IEC 60050-121:1998/AMD4:2021
(Amendment)Amendment 4 - International Electrotechnical Vocabulary (IEV) - Part 121: Electromagnetism
Amendment 4 - International Electrotechnical Vocabulary (IEV) - Part 121: Electromagnetism
Amendement 4 - Vocabulaire Electrotechnique International (IEV) - Partie 121: Electromagnétisme
General Information
- Status
- Published
- Publication Date
- 18-Jan-2021
- Technical Committee
- TC 1 - Terminology
- Drafting Committee
- MT 100 - TC 1/MT 100
- Current Stage
- PPUB - Publication issued
- Start Date
- 18-May-2020
- Completion Date
- 19-Jan-2021
Relations
- Amends
IEC 60050-121:1998 - International Electrotechnical Vocabulary (IEV) - Part 121: Electromagnetism - Effective Date
- 05-Sep-2023
Overview
IEC 60050-121:1998/AMD4:2021 is the fourth amendment to the International Electrotechnical Vocabulary (IEV) - Part 121, which focuses on Electromagnetism. Published by the International Electrotechnical Commission (IEC), this amendment updates terminologies and definitions relating to electromagnetic concepts, ensuring alignment with current technical standards and scientific understanding.
The IEV serves as a crucial reference vocabulary for professionals in the electrotechnical sector, providing standardized terms for electrical, electronic, and related technologies worldwide. This amendment incorporates approved changes by IEC Technical Committee 1, which specializes in terminology, ensuring precision and clarity in electromagnetic terminology.
Key Topics
This amendment enhances the precision of foundational terms in electromagnetism, including but not limited to:
Electric Charge
Updated standard definitions distinguish electric charge clearly from deprecated terms like "quantity of electricity," referring users to related fundamental concepts.Electric Constant (Permittivity of Vacuum)
Defined as a scalar constant linking electric and mechanical quantities, based on Coulomb’s law in a vacuum. The amendment clarifies its mathematical relationships and connections with magnetic constants and the speed of light.Magnetic Constant (Permeability of Vacuum)
A scalar constant linking electromagnetic and mechanical quantities, explained via the force between current-carrying conductors in a vacuum. The relationship between magnetic and electric constants is emphasized for electromagnetic calculations.Electromagnetic Field
Described as comprising four interrelated vector quantities-electric field strength (E), electric flux density (D), magnetic field strength (H), and magnetic flux density (B)-which characterize the electric and magnetic state of a medium or vacuum, adhering to Maxwell’s equations.Maxwell’s Equations
Presented as the fundamental four equations connecting the electromagnetic field vectors with electric current density and charge. These form the essential basis of electromagnetism theory and practical applications.Electromagnetic Wave
Defined as time-varying fluctuations of an electromagnetic field propagating at velocity determined by the medium’s properties, often resulting from variations in electric charges or currents.Permittivity and Permeability (Absolute and Relative)
Clarification of the scalar or tensor nature of these quantities depending on isotropic or anisotropic media; deprecates older terms like "dielectric constant." The amendment stresses the importance of correct usage for consistency in engineering practices.
Applications
This standard amendment plays a pivotal role in enabling consistent communication and understanding in various fields, such as:
Electrical and Electronic Engineering
Precise terminology facilitates design, analysis, and manufacturing of electromagnetic devices and systems.Electromagnetic Research and Development
Provides unified vocabulary used in academic, industrial, and research settings worldwide, aiding clarity in publications, patents, and cross-disciplinary projects.Standards Development and Compliance
Supports regulatory bodies and industry standards organizations in referencing harmonized terms crucial for product conformity and safety.Education and Training
Supplies educators and students with accurate terms essential to mastering concepts in physics, electrical engineering, and applied sciences.Electromagnetic Compatibility (EMC) and Testing
Consistent definitions improve the formulation of test methods and interpretation of electromagnetic field measurements.
Related Standards
IEC 60050-121 amendment aligns with and complements other key IEC publications, such as:
- IEC 60050 (International Electrotechnical Vocabulary) Series - Comprehensive vocabulary covering all electrotechnical fields.
- IEC 113 (Basic Electrotechnical Quantities) - Provides core quantity definitions referred to in electromagnetic terminology.
- Standards covering electromagnetic compatibility (EMC) - Utilize consistent vocabulary for defining electromagnetic interference and immunity.
