Magnetostatic Fields
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Figure 7.1 Magnetic field dH at P due to current element I dl.
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Figure 7.2 Determining the direction of dH using (a) the right-hand rule or (b) the righthanded-screw rule.
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Figure 7.3 Conventional representation of H (or I) (a) out of the page and (b) into the page.
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Figure 7.4 Current distributions: (a) line current, (b) surface current, (c) volume current.
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Figure 7.5 Field at point P due to a straight filamentary conductor.
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Figure 7.6 For Example 7.1: (a) conducting triangular loop, (b) side 1 of the loop.
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Figure 7.7 For Example 7.2: (a) current filament along semi-infinite x- and z-axes, aℓ and ar for H2 only; (b) determining ar for H2.
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Figure 7.8 For Example 7.3: (a) circular current loop, (b) flux lines due to the current loop.
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Figure 7.9 For Example 7.4; cross section of a solenoid.
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Figure 7.10 Ampère’s law applied to an infinite filamentary line current.
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Figure 7.11 Application of Ampère’s law to an infinite sheet: (a) closed path 1-2-3-4-1, (b) symmetrical pair of current filaments with current
along ay.
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Figure 7.12 Cross section of the transmission line; the positive z-direction is out of the page.
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Figure 7.13 Plot of Hf against r.
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Figure 7.14 For Example 7.5: parallel infinite current sheets.
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Figure 7.15 For Example 7.6: a toroid with a circular cross section.
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Figure 7.16 Magnetic flux lines due to a straight wire with current coming out of the page.
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Figure 7.17 Flux leaving a closed surface due to (a) isolated electric charge
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(b) magnetic charge,
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Figure 7.18 Successive division of a bar magnet results in pieces with north and south poles, showing that magnetic poles cannot be isolated.
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Figure 7.19 Illustration of the source point (x΄, y΄, z΄) and the field point (x, y, z).
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Figure 7.20 For Example 7.7.
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Figure 7.21 For Example 7.8: infinite current sheet.
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Figure 7.22 A cloud-to-ground lightning.
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Figure 7.23 For Review Question 7.2.
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Figure 7.24 For Review Question 7.3.
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Figure 7.25 For Review Question 7.6.
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Figure 7.26 For Review Question 7.10.
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Figure 7.27 For Problem 7.3.
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Figure 7.28 For Problem 7.6.
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Figure 7.29 For Problem 7.7.
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Figure 7.30 Current filament for Problem 7.10.
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Figure 7.31 Equilateral triangular loop for Problem 7.11.
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Figure 7.32 Rectangular loop of Problem 7.12.
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Figure 7.33 Filamentary loop of Problem 7.16; not drawn to scale.
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Figure 7.34 For Problem 7.21.
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Figure 7.35 Electric motor pole of Problem 7.29.
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Figure 7.36 Two-wire line of Problem 7.30.
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Figure 7.37 For Problem 7.31.
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Figure 7.38 Cross section of a brass ring enclosing a long straight wire; for Problem 7.34.
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