Engineering Electromagnetics
9th Edition
ISBN: 9780078028151
Author: Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher: Mcgraw-hill Education,
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Textbook Question
Chapter 8, Problem 8.31P
A toroid is constructed of a magnetic material having a cross-sectional area of 2.5 cm2 and an effective length of 8 cm. There is also a short air gap of 0.25 mm length and an effective area of 2.8 cm2. Ammo of 200 A. t is applied to the magnetic circuit. Calculate the total flux in thetoroid if the magnetic material: (a) is assumed to have infinite permeability; (b) is assumed to be linear with đ�œ‡r = 1000; (c) is silicon steel.
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6) a) Current is generally defined with respect to ...b) Current in a wire is defined with respect to ...c) Derive how much current flows through a closed surface in the magnetostatic case.
d) Derive magnetic flux through a closed surface for a non-magnetostatic case.
Q4// A ring of a mean diameter 30 cm
and cross sectional area of 15 cm2 is
made up of semi – circular sections of
cast iron and cast steel. If each joint
has an air gap of 0.25 mm. Find amper
turns required to produce a flux of 7 x
10 weber in the magnetic circuit. The
relative permeability of steel and iron
are 852 and 165 respectively.
-
OA- Amper turns required= 1105
OB- Amper turns required= 1995
OC- Amper turns required= 2250
OD- Amper turns required= 3150
OE- None of above
ارسال الاجابة
The magnetic structure shown in the figure is built with a material whose magnetization curve is expressed by: (See image with the equation)
The length of the mean magnetic path in the core is equal to 0.75 m. The measurements of the cross section are 6 × 8 cm 2. The length of the air gap is 2 mm and the flux in it is equal to 4 mWb (in the direction indicated in the Figure). Determine the number of turns in coil B.
Ans: NB =1,237 turns (I need the procedure)
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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