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Inductance Fundamentals
A.
Bhatia
Overview
Inductance is
the property of an electric circuit component that opposes any change in
electric current. It is a measure of the amount of magnetic flux produced for a
given electric current and is designated by letter “L”. An inductor is a
component designed to produce a specific inductance i.e. having no resistance or
capacitance. An
inductor, when subjected to an increasing electrical current flow, generates a
back voltage that opposes this current. Inductance quantifies how much energy an
inductor can store and is expressed in henrys (h). An inductor consists of at
least one winding of wire, but it usually has more.
Examples of
inductors or devices having inductance are transformers, chokes, coils relays
and motors.
The relationship of
current, magnetism, and motion is important to the topic of inductance. This
3-hr course will discuss these aspects in detail and is based
entirely on Naval Education and Training
Materials (NAVEDTRA 14174),
Electricity and Electronic Training Series;
Module-2, Chapter 2
titled “Inductance”.
The
student must take a multiple-choice quiz consisting of fifteen (15) questions at the
end of this course to obtain PDH credits.
Specific Knowledge or Skill Attained
This course teaches the
following specific knowledge and skills:
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Define the term
"inductance”, "induced emf" and "counter emf."
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State Lenz's law
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List five factors that
affect the inductance of a coil and state how various physical changes in
these factors affect inductance
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State the principles and
sequences involved in the buildup and decay of current in an LR series circuit
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State the three types of
power loss in an inductor
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Define the term "mutual
inductance” and “coefficient of coupling”
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Given the inductance
values of and the coefficient of coupling between two series-connected
inductors, solve for mutual inductance, M.
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Write the formula for
the "total inductance" of two inductors connected in series-opposing
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Given the inductance
values of and the mutual inductance value between two coils connected in
series-aiding, solve for their combined inductance, LT
Course
Click on the following
PDF attachment and review the document prior to taking
a quiz for credit.
Inductance (321 KB)
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