Engineering Electromagnetics
9th Edition
ISBN: 9781260029963
Author: Hayt
Publisher: MCG
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Chapter 8, Problem 8.7P
A conducting strip of infinite length lies in the xy plane with its length oriented along the x axis, and where -b/2 < y < b/2 defines its width along y. Current I1 flows down the strip in the positive x direction and is uniformly distributed over the width. Above the strip and parallel to it at z = d is an infinitely long current filament that carries current I2 in the positive x direction. Find the force of attraction between the two currents per unit length in x Assume d << b.
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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
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a
C
T₁
IL
T₂
FWD
ic
oooooL
L
D₁
fig1
LOAD
Vo
I
Chapter 8 Solutions
Engineering Electromagnetics
Ch. 8 - A point charge, Q = - 0.3 /C and m = 3 Ă— -10-16...Ch. 8 - Prob. 8.2PCh. 8 - Prob. 8.3PCh. 8 - Show that a charged particle in a uniform magnetic...Ch. 8 - Prob. 8.5PCh. 8 - Show that the differential work in moving a...Ch. 8 - A conducting strip of infinite length lies in the...Ch. 8 - Two conducting strips, having infinite length in...Ch. 8 - A current of-100az A/m flows on the conducting...Ch. 8 - A planar transmission line consists of two...
Ch. 8 - Prob. 8.11PCh. 8 - Two circular wire rings are parallel to each...Ch. 8 - An infinitely long current filament is oriented...Ch. 8 - A solenoid is 25 era long, 3 cm in diameter, and...Ch. 8 - Prob. 8.15PCh. 8 - Prob. 8.16PCh. 8 - Prob. 8.17PCh. 8 - Prob. 8.18PCh. 8 - Given a material for which ℵK = 3.1 and within...Ch. 8 - Find H in a material where (a) fir = 4.2, there...Ch. 8 - Prob. 8.21PCh. 8 - Prob. 8.22PCh. 8 - Calculate values for HO,B0, and M0 at p = c for a...Ch. 8 - Two current sheets, K0,ay, A/m at z = 0 and -K0,ay...Ch. 8 - Prob. 8.25PCh. 8 - Prob. 8.26PCh. 8 - Let đ�œ‡rj = 2 in region 1, defined by 2x + 3y —...Ch. 8 - For values of B below the knee on the...Ch. 8 - Prob. 8.29PCh. 8 - Prob. 8.30PCh. 8 - A toroid is constructed of a magnetic material...Ch. 8 - Prob. 8.32PCh. 8 - Prob. 8.33PCh. 8 - Determine the energy stored per unit length in the...Ch. 8 - Prob. 8.35PCh. 8 - Prob. 8.36PCh. 8 - A Toroid has known, reluctance R. Two windings...Ch. 8 - Prob. 8.38PCh. 8 - Conducting planes in air at Z = 0 and z = d carry...Ch. 8 - Prob. 8.40PCh. 8 - Prob. 8.41PCh. 8 - Find the mutual inductance between two filaments...Ch. 8 - Prob. 8.43PCh. 8 - Prob. 8.44PCh. 8 - Beginning with the definition, of the scalar...
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