
EBK FUNDAMENTALS OF ELECTRIC CIRCUITS
6th Edition
ISBN: 8220102801448
Author: Alexander
Publisher: YUZU
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Chapter 19.5, Problem 9PP
To determine
Calculate currents
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1- A squirrel cage induction motor is not selected when
(A) initial cost is the main consideration (B) maintenance cost is to be kept low
(C) higher starting torque is the main consideration (D) all above considerations are involved
2- The torque of an induction motor is ..............
(A) directly proportional to slip (B) inversely proportional to slip...
(C) proportional to the square of the slip (D) none of the above
3- Insertion of resistance in the stator of an induction motor.
(A) increases the load torque (B) decreases the starting torque
(C) increases the starting torque (D) none of above
tool to slip
10 or of the above
4- Increase in the length of air-gap in the induction motor results in the increasing of its
(A) air-gap flux (B) magnetizing current
(C) speed (D) power factor
5- In cumulatively cascade method for speed controlling, if PA is the number of poles of main motor and
PB is the number of poles of auxiliary motor. Then the speed of the set…
Chose the correct answer:
1- The resultant flux in stator winding of three-phase induction motor is equal to
(A) Maximum value of flux due to any phase
(B) Twice of the maximum value of flux due to any phase.
(C) 0.5 times the maximum value of flux due to any phase
(D) 1.5 times the maximum value of flux due to any phase
2- Which one of the following starters cannot be used for 3-phase, star - connected, slip-ring induction
motor?
(A) Auto-transformer starter (B) Star-delta starter
(C) Direct-on-line starter
(D) Rotor resistance starter
3- The crawling in the induction motor is caused by..............
(A) low voltage supply (B) high loads
(D) improper design of the machine
(C) harmonics developed in the motor
4- The 'cogging' of an induction motor can be avoided by...........
(A) good ventilation
(B) using DOL starter
(C) star-connecting of stator winding
(D) having number of rotor slots more or less than the number of stator slots
5- The method which can be used for the speed control…
Manual solution only, no Al used
Chapter 19 Solutions
EBK FUNDAMENTALS OF ELECTRIC CIRCUITS
Ch. 19.2 - Find the z parameters of the two-port network in...Ch. 19.2 - Calculate I1 and I2 in the two-port of Fig. 19.11....Ch. 19.3 - Obtain the y parameters for the T network shown in...Ch. 19.3 - Obtain the y parameters for the circuit in Fig....Ch. 19.4 - Determine the h parameters for the circuit in Fig....Ch. 19.4 - Find the impedance at the input port of the...Ch. 19.4 - For the ladder network in Fig. 19.30, determine...Ch. 19.5 - Find the transmission parameters for the circuit...Ch. 19.5 - Prob. 9PPCh. 19.6 - Determine [y] and [T] of a two-port network whose...
Ch. 19.6 - Find the z parameters of the op amp circuit in...Ch. 19.7 - Find V2/Vs in the circuit in Fig. 19.43. Figure...Ch. 19.7 - Obtain the y parameters for the network in Fig....Ch. 19.7 - Obtain the ABCD parameter representation of the...Ch. 19.8 - Obtain the h parameters for the network in Fig....Ch. 19.8 - Obtain the z parameters of the circuit in Fig....Ch. 19.9 - For the transistor amplifier of Fig. 19.60, find...Ch. 19.9 - Prob. 18PPCh. 19 - For the single-element two-port network in Fig....Ch. 19 - For the single-element two-port network in Fig....Ch. 19 - For the single-element two-port network in Fig....Ch. 19 - For the single-element two-port network in Fig....Ch. 19 - For the single-element two-port network in Fig....Ch. 19 - For the single-element two-port network in Fig....Ch. 19 - When port 1 of a two-port circuit is...Ch. 19 - A two-port is described by the following...Ch. 19 - If a two-port is reciprocal, which of the...Ch. 19 - Prob. 10RQCh. 19 - Obtain the z parameters for the network in Fig....Ch. 19 - Find the impedance parameter equivalent of the...Ch. 19 - Find the z parameters of