- IEC Technical Committee 1 outputs on terminologies - Continuously update electrotechnical vocabulary reflecting technological advances.
Practical Value
- Ensures clear and unambiguous communication between engineers, scientists, manufacturers, and regulators globally.
- Helps avoid terminological confusion especially where multiple synonyms or deprecated terms existed.
- Supports accurate interpretation of physical laws and relations involving electromagnetic constants and fields.
- Enhances the quality and interoperability of electrotechnical products and systems.
- Facilitates the use of the Electropedia, IEC's online interactive dictionary, providing easy access to updated definitions.
By adhering to IEC 60050-121:1998/AMD4:2021, industry professionals uphold internationally recognized terminology that reflects the latest scientific consensus in electromagnetism, promoting innovation and safety in electrical and electronic technologies.
Frequently Asked Questions
IEC 60050-121:1998/AMD4:2021 is a standard published by the International Electrotechnical Commission (IEC). Its full title is "Amendment 4 - International Electrotechnical Vocabulary (IEV) - Part 121: Electromagnetism". This standard covers: Amendment 4 - International Electrotechnical Vocabulary (IEV) - Part 121: Electromagnetism
Amendment 4 - International Electrotechnical Vocabulary (IEV) - Part 121: Electromagnetism
IEC 60050-121:1998/AMD4:2021 is classified under the following ICS (International Classification for Standards) categories: 01.040.17 - Metrology and measurement. Physical phenomena (Vocabularies); 17.220.01 - Electricity. Magnetism. General aspects; 29.020 - Electrical engineering in general. The ICS classification helps identify the subject area and facilitates finding related standards.
IEC 60050-121:1998/AMD4:2021 has the following relationships with other standards: It is inter standard links to IEC 60050-121:1998. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
IEC 60050-121:1998/AMD4:2021 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
IEC 60050-121 ®
Edition 2.0 2021-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
HO RIZONTAL PUBLICATION
PU BLICATION HORIZONTALE
AMENDMENT 4
AMENDEMENT 4
International Electrotechnical Vocabulary (IEV) –
Part 121: Electromagnetism
Vocabulaire Electrotechnique International (IEV) –
Partie 121: Electromagnétisme
IEC 60050-121:1998-08/AMD4:2021-01(en-fr)
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IEC 60050-121 ®
Edition 2.0 2021-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
H ORIZONTAL PUBLICATION
P UBLICATION HORIZONTALE
AMENDMENT 4
AMENDEMENT 4
International Electrotechnical Vocabulary (IEV) –
Part 121: Electromagnetism
Vocabulaire Electrotechnique International (IEV) –
Partie 121: Electromagnétisme
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 01.040.17; 17.220.01; 29.020 ISBN 978-2-8322-8182-6
– II – IEC 60050-121:1998/AMD4:2021
© IEC 2021
FOREWORD
This amendment specifies changes made to the International Electrotechnical Vocabulary
(www.electropedia.org) which have not been published as a separate standard.
The text of this amendment is based on the following change requests approved by IEC
technical committee 1: Terminology.
Change request Approved
C00052 2019-10-11
C00053 2019-12-13
C00054 2020-01-03
Full information on the voting for the approval of the change requests constituting this
amendment can be found on the IEV maintenance portal.
_____________
AVANT-PROPOS
Le présent amendement spécifie les modifications apportées au Vocabulaire Electrotechnique
International (www.electropedia.org) qui n'ont pas été publiées dans des normes
individuelles.
Le texte de cet amendement est issu des demandes de modification suivantes approuvées
par le comité d'études 1 de l’IEC: Terminologie.
Demande de Approuvée
modification
C00052 2019-10-11
C00053 2019-12-13
C00054 2020-01-03
Toute information sur le vote ayant abouti à l'approbation des demandes de modification
constituant cet amendement est disponible sur le portail “IEV maintenance”.
