Simplify theequations, wheredo they comefrom?diRH (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) becomesazazp? cosec?a daIpdzH =47|p² + z?]3/2a = --sin a dap3 cosec aa = --a4πρor

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Engineering

Electrical Engineering

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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Question

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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