Note Answer all questions Q1./ Choose the correct answer. 1- The carbon fibers are common in use to build structures because *** a) easily in mass production b) it's black color c) light weight and density d) high strength-to-weight ratio 2- The need of turbocharging system is to a) heat up combustion chamber c) speed up the intake air b) increase intake pressure d) increase oxygen molecules

Note Answer all questions Q1./ Choose the correct answer. 1- The carbon fibers are common in use to build structures because *** a) easily in mass production b) it's black color c) light weight and density d) high strength-to-weight ratio 2- The need of turbocharging system is to a) heat up combustion chamber c) speed up the intake air b) increase intake pressure d) increase oxygen molecules

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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A linear machine has the following parameters: The battery voltage, V = 120 V, The internal resistance of the battery R = 0.4 02, The length of the bar is1 meter, and the magnetic flux density B = 0.5 T (out of the page). What is the no load steady-state speed of the bar at starting? 1=0 R www O a. Speed VSS = 240 m/s to the right O b. Speed Vs = 240 m/s to the left O c. Speed Vss = 48 m/s to the right O d. None e. Speed Vss = 48 m/s to the left B 1
Q4: i) Which of the following is true for an induction cooker and a resistance cooker? Induction cooker will have greater percentage loss Resistance cooker will have greater percentage loss Induction cooker will have lower efficiency Both cookers will have equal percentage losses ii) Which of the following is true for induction cooker? The vessel used should be of non-magnetic material The vessel used should be of plastic material The vessel used should be of insulating material The vessel used should be of magnetic material iii) An induction cooker used for efficiency test is rated for 1 kW , 200V, 50 Hz, and is designed to work at unity power factor. Suitable wattmeter to measure its input power will be ______ (150 V/ 5 A) (300 V/10 A) (150 V/ 10 A) (250 V/ 10 A)
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A ring core made of two different materials are as two sections. Given L1= 6cm, L2= 10cm, A1= 5 cm2 , A2= 8cm2 and total reluctance is 70000 AT/Wb . If relative permeability of second section is 10000 , then relative permeability of section 1 is: し」レ2 A2 Select one: O a. 1600 Ob. 10000 Orci160000 d. None of these
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Answer all questions from this section. Use a fresh page for each question. Question B1 [15 pts] An universal motor is very similar to a DC series motor in construction, but it is modified slightly to allow the motor to operate properly on AC power. A washing machine is driven by an universal motor, which is powered by single-phase AC source having 110 Vac and 60 Hz. The armature winding of the motor has the resistance and inductance of 0.4 Q2 and 3 mH, respectively. The field winding of the motor has the resistance and inductance of 0.8 02 and 6 mH, respectively. When the washing machine operates at half load torque, the motor draws 10 Aac and runs at 1000 rpm. Calculate the input current and speed of the motor when the washing machine operates at full load torque. At half load torque, (i) Calculate impedance of the armature and field windings. [3 pts] (ii) Calculate the average electromotive force (emf) and average current in the armature. [4 pts] At full load torque. (iii) Determine…
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Which is the answer for Question 13
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1. Consider the DC linear machine system shown in the figure below. In that sense, answer ask. t = 0 R В X X XX ХXXX Vi ХXXXX хх X X ХXXX ХXXX (a) Describe the phenomena that occur when the switch is closed at time t = 0. (b) What are the conditions for a DC machine to operate as a motor? (c) What are the conditions for a DC machine to operate as a generator? (d) If Vi =250 V, R =0.10 Q, I =0.5 m, and B =0.5 T. Determine the inrush current and steady-state current of the dc machine.