Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 32, Problem 11RQ
What is the function of the field-discharge resistor?
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R1
ww
R₂
11
Vout
Rs
ww
Is
12
In the circuit depicted below.
Is=2mA, R₁ = 100k, R2 = 7k2, R3 = 3k2, R4 = 4k2.
Assuming ideal op amp behaviour, find:
a) The voltage at the non-inverting input (V+), in V, accurate to within 1%
V+=
14
RA
b) The current flowing through the resistor R3 (13), in mA, accurate to within 1%.
13-
ΜΑ
c) Calculate the output voltage (Vout), in V, accurate to within 1%.
Vout =
d) Assume that the op-amp is now supplied by +5V, and that the output can swing rail-to-rail. What is the maximum magnitude of the input current that can be supplied, in mA, before the output clips to rails? State your answer accurate to within 1%.
e) We want to modify this amplifier so its transimpedance gain is 2000V/A, comparing source current to op-amp output voltage. Assuming other components are kept as is, what value of R2 will achieve this? State your answer in k2 accurate to within 1%.
R2=
ΚΩ
IS.ma
MA
A factory load draws real power of 15kW at voltage of 220V (rms) and operates at a lagging power factor of 0.80. We'd like to be operating at a power factor of 0.99, and this can be done by placing a capacitor in parallel with the load. The power supply to this load operates at a frequency of 50Hz.
a) Compute the apparent power (S, in kVA) and original reactive power (Q, in kVAR), of the factory load, to within 1% accuracy.
KVA
Q=
KVAR
b) Compute the new reactive power (Q, in kVAR) based on the desired power factor (p.f. = 0.99), to within 1% accuracy.
KVAR
c) Calculate the difference in reactive power, in kVAR, that the load must show to change from a p.f. of 0.75 to 0.99, which must be provided by the capacitor, to within 1% accuracy.
Difference
KVAR
d)
Determine the size of the capacitor (in millifarads, mF) required to correct the power factor to 0.99 lagging, to within 1% accuracy.
C =
mF
1016
1015
1014
1013
1012
13
1011
1010
601
(çuວ) uorງະuວວuo alueວ ວrsutu
10°
10'
106
is
105
002
300
400
2. Determine the equilibrium electron and hole concentrations inside a uniformly doped sample of
Si under the following conditions. (n; =1010/cm³ at 300K)
a) T 300 K, NA << ND, ND = 1015/cm³
b) T = 300 K, NA = 9X1015/cm³, ND = 1016/cm³
c) T = 450 K, NA = 0, ND = 1014/cm³
d) T = 650 K, NA = 0, ND =
1014/cm³
3. For each of the conditions specified in problem 2, determine the position of Ei, computer EF-Ei,
and draw a carefully dimensioned energy band diagram for the Si sample.
(Note: EG(Si)=1.08eV at 450 K and 1.015eV at 650 K)
500
T(K)
009
700
Chapter 32 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 32 - What are the three basic types of three-phase...Ch. 32 - What is the principle of operation of all...Ch. 32 - What is synchronous speed?Ch. 32 - What two factors determine synchronous speed?Ch. 32 - Prob. 5RQCh. 32 - Name three factors that determine the torque...Ch. 32 - Is the synchronous motor an induction motor?Ch. 32 - Prob. 8RQCh. 32 - Why must a synchronous motor never be started when...Ch. 32 - Name three characteristics that make the...
