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 7, Problem 7.15P
To determine
(a)
The value of H in spherical coordinates for the region inside the sphere.
To determine
(b)
The value of H in spherical coordinates for the region outside the sphere.
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Students have asked these similar questions
A. 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.
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+ IL LS sin ust
Ls
000002
a
C
T₁
IL
T₂
FWD
ic
oooooL
L
D₁
fig1
LOAD
Vo
I
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
I
Chapter 7 Solutions
Engineering Electromagnetics
Ch. 7 - Find H in rectangular components at P(2,3,4) if...Ch. 7 - Prob. 7.2PCh. 7 - Prob. 7.3PCh. 7 - Prob. 7.4PCh. 7 - The parallel filamentary conductors shown in...Ch. 7 - A disk of radius a lies in the xy plane, with z...Ch. 7 - Prob. 7.7PCh. 7 - For the finite-length current element on the z...Ch. 7 - Prob. 7.9PCh. 7 - Prob. 7.10P
Ch. 7 - A solenoid of radius a and of length. L is...Ch. 7 - Prob. 7.12PCh. 7 - Prob. 7.13PCh. 7 - Prob. 7.14PCh. 7 - Prob. 7.15PCh. 7 - A current filament carrying I in the -az direction...Ch. 7 - Prob. 7.17PCh. 7 - Prob. 7.18PCh. 7 - Prob. 7.19PCh. 7 - A solid conductor of circular cross section with a...Ch. 7 - Prob. 7.21PCh. 7 - Prob. 7.22PCh. 7 - Prob. 7.23PCh. 7 - Prob. 7.24PCh. 7 - Prob. 7.25PCh. 7 - Prob. 7.26PCh. 7 - The magnetic field intensity is given in a certain...Ch. 7 - Given H=(3r2/sin)a+54rcosa A/m in free space: (a)...Ch. 7 - Prob. 7.29PCh. 7 - Prob. 7.30PCh. 7 - Prob. 7.31PCh. 7 - Prob. 7.32PCh. 7 - Use an expansion in rectangular coordinates to...Ch. 7 - A filamentary conductor on the z axis carries a...Ch. 7 - A current sheet K = 20 az A/m, is located at p =...Ch. 7 - Let A= (3y-z)ax+2xzayWb/m in a certain regin of...Ch. 7 - Let/N=1000, I=.08 A, p0=2 cm and a=.08 cm for the...Ch. 7 - A square filamentary differential current loop, dL...Ch. 7 - Prob. 7.39PCh. 7 - Show that the line integral of the vector...Ch. 7 - Prob. 7.41PCh. 7 - Show that 2(1/R12)=1(1/R12)=R21/R312.Ch. 7 - Compute the vector magnetic potential within the...Ch. 7 - Prob. 7.44P
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