_____________
© IEC 2021
Part 121 / Partie 121
Replace IEV 121-11-01, IEV 121-11-03, IEV 121-11-05, IEV 121-11-10, IEV 121-11-14,
IEV 121-11-61, IEV 121-11-62, IEV 121-11-63, IEV 121-12-12, IEV 121-12-13, IEV 121-12-28,
IEV 121-12-29, IEV 121-12-30, IEV 121-12-31, IEV 121-13-04, IEV 121-13-05, IEV 121-13-06,
IEV 121-13-07, IEV 121-13-08 and IEV 121-13-09 by the following:
Remplacer IEV 121-11-01, IEV 121-11-03, IEV 121-11-05, IEV 121-11-10, IEV 121-11-14,
IEV 121-11-61, IEV 121-11-62, IEV 121-11-63, IEV 121-12-12, IEV 121-12-13, IEV 121-12-28,
IEV 121-12-29, IEV 121-12-30, IEV 121-12-31, IEV 121-13-04, IEV 121-13-05, IEV 121-13-06,
IEV 121-13-07, IEV 121-13-08 et IEV 121-13-09 par ce qui suit:
121-11-01
Q
q
electric charge
DEPRECATED: quantity of electricity
See IEV 113-02-10
charge électrique, f
DÉCONSEILLÉ: quantité d’électricité, f
Voir IEV 113-02-10
121-11-03
ε
electric constant
permittivity of vacuum
scalar constant linking the electric quantities and the mechanical quantities, obtained from the relation
based on Coulomb's law in a vacuum, where F is the magnitude of the force between two particles
with electric charges Q and Q respectively, placed at a distance r apart
1 2
Note 1 to entry: In a vacuum, the product of the electric constant ε and the electric field strength E is equal to the electric flux
density D:
D = ε E
Note 2 to entry: The electric constant ε is related to the magnetic constant μ and to the speed of light in vacuum c by the
0 0 0
relation εμ c = 1.
0 0 0
Note 3 to entry: The value of the electric constant ε is equal to
– 2 – IEC 60050-121:1998/AMD4:2021
© IEC 2021
constante électrique, f
permittivité du vide, f
DÉCONSEILLÉ: pouvoir inducteur spécifique du vide, m
constante scalaire reliant les grandeurs électriques et les grandeurs mécaniques, obtenue d'après la
relation
fondée sur la loi de Coulomb dans le vide, où F est la norme de la force s'exerçant entre deux
particules de charges électriques Q et Q respectivement, placées à une distance r l'une de l'autre
1 2
Note 1 à l'article: Dans le vide, le produit de la constante électrique ε par le champ électrique E est égal à l'induction électrique
D:
D = ε0E
Note 2 à l'article: La constante électrique ε est liée à la constante magnétique μ et à la vitesse de la lumière dans le vide c
0 0 0
par la relation εμ c = 1.
0 0 0
Note 3 à l'article: La valeur de la constante électrique est égale à
121-11-05
electrically charged, adj
See IEV 113-06-26
électriquement chargé, adj
chargé, adj
Voir IEV 113-06-26
121-11-10
free charge carrier
See IEV 113-06-27
porteur de charge libre, m
Voir IEV 113-06-27
121-11-14
μ
magnetic constant
permeability of vacuum
scalar constant linking the electromagnetic quantities and the mechanical quantities, obtained from the
relation
© IEC 2021
where F/l is the magnitude of the lineic force between two straight parallel conductors of infinite length
and negligible circular cross-section, placed at a distance d apart in vacuum and carrying electric
currents I and I
1 2
Note 1 to entry: In a vacuum, the product of the magnetic constant and the magnetic field strength H is equal to the magnetic
flux density B:
B = μ H
Note 2 to entry: The magnetic constant is related to the electric constant ε and to the speed of light in vacuum c by the
0 0
relation εμ c = 1.
0 0 0
−6 −2
Note 3 to entry: The value of the magnetic constant is equal to 1,256 637 062 12(19) × 10 N A .
constante magnétique, f
perméabilité du vide, f
constante scalaire reliant les grandeurs électromagnétiques et les grandeurs mécaniques, obtenue
d'après la relation
où F/l est la norme de la force linéique s'exerçant entre deux conducteurs parallèles, rectilignes, de
longueur infinie, de section circulaire négligeable, placés à une distance d l'un de l'autre dans le vide
et parcourus par des courants électriques I et I
1 2
Note 1 à l'article: Dans le vide, le produit de la constante magnétique par le champ magnétique H est égal à l'induction
magnétique B:
B = μ H
Note 2 à l'article: La constante magnétique est liée à la constante électrique ε et à la vitesse de la lumière dans le vide c par
0 0
la relation εμ c = 1.
0 0 0
−6 −2
Note 3 à l'article: La valeur de la constante magnétique est égale à 1,256 637 062 12(19) × 10 N A .
121-11-61
electromagnetic field
field, determined by a
...
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