the circuit in Fig....Ch. 19 - Using Fig. 19.68, design a problem to help other...Ch. 19 - Obtain the z parameters for the network in Fig....Ch. 19 - Compute the z parameters of the circuit in Fig....Ch. 19 - Calculate the z parameters of the circuit in Fig....Ch. 19 - Find the z parameters of the two-port in Fig....Ch. 19 - The y parameters of a network are:...Ch. 19 - Construct a two-port that realizes each of the...Ch. 19 - Determine a two-port network that is represeted by...Ch. 19 - For the circuit shown in Fig. 19.73, let z=106412...Ch. 19 - Determine the average power delivered to ZL = 5 +...Ch. 19 - For the two-port network shown in Fig. 19.75, show...Ch. 19 - For the two-port circuit in Fig. 19.76,...Ch. 19 - For the circuit in Fig. 19.77, at = 2 rad/s, z11...Ch. 19 - Prob. 17PCh. 19 - Calculate the y parameters for the two-port in...Ch. 19 - Using Fig. 19.80, design a problem to help other...Ch. 19 - Find the y parameters for the circuit in Fig....Ch. 19 - Obtain the admittance parameter equivalent circuit...Ch. 19 - Obtain the y parameters of the two-port network in...Ch. 19 - (a) Find the y parameters of the two-port in Fig....Ch. 19 - Find the resistive circuit that represents these y...Ch. 19 - Prob. 25PCh. 19 - Calculate [y] for tle two-port in Fig. 19.85.Ch. 19 - Find the y parameters for the Circuit in Fig....Ch. 19 - In the circuit of Fig. 19.65, the input port is...Ch. 19 - In the bridge circuit of Fig. 19.87, I1 = 20 A and...Ch. 19 - Find the h parameters for the networks in Fig....Ch. 19 - Determine the hybrid parameters for the network in...Ch. 19 - Using Fig. 19.90, design a problem to help other...Ch. 19 - Obtain the h parameters for the two-port of Fig....Ch. 19 - Obtain the h and g parameters of the two-port in...Ch. 19 - Determine the h parameters for the network in Fig....Ch. 19 - For the two-port in Fig. 19.94. h=16320.01S Find:...Ch. 19 - The input port of the circuit in Fig. 19.79 is...Ch. 19 - The h parameters of the two-port of Fig. 19.95...Ch. 19 - Obtain the g parameters for the wye circuit of...Ch. 19 - Using Fig. 19.97, design a problem to help other...Ch. 19 - For the two-port in Fig. 19.75, show that...Ch. 19 - The h parameters of a two-port device are given by...Ch. 19 - Find the transmission parameters for the...Ch. 19 - Using Fig. 19.99, design a problem to help other...Ch. 19 - Find the ABCD parameters for the circuit in Fig....Ch. 19 - Find the transmission parameters for the circuit...Ch. 19 - Obtain the ABCD parameters for the network in Fig....Ch. 19 - For a two-port, let A = 4, B = 30 , C = 0.1 S, and...Ch. 19 - Using impedances in the s-domain, obtain the...Ch. 19 - Derive the s-domain expression for the t...Ch. 19 - Obtain the t parameters for the network in Fig....Ch. 19 - (a) For the T network in Fig. 19.106, show that...Ch. 19 - Prob. 53PCh. 19 - Show that the transmission parameters of a...Ch. 19 - Prove that the g parameters can be obtained from z...Ch. 19 - For the network of Fig. 19.107, obtain VoVs....Ch. 19 - Given the transmission parameters T=32017 obtain...Ch. 19 - Design a problem to help other students better...Ch. 19 - Given that g=0.06S0.40.22 determine: (a) [z] (b)...Ch. 19 - Design a T network necessary to realize the...Ch. 19 - For the bridge circuit in Fig. 19.108, obtain: (a)...Ch. 19 - Find the z parameters of the op amp circuit in...Ch. 19 - Determine the z parameters of the two-port in Fig....Ch. 19 - Determine the y parameters at = 1,000 rad/s for...Ch. 19 - What is the y parameter presentation of the...Ch. 19 - In the two-port of Fig. 19.113, let y12 = y21 = 0,...Ch. 19 - If three copies of the circuit in Fig. 19.114 are...Ch. 19 - Obtain the h parameters for the network in Fig....Ch. 19 - The circuit in Fig. 19.116 may be regarded as two...Ch. 19 - For the parallel-series connection of the two...Ch. 19 - Determine the z parameters for the network in Fig....Ch. 19 - A series-parallel connection of two two-ports is...Ch. 19 - Three copies of the circuit shown in Fig. 19.70...Ch. 19 - Determine