulation. Compare the results. c. Express the waveforms of the source current before (11(t)) and after (12(t)) introduction of the capacitor in the form Im sin(2лft + 0). Hand sketch them on the same graph. Clearly label your plots. d. Analytically solve i2(t) – i1(t) using the theories of trigonometry to obtain the capacitor current in the form, ¡C(t) = ICm sin(2πft + OC). Compare the result with the result in Part b.arrow_forward
- Transmission line data:Data:• Active power of the load (P): 50 kW• Power factor of the load (PF): 0.8 (lagging)• Line-to-line voltage at the load (V_LC): 13.8 kV• Line resistance (R): 2 Ω• Line inductance (L): 0.8 H• Line capacitance (C): 0.0003 F• Required series compensation: 60% of the line impedance.• Line length: 250 kmDetermine:1. Characteristic impedance and propagation constant.2. The generalized long line constants A, B, C, D.3. Total voltage, current and power at the generating end.4. Voltage regulation.5. Parameters A, B, C, D of the compensation circuit.6. New generalized constants of the power system afterseries compensation.7. Conclusion of the results obtained.arrow_forward3.18 In a single-phase half-wave ac-dc converter, the average value of the load current is 1.78 A. If the converter is operated from a 240 V, 50 Hz supply and if the average value of the output voltage is 27% of the maximum possible value, calculate the following, assume the load to be resistive. (a) Load resistance (b) Firing angle (c) Average output voltage (d) The rms load voltage (e) The rms load current (f) DC power (g) AC power (h) Rectifier efficiency (i) Form factor (j) Ripple factorarrow_forwardTo find the Fourier series for the periodic function f(x) = 2 -2 when π < x < 0 - when 0 < x < πarrow_forward
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