Engineering Electromagnetics
9th Edition
ISBN: 9780078028151
Author: Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher: Mcgraw-hill Education,
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Question
Chapter 13, Problem 13.31P
To determine
If the mode field radius is greater than or less than the fiber core radius in single-mode step-index fiber.
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11:04 PM P
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"168 76
EEE 316-Electr...chines | PQ..pdf
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4th September, 2023.
INSTRUCTIONS:
Answer FIVE (5) QUESTIONS,
DURATION: 3 HOURS
QUESTION ONE:
1a)
What is electromechanical energy conversion.
(3 Mark:
1b)
Explain the following terms: permanent magnets and non-permanent magnets
(5 Mark:
1c)
A short shunt generator delivers 45A at 240V and the resistance of the shunt field and armature:
500 and 0.030 respectively. Calculated the generated emf.
(6 Marks
QUESTION TWO:
2a)
2b)
Energy can never be created or destroyed", discuss with examples
Why is the air-gap very important in electromechanical systems.
(4 Marks
(4 Marks,
2c)
A short shunt generator delivers 450A at 240V and the resistance of the shunt field and armature
are 500 and 0.030 respectively. Calculated the generated emf.
(6Marks)
QUESTION THREE:
3a)
3b)
List and explain the two types of armature windings mostly used in DC machines.
Differentiate between electromechanical devices and machines with examples.…
2.
For the circuit shown, V = -10 V, R. = 10 kQ, R
Calculate the operating point for the circuit shown. Use /,
= 2.2 kQ, R = 3.6 kQ, R = 1 kQ.
//ẞ and calculate /. for ẞ = 90.
R1
m
R2
22
Rc
C
Vec
RE
HE
Pls show neat and whole solution
Chapter 13 Solutions
Engineering Electromagnetics
Ch. 13 - The conductors of a coaxial transmission line are...Ch. 13 - Prob. 13.2PCh. 13 - Prob. 13.3PCh. 13 - Find R, L, C, and G for a two-wire transmission...Ch. 13 - Prob. 13.5PCh. 13 - Consider an air-filled coaxial transmission line...Ch. 13 - Pertinent dimensions for the transmission line...Ch. 13 - A transmission line constructed from perfect...Ch. 13 - Prob. 13.9PCh. 13 - Two microstrip lines are fabricated end-to-end on...
Ch. 13 - Prob. 13.11PCh. 13 - Prob. 13.12PCh. 13 - Prob. 13.13PCh. 13 - Prob. 13.14PCh. 13 - For the guide of Problem 13.14, and at the 32 GHz...Ch. 13 - Prob. 13.16PCh. 13 - A parallel-plate guide is partially filled with...Ch. 13 - Prob. 13.18PCh. 13 - Prob. 13.19PCh. 13 - Two rectangular waveguides are joined end-to-end....Ch. 13 - Prob. 13.21PCh. 13 - Consider the TE11 mode in a rectangular guide...Ch. 13 - Prob. 13.23PCh. 13 - Prob. 13.24PCh. 13 - Prob. 13.25PCh. 13 - Prob. 13.26PCh. 13 - Prob. 13.27PCh. 13 - Prob. 13.28PCh. 13 - An asymmetric slab waveguide is shown in Figure...Ch. 13 - A step index optical fiber is known to be single...Ch. 13 - Prob. 13.31PCh. 13 - Prob. 13.32P
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- Pls show neat and whole solutionarrow_forwardA. A dc chopper with a free-wheeling diode feeds a dc motor with an armature inductance of 15 mH and resistance of 12. The dc source voltage is 200 V. The ON time and OFF time are 2 ms and 0.5 ms respectively. Determine the armature current when the back Emf of the motor is 155 V. Also draw the power circuitry.arrow_forwardAn inductive load is controlled by an impulse commutation chopper in Fig.1 and peak load current IL-450A at a supply voltage of 220V. The chopping frequency f=275 Hz, commutation capacitor C=60μF and reversing inductance Lm=20μH.The source inductance Ls 8μH, determine: td tc tr=tc+td a) peak Capacitor discharge Current. b) Circuit turn off time. c) Commutation time. d) The maximum instantaneous capacitor voltage. Vects = Vs+ IL LS sin ust Ls 000002 a C T₁ IL T₂ FWD ic oooooL L D₁ fig1 LOAD Vo Iarrow_forward
- An inductive load is controlled by an impulse commutation chopper in Fig.1 and peak load current IL-450A at a supply voltage of 220V. The chopping frequency f=275 Hz, commutation capacitor C=60μF and reversing inductance Lm=20μH.The source inductance Ls=8μH, determine : td tc tr=tc+td a) peak Capacitor discharge Current. b) Circuit turn off time. c) Commutation time. d) The maximum instantaneous capacitor voltage. Vects = Vs+ ILLS Ls 000002 a C ic T₁ iTI IL T₂ FWD LOAD Vo oooooL L D₁ fig1 Iarrow_forwardA. A dc chopper with a free-wheeling diode feeds a dc motor with an armature inductance of 15 mH and resistance of 10. The dc source voltage is 200 V. The ON time and OFF time are 2 ms and 0.5 ms respectively. Determine the armature current when the back Emf of the motor is 155 V. Also draw the power circuitry. 100arrow_forward1. For the circuit shown, VBB = +10 V, Vcc = +30 V, RB = 470 kQ, Rc = 6 kQ. Calculate the operating point for the circuit shown for a ẞ value of 90 and for a ẞ value of 130. VBB RB w Rc Vccarrow_forward
- The circuit in the figure below has been left for a long time. Determine the current i.arrow_forwardDraw and explain the electronic circuit diagram of ON/OFF controller. Write its advantagesand disadvantages.arrow_forwardThe expected value of the vyoltage across a resistor is 545 V However, measurement yields avalue o 500 V. Calculate: a) Absolute error b) Percentage error c) Absolute accuracy d) Relative accuracy.arrow_forward
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