Simplify the equations, where do they come from?

Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Simplify the
equations, where
do they come
from?
di
R
H (into the page)
Fig. (7.5) Field at point P due to a straight filamentary conductor.
Letting z = p cot a; dz = -p cosec?a da, and equation (7.11) becomes
az
az
p? cosec?a da
Ipdz
H =
47|p² + z?]3/2a = --
sin a da
p3 cosec a
a = --a
4πρ
or
Transcribed Image Text:Simplify the equations, where do they come from? di R H (into the page) Fig. (7.5) Field at point P due to a straight filamentary conductor. Letting z = p cot a; dz = -p cosec?a da, and equation (7.11) becomes az az p? cosec?a da Ipdz H = 47|p² + z?]3/2a = -- sin a da p3 cosec a a = --a 4πρ or
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