SI Units Flashcards: 7 Base Units & 22 Named Derived Units
Practice all 7 SI base units and 22 derived units with special names: quantities, symbols, and base-unit expressions in one installable deck.
دربارهٔ این دسته
Most SI lists are easy to scan and awkward to recall. These 110 text-only cards turn the complete core into small retrieval tasks: all seven base units and all 22 derived units with special names and symbols.
What the cards practice
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Quantity ↔ unit and symbol: recall each base quantity and every named derived quantity in both directions.
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Named unit ↔ coherent base-unit expression: expand all 22 special names, then reverse the mapping with the quantity supplied whenever an expression is shared.
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Notation and distinctions: keep case, spacing, symbol grammar, Hz/Bq, Gy/Sv, rad/sr, and kelvin/degree Celsius intervals straight.
The deck leaves out prefixes, conversions, non-SI units, unnamed derived units, significant figures, uncertainty, laboratory procedures, historical definitions, defining-constant values, and proprietary exam material. Expression-to-unit prompts always state the quantity, so shared expressions such as s⁻¹ and m²·s⁻² stay unambiguous.
The sequence establishes the seven base units first. It then alternates the 22 named units with a deterministic stride before moving from identity recall to base-unit expressions. Related directions and easy-to-confuse units stay at least three unrelated cards apart; the review scheduler handles longer-term spacing after installation.
Facts were checked against the BIPM SI Brochure, 9th edition, version 4.01 and NIST SP 330 §2, with notation checked against NIST SP 330 §5. The 2026 BIPM edition expresses radian and steradian as unit one; this deck follows that current form. No source prose, third-party deck text, or exam content was copied.
An AI tool helped draft and sequence the cards and generated the cover. Every final front and back was manually checked against the official SI tables. The original questions, answers, selection, sequence, metadata, and cover are shared under CC0 1.0 to the extent those elements can be dedicated; the underlying SI facts remain common knowledge.
کارتهای این دسته
کارت ۱
پرسش
What is the SI base unit for time?
پاسخ
second (s).
کارت ۲
پرسش
What is the SI base unit for length?
پاسخ
metre (m).
کارت ۳
پرسش
What is the SI base unit for mass?
پاسخ
kilogram (kg).
کارت ۴
پرسش
What is the SI base unit for electric current?
پاسخ
ampere (A).
کارت ۵
پرسش
What is the SI base unit for thermodynamic temperature?
پاسخ
kelvin (K).
کارت ۶
پرسش
What is the SI base unit for amount of substance?
پاسخ
mole (mol).
کارت ۷
پرسش
What is the SI base unit for luminous intensity?
پاسخ
candela (cd).
کارت ۸
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Which SI base quantity uses the second (s)?
پاسخ
Time.
کارت ۹
پرسش
Which SI base quantity uses the metre (m)?
پاسخ
Length.
کارت ۱۰
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Which SI base quantity uses the kilogram (kg)?
پاسخ
Mass.
کارت ۱۱
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Which SI base quantity uses the ampere (A)?
پاسخ
Electric current.
کارت ۱۲
پرسش
Which SI base quantity uses the kelvin (K)?
پاسخ
Thermodynamic temperature.
کارت ۱۳
پرسش
Which SI base quantity uses the mole (mol)?
پاسخ
Amount of substance.
کارت ۱۴
پرسش
Which SI base quantity uses the candela (cd)?
پاسخ
Luminous intensity.
کارت ۱۵
پرسش
Which SI unit with a special name is used for plane angle?
پاسخ
radian (rad).
کارت ۱۶
پرسش
Which SI unit with a special name is used for energy, work, or amount of heat?
پاسخ
joule (J).
کارت ۱۷
پرسش
Which SI unit with a special name is used for electric resistance?
پاسخ
ohm (Ω).
کارت ۱۸
پرسش
Which SI unit with a special name is used for Celsius temperature?
پاسخ
degree Celsius (°C).
کارت ۱۹
پرسش
Which SI unit with a special name is used for dose equivalent?
پاسخ
sievert (Sv).
کارت ۲۰
پرسش
Which SI unit with a special name is used for force?
پاسخ
newton (N).
کارت ۲۱
پرسش
Which SI unit with a special name is used for electric potential difference?
پاسخ
volt (V).
کارت ۲۲
پرسش
Which SI unit with a special name is used for magnetic flux density?
پاسخ
tesla (T).
کارت ۲۳
پرسش
Which SI unit with a special name is used for activity referred to a radionuclide?
پاسخ
becquerel (Bq).
کارت ۲۴
پرسش
Which SI unit with a special name is used for solid angle?