Ch. 32 - What is the function of the field-discharge...Ch. 32 - Why can an induction motor never operate at...Ch. 32 - A squirrel-cage induction motor is operating at...Ch. 32 - Prob. 14RQCh. 32 - Prob. 15RQCh. 32 - Prob. 16RQCh. 32 - Name three factors that determine the amount of...Ch. 32 - Why will the rotor of a wound-rotor motor not turn...Ch. 32 - Why is the starting torque per A of starting...Ch. 32 - When is a synchronous motor a synchronous...Ch. 32 - What determines when a synchronous motor is at...Ch. 32 - How can a synchronous motor be made to have a...Ch. 32 - Is the excitation current of a synchronous motor...Ch. 32 - Prob. 24RQCh. 32 - Prob. 25RQCh. 32 - You are working as a plant electrician. It is your...Ch. 32 - You have been given the task of connecting a...Ch. 32 - You are an electrician working in an industrial...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- a) A silicon wafer is uniformly doped p-type with NA=1015/cm³. At T=0K, what are the equilibrium hole and electron concentrations? b) A semiconductor is doped with an impurity concentration N such that N >> n; and all the impurities are ionized. Also, n = N and p = n;²/N. Is the impurity a donor or an acceptor? Explain. c) The electron concentration in a piece of Si maintained at 300K under equilibrium conditions is 105/cm³. What is the hole concentration? d) For a silicon sample maintained at T=300K, the Fermi level is located 0.259 eV above the intrinsic Fermi level. What are the hole and electron concentrations? e) In a nondegenerate germanium sample maintained under equilibrium conditions near room temperature, it is known that n=10¹³/cm³, n = 2p, and NA= 0. Determine n and ND.arrow_forwardWaveform: Triangle wave Frequency: 5000 Hz Duty Cycle: 40% Amplitude: 8 Vp On the oscilloscope, set the timebase to 100 μs/Div. Now run the simulation and measure the rise time and fall time of the triangle wave in V/100 μs. Are these values consistent with a 40% duty cycle? Look at the text instructions and images and tell me if my calculations seem right. change in voltage value was taken from the virtual oscilliscope. The change in voltage slope and convert to V/100us are what I am trying to ensure are correct. (Please don't just check that only duty cycle is correct. Please check if convert to V/100us is correct as well.)arrow_forwardWaveform: Triangle wave Frequency: 5000 Hz Duty Cycle: 40% Amplitude: 8 Vp On the oscilloscope, set the timebase to 100 μs/Div. Now run the simulation and measure the rise time and fall time of the triangle wave in V/100 μs. Are these values consistent with a 40% duty cycle? I am trying to calculate V/100us. (T2−T1) rise=32.474uS (T2−T1) fall=47.755uS Minimum Voltage (V_min): 786.026 mV = 0.786026 V Maximum Voltage (V_max): 7.206 V Slope(rise) =6.419974/32.474×10^6 = 197,579.76,V/s *1,s/100,μs =197,579.76,V/100us I am checking the answer and I am concerned for V/100us =197,579.76,V/100us is to high? Please help me verify the answer for V/100us is correct. (I just need the calculations from my measurments) any insight is appreciated I did not post the pics of my virtual oscilliscope.arrow_forward
- Connect the function generator and the scope, as shown in the same example. Set the function generator as follows: Waveform: Triangle wave Frequency: 5000 Hz Duty Cycle: 40% Amplitude: 8 Vp On the oscilloscope, set the timebase to 100 μs/Div. Now run the simulation and measure the rise time and fall time of the triangle wave in V/100 μs. Are these values consistent with a 40% duty cycle? How do I answer this question? what is V/100us?arrow_forwardhelp on this question about noise figure?arrow_forwardA given FM broadcast receiver has an equivalent noise bandwidth of 200 kHz, a baseband bandwidth of 15 kHz, and a noise figure of 6 dB. What should be the received RF signal power so that the variable thermal noise is less than 60 dBm0, if the 800 Hz test signal and 0 dBm0 level produces a frequency deviation of 75 kHz?arrow_forward
- please redraw the equivalent circuit to make it look more realistic or correct anything that you see looking incorrect. this is the equivalent circuits for the transmission lines “Duhaney Park - WashingtonBoulevard” and “Washington Boulevard – Three Miles”.arrow_forwardAdd the following binary numbers: 1011 + 101, 1011 + 1101.arrow_forwardSolve this problem to understand and to memorizedarrow_forward
- From Bus To Bus Voltage (KV) MVA Limit R (pu) X (pu) B (pu) Hunts Bay A Three Miles 69 520 0.01335 0.04211 0.00640 Hunts Bay A Duhaney Park 69 410 0.05695 0.17388 0.01700 Hunts Bay A Rockfort 69 410 0.05811 0.17632 0.02460 Washington Blvd Duhaney Park 69 410 0.05403 0.22304 0.02190 WKHR Washington Blvd 69 410 0.06701 0.17103 0.01730 Hope WKHR 69 410 0.01938 0.05917 0.02640 Three Miles Washington Blvd 69 410 0.04699 0.19797 0.01870 Note: Reactance values are also used for zero-sequence reactance in later parts of the lab. From Bus To Bus Voltage (KV) MVA Limit X (pu) R (pu) Hunts Bay Gen 1 HBA 13.8/69 60 0.163482 0.010218 Hunts Bay Gen 2 HBA 13.8/69 60 0.163482 0.010218 Rockfort Gen Rockfort Load 13.8/69 60 0.163482 0.010218 12 MW 4Mvar 5MW 4Mvar sack 25 MW IME BMW 1.00 pu 1.00 pu Hunts Bay Gen 2 2 Mvar 19 MW 6 Mar Hunts Bay Gen 1 0.99 pu 0.98 p 0.97 pu Hunts Bay A Duhaney Park Washington Boulevard 14.0803 MW 121.1779 AMP 1.3500 Mer 55.9040 AMP 5.9414 MW 2,6002 Mar 12.8346 MW 15195 Ma…arrow_forwardSolve these 2 questions in detail to understand and memorizedarrow_forwardplease answer this with tetalarrow_forward
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