Electric Circuits. (11th Edition)
11th Edition
ISBN: 9780134746968
Author: James W. Nilsson, Susan Riedel
Publisher: PEARSON
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Question
Chapter 7, Problem 58P
a)
To determine
Design an first-order
b)
To determine
Find the expression for voltage drop across the capacitor for
c)
To determine
Calculate the time taken for a capacitor to reach a voltage drop to 50 V.
Expert Solution & Answer
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Students have asked these similar questions
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
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…
Chapter 7 Solutions
Electric Circuits. (11th Edition)
Ch. 7.1 - The switch in the circuit shown has been closed...Ch. 7.1 - Prob. 2APCh. 7.2 - Prob. 3APCh. 7.2 - Prob. 4APCh. 7.3 - Prob. 5APCh. 7.3 - Prob. 6APCh. 7.4 - Prob. 7APCh. 7.4 - Prob. 8APCh. 7.5 - Prob. 9APCh. 7.5 - Prob. 10AP
Ch. 7.7 - There is no energy stored in the capacitor at the...Ch. 7.7 - Prob. 12APCh. 7 - Prob. 1PCh. 7 - In the circuit shown in Fig. P 7.2, the switch...Ch. 7 - Prob. 3PCh. 7 - The switch shown in Fig. P 7.4 has been open for a...Ch. 7 - Prob. 5PCh. 7 - For the circuit of Fig. P 7.5, what percentage of...Ch. 7 - Prob. 7PCh. 7 - In the circuit in Fig. P 7.8, the voltage and...Ch. 7 - Prob. 9PCh. 7 - Prob. 10PCh. 7 -
The switch in the circuit seen in Fig. P 7.11 has...Ch. 7 - In the circuit in Fig. P 7.11, let Ig represent...Ch. 7 - The two switches in the circuit seen in Fig. P...Ch. 7 - Prob. 14PCh. 7 - Prob. 15PCh. 7 - Prob. 16PCh. 7 - Prob. 17PCh. 7 - Prob. 18PCh. 7 - Prob. 19PCh. 7 - For the circuit seen in Fig. P 7.19, find
the...Ch. 7 - Prob. 21PCh. 7 - Prob. 22PCh. 7 - Prob. 23PCh. 7 - Prob. 24PCh. 7 - The switch in the circuit in Fig. P 7.25 is closed...Ch. 7 - In the circuit shown in Fig. P 7.26, both switches...Ch. 7 -
In the circuit in Fig. P 7.27 the voltage and...Ch. 7 - Prob. 28PCh. 7 - Prob. 29PCh. 7 - The switch in the circuit seen in Fig. P 7.30 has...Ch. 7 - In Problem 7.30 how many microjoules of energy are...Ch. 7 - Prob. 33PCh. 7 - Prob. 34PCh. 7 - Prob. 35PCh. 7 - Prob. 36PCh. 7 - Prob. 37PCh. 7 - The switch in the circuit shown in Fig. P 7.38 has...Ch. 7 - Prob. 39PCh. 7 - Prob. 40PCh. 7 - Prob. 41PCh. 7 - Prob. 42PCh. 7 - Prob. 43PCh. 7 - Prob. 44PCh. 7 - Prob. 45PCh. 7 - Prob. 46PCh. 7 - For the circuit in Fig. P 7.4, find (in...Ch. 7 - Prob. 48PCh. 7 - Prob. 49PCh. 7 - Prob. 50PCh. 7 - Prob. 51PCh. 7 - Prob. 52PCh. 7 - Prob. 53PCh. 7 - Prob. 54PCh. 7 - The switch in the circuit of Fig. P 7.55 has been...Ch. 7 - The switch in the circuit seen in Fig. P 7.56 has...Ch. 7 - Prob. 57PCh. 7 - Prob. 58PCh. 7 - Prob. 59PCh. 7 - The switch in the circuit shown in Fig. P 7.61 has...Ch. 7 - Prob. 62PCh. 7 - Prob. 63PCh. 7 - Prob. 64PCh. 7 - Prob. 65PCh. 7 - Prob. 66PCh. 7 - Prob. 67PCh. 7 - Prob. 68PCh. 7 - Prob. 69PCh. 7 - Prob. 70PCh. 7 - Prob. 71PCh. 7 - Prob. 72PCh. 7 - Prob. 73PCh. 7 - For the circuit in Fig. P 7.73, how many...Ch. 7 - Prob. 75PCh. 7 - Prob. 76PCh. 7 - Prob. 77PCh. 7 - Prob. 78PCh. 7 - Prob. 79PCh. 7 - Prob. 80PCh. 7 - Prob. 81PCh. 7 - Prob. 82PCh. 7 - Prob. 84PCh. 7 - Prob. 85PCh. 7 - Prob. 86PCh. 7 - Prob. 87PCh. 7 - Prob. 88PCh. 7 - Prob. 90PCh. 7 - Prob. 91PCh. 7 - Prob. 92PCh. 7 - Prob. 93PCh. 7 - Prob. 94PCh. 7 - Prob. 95PCh. 7 - Prob. 100PCh. 7 - Prob. 101PCh. 7 - Prob. 102PCh. 7 - Prob. 103PCh. 7 - Prob. 104PCh. 7 - Prob. 105PCh. 7 - Prob. 106PCh. 7 - Prob. 107P
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Similar questions
- Choose 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_forwardDetermine (analytically) the signals at points A-Garrow_forward
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