the ABCD parameters of the circuit in...Ch. 19 - For the individual two-ports shown in Fig. 19.121...Ch. 19 - Use PSpice or MultiSim to obtain the z parameters...Ch. 19 - Using PSpice or MultiSim, find the h parameters of...Ch. 19 - Obtain the h parameters at = 4 rad/s for the...Ch. 19 - Use PSpice or MultiSim to determine the z...Ch. 19 - Use PSpice or MultiSim to find the z parameters of...Ch. 19 - Repeat Prob. 19.26 using PSpice or MultiSim....Ch. 19 - Use PSpice or MultiSim to rework Prob. 19.31....Ch. 19 - Rework Prob. 19.47 using PSpice or MultiSim....Ch. 19 - Using PSpice or MultiSim, find the transmission...Ch. 19 - At =1rad/s, find the transmission parameters of...Ch. 19 - Obtain the g parameters for the network in Fig....Ch. 19 - For the circuit shown in Fig. 19.129, use PSpice...Ch. 19 - Using the y parameters, derive formulas for Zin,...Ch. 19 - A transistor has the following parameters in a...Ch. 19 - A transistor with hfe=120,hie=2khre=104,hoe=20S is...Ch. 19 - For the transistor network of Fig. 19.130,...Ch. 19 - Prob. 92PCh. 19 - Prob. 93PCh. 19 - A transistor in its common-emitter mode is...Ch. 19 - Prob. 95PCh. 19 - Prob. 96PCh. 19 - Synthesize the transfer function...Ch. 19 - A two-stage amplifier in Fig. 19.134 contains two...Ch. 19 - Assume that the two circuits in Fig. 19.135 are...
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- Choose the correct answer: 1- The stator core of a 3- phase induction motor is laminated in order to reduce the Eddy current loss ) Weight of the stator (B) Hysteresis loss (C) Both eddy current and hysteresis loss - In cumulatively cascade method for speed controlling of a 3-phase induction motor, if PA is the number of poles of main motor and P, is the number of poles of auxiliary motor. Then the speed of the motor B is given by Ⓐ120f/ PA + PB CO (B) 120f/PA-Ps (C) 120f/PA (D) 120f/ Ps 3-Direct online starter is used for 3- phase induction motors having capacity COOOO ⑭Ⓐ Less than 5 h.p. (B) Less than 10 h.p. (C) Greater than 10 h.p. (D) For any capacity motor 4-Crawling of a 3- phase induction motor is a phenomena mainly associated with (B) 5th harmonics Ⓒ) 7 th harmonics (D) 2nd harmonics (A) 3rd harmonics 5-Cogging in a 3- phase induction motor is caused --------- (Ⓐ) If the number of stator slots are equal to number of rotor slots (B) If the motor is running at fraction of its…arrow_forwardChoose the correct answer: 1-We avoid line starting of induction motor and use starter because... (A) It will run in reverse direction (B) It will pick up very high speed and may go out of step Motor takes five to seven times its full load current (D) Starting torque is very high 2-DOL starting of induction motors is usually restricted to........... A Low horsepower motors (D) High speed motors (B) Variable speed motors (C) High horsepower motors 3- The method which can be used for the speed control of induction motor from stator side is......... (A) V/f control (B) Controlling number of stator poles to control Ns (C) Adding rheostats in stator circuit All of these 4-In cumulatively cascade method for speed controlling, if PA is the number of poles of main motor and PB is the number of poles of auxiliary motor. Then the speed of the rotor B is given by 120f/PA + PB (B) 120f/PA-PB (C) 120f/PA 5-The crawling in the induction motor is caused by.............. (A) low voltage supply (B)…arrow_forwardFor the picture attached below the parameters are the following: f1 = 400 Hz m(t) = sin(2 fmt), where fm = 300 Hz. Assume ideal LPFs with a cut-o frequency of f1. What would be the value of frequency f2 be so that the carrier frequency is 2.5kHz? What modification of this system is required to generate USSB (at the same carrier frequency)? ( Note: this does not involbe changing the oscillator frequencies)arrow_forward
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Z Parameters - Impedance Parameters; Author: Electrical Engineering Authority;https://www.youtube.com/watch?v=qoD4AoNmySA;License: Standard Youtube License