US ARMY Military Basics Electronics Course.pdf

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Fundamentals of Electricity Course
BASIC ELECTRICITY
PART I
*SUBCOURSE MM0703
US Army Ordnance, Missile and Munitions Center and School
*This subcourse supersedes lessons 2, 3, 4, and 5 of Basic Electricity, MM0704.
MM 0703
This publication is provided for nonresident instruction
only.
It reflects the current thought of this school and
conforms to published Department of the Army doctrine as
closely as possible.
Users of this publication are encouraged to recommend changes
and submit comments for its improvement. Comments should be
keyed to the specific page and line of the text to which the
change is recommended.
Reasons will be provided for each
comment to insure understanding and complete evaluation.
ii
MM 0703
CONTENTS
INTRODUCTION, vi
Supplementary Requirements, vi
Credit Hours, vi
Administrative Instructions, vi
Grading and Certification Instructions, vii
LESSON 1:
ELECTRON THEORY AND MAGNETISM (TASKS:
ANY MISSILE REPAIRER TASK), 1
Electron Theory, 1
Basic Concepts of Matter, 1
Molecules, 1
Atoms, 2
Ions and Ionization, 3
Static Electricity, 3
Conductors and Insulators, 8
Distribution of Charges on Objects, 8
Electrostatic Shielding, 9
Magnetism, 9
History and Definition, 10
Forces Between Poles, 10
Magnetic Fields, 12
Terrestrial Magnetism, 14
Theory of Permanent Magnets, 15
Electromagnetism, 16
REVIEW EXERCISES, 22
LESSON 2:
CIRCUITS (TASKS:
ANY MISSILE REPAIRER TASK), 27
An Electric Circuit, 27
Terminology, 27
Kinds of Circuits, 28
Electrical Measurements, 28
Coulomb, 28
Ampere, 29
Ohm, 29
Volt, 29
Watt, 29
Practical Values of Electrical Terms, 29
iii
MM 0703
Electromotive Force, 29
Current, 30
Resistance, 30
Fixed, 30
Adjustable, 31
Variable, 31
Laws, 32
Ohm's Law, 32
Kirchoff's Laws, 34
Power, 38
Special-Case Problem Solving, 39
REVIEW EXERCISES, 44
LESSON 3:
49
DIRECT AND ALTERNATING CURRENTS (TASKS:
ANY MISSILE REPAIRER TASK),
Definition, 49
Direct Current, 49
Alternating Current, 49
History, 50
Generation of Current and Voltage by an AC System, 60
Principles, 50
Generation of AC Voltage, 52
Graphic Representation of AC, 55
Frequency of AC Voltage and Current Waves, 59
Angular Motion, 60
Amplitude, 61
Determining Amplitude, 61
Effective AC Voltage, 62
Phase, 63
Combining AC Voltage, 66
REVIEW EXERCISES, 68
iv

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