پاسخ
steradian (sr).
کارت ۲۵
پرسش
Which SI unit with a special name is used for power or radiant flux?
پاسخ
watt (W).
کارت ۲۶
پرسش
Which SI unit with a special name is used for electric conductance?
پاسخ
siemens (S).
کارت ۲۷
پرسش
Which SI unit with a special name is used for luminous flux?
پاسخ
lumen (lm).
کارت ۲۸
پرسش
Which SI unit with a special name is used for catalytic activity?
پاسخ
katal (kat).
کارت ۲۹
پرسش
Which SI unit with a special name is used for pressure or stress?
پاسخ
pascal (Pa).
کارت ۳۰
پرسش
Which SI unit with a special name is used for capacitance?
پاسخ
farad (F).
کارت ۳۱
پرسش
Which SI unit with a special name is used for inductance?
پاسخ
henry (H).
کارت ۳۲
پرسش
Which SI unit with a special name is used for absorbed dose or kerma?
پاسخ
gray (Gy).
کارت ۳۳
پرسش
Which SI unit with a special name is used for frequency?
پاسخ
hertz (Hz).
کارت ۳۴
پرسش
Which SI unit with a special name is used for electric charge?
پاسخ
coulomb (C).
کارت ۳۵
پرسش
Which SI unit with a special name is used for magnetic flux?
پاسخ
weber (Wb).
کارت ۳۶
پرسش
Which SI unit with a special name is used for illuminance?
پاسخ
lux (lx).
کارت ۳۷
پرسش
What quantity uses the radian (rad)?
پاسخ
Plane angle.
کارت ۳۸
پرسش
What quantity uses the joule (J)?
پاسخ
Energy, work, and amount of heat.
کارت ۳۹
پرسش
What quantity uses the ohm (Ω)?
پاسخ
Electric resistance.
کارت ۴۰
پرسش
What quantity uses the degree Celsius (°C)?
پاسخ
Celsius temperature.
کارت ۴۱
پرسش
What quantity uses the sievert (Sv)?
پاسخ
Dose equivalent.
کارت ۴۲
پرسش
What quantity uses the newton (N)?
پاسخ
Force.
کارت ۴۳
پرسش
What quantity uses the volt (V)?
پاسخ
Electric potential difference.
کارت ۴۴
پرسش
What quantity uses the tesla (T)?
پاسخ
Magnetic flux density.
کارت ۴۵
پرسش
What quantity uses the becquerel (Bq)?
پاسخ
Activity referred to a radionuclide.
کارت ۴۶
پرسش
What quantity uses the steradian (sr)?
پاسخ
Solid angle.
کارت ۴۷
پرسش
What quantity uses the watt (W)?
پاسخ
Power and radiant flux.
کارت ۴۸
پرسش
What quantity uses the siemens (S)?
پاسخ
Electric conductance.
کارت ۴۹
پرسش
What quantity uses the lumen (lm)?
پاسخ
Luminous flux.
کارت ۵۰
پرسش
What quantity uses the katal (kat)?
پاسخ
Catalytic activity.
کارت ۵۱
پرسش
What quantity uses the pascal (Pa)?
پاسخ
Pressure and stress.
کارت ۵۲
پرسش
What quantity uses the farad (F)?
پاسخ
Capacitance.
کارت ۵۳
پرسش
What quantity uses the henry (H)?
پاسخ
Inductance.
کارت ۵۴
پرسش
What quantity uses the gray (Gy)?
پاسخ
Absorbed dose and kerma.
کارت ۵۵
پرسش
What quantity uses the hertz (Hz)?
پاسخ
Frequency.
۱۱۰ کارت
SI Units Flashcards: 7 Base Units & 22 Named Derived Units
این دسته را رایگان مطالعه کنیدNibomo باز میشود تا بتوانید مطالعه را شروع کنید.
کارت ۵۶
پرسش
What quantity uses the coulomb (C)?
پاسخ
Electric charge.
کارت ۵۷
پرسش
What quantity uses the weber (Wb)?
پاسخ
Magnetic flux.
کارت ۵۸
پرسش
What quantity uses the lux (lx)?
پاسخ
Illuminance.
کارت ۵۹
پرسش
Express the radian (rad) in coherent SI base units.
پاسخ
1. The symbol rad keeps the plane-angle context explicit.
کارت ۶۰
پرسش
Express the joule (J) in coherent SI base units.
پاسخ
kg·m²·s⁻².
کارت ۶۱
پرسش
Express the ohm (Ω) in coherent SI base units.
پاسخ
kg·m²·s⁻³·A⁻².
کارت ۶۲
پرسش
Express the degree Celsius (°C) in coherent SI base units.
پاسخ
K. A degree Celsius and a kelvin have the same size; their zero points differ.
کارت ۶۳
پرسش
Express the sievert (Sv) in coherent SI base units.
پاسخ
m²·s⁻².
کارت ۶۴
پرسش
Express the newton (N) in coherent SI base units.
پاسخ
kg·m·s⁻².
کارت ۶۵
پرسش
Express the volt (V) in coherent SI base units.
پاسخ
kg·m²·s⁻³·A⁻¹.
کارت ۶۶
پرسش
Express the tesla (T) in coherent SI base units.
پاسخ
kg·s⁻²·A⁻¹.
کارت ۶۷
پرسش
Express the becquerel (Bq) in coherent SI base units.
پاسخ
s⁻¹. Use Bq for stochastic nuclear transformations, not periodic phenomena.
کارت ۶۸
پرسش
Express the steradian (sr) in coherent SI base units.
پاسخ
1. The symbol sr keeps the solid-angle context explicit.
کارت ۶۹
پرسش
Express the watt (W) in coherent SI base units.
پاسخ
kg·m²·s⁻³.
کارت ۷۰
پرسش
Express the siemens (S) in coherent SI base units.
پاسخ
kg⁻¹·m⁻²·s³·A².
کارت ۷۱
پرسش
Express the lumen (lm) in coherent SI base units.
پاسخ
cd·sr. Since sr has unit one, this is dimensionally cd; sr keeps the solid-angle context explicit.
کارت ۷۲
پرسش
Express the katal (kat) in coherent SI base units.
پاسخ
mol·s⁻¹.
کارت ۷۳
پرسش
Express the pascal (Pa) in coherent SI base units.
پاسخ
kg·m⁻¹·s⁻².
کارت ۷۴
پرسش
Express the farad (F) in coherent SI base units.
پاسخ
kg⁻¹·m⁻²·s⁴·A².
کارت ۷۵
پرسش
Express the henry (H) in coherent SI base units.
پاسخ
kg·m²·s⁻²·A⁻².
کارت ۷۶
پرسش
Express the gray (Gy) in coherent SI base units.
پاسخ
m²·s⁻².
کارت ۷۷
پرسش
Express the hertz (Hz) in coherent SI base units.
پاسخ
s⁻¹. Use Hz for periodic phenomena.
کارت ۷۸
پرسش
Express the coulomb (C) in coherent SI base units.
پاسخ
A·s.
کارت ۷۹
پرسش
Express the weber (Wb) in coherent SI base units.
پاسخ
kg·m²·s⁻²·A⁻¹.
کارت ۸۰
پرسش
Express the lux (lx) in coherent SI base units.
پاسخ
cd·sr·m⁻². Since sr has unit one, this is dimensionally cd·m⁻²; sr keeps the solid-angle context explicit.
کارت ۸۱
پرسش
For plane angle, which named SI unit has the coherent base-unit expression 1?
پاسخ
radian (rad).
کارت ۸۲
پرسش
For energy, work, or amount of heat, which named SI unit has the coherent base-unit expression kg·m²·s⁻²?
پاسخ
joule (J).
کارت ۸۳
پرسش
For electric resistance, which named SI unit has the coherent base-unit expression kg·m²·s⁻³·A⁻²?
پاسخ
ohm (Ω).
کارت ۸۴
پرسش
For Celsius temperature, which named SI unit has the coherent base-unit expression K?
پاسخ
degree Celsius (°C).
کارت ۸۵
پرسش
For dose equivalent, which named SI unit has the coherent base-unit expression m²·s⁻²?
پاسخ
sievert (Sv).
کارت ۸۶
پرسش
For force, which named SI unit has the coherent base-unit expression kg·m·s⁻²?
پاسخ
newton (N).
کارت ۸۷
پرسش
For electric potential difference, which named SI unit has the coherent base-unit expression kg·m²·s⁻³·A⁻¹?
پاسخ
volt (V).
کارت ۸۸
پرسش
For magnetic flux density, which named SI unit has the coherent base-unit expression kg·s⁻²·A⁻¹?
پاسخ
tesla (T).
کارت ۸۹
پرسش
For activity referred to a radionuclide, which named SI unit has the coherent base-unit expression s⁻¹?
پاسخ
becquerel (Bq).
کارت ۹۰
پرسش
For solid angle, which named SI unit has the coherent base-unit expression 1?
پاسخ
steradian (sr).
کارت ۹۱
پرسش
For power or radiant flux, which named SI unit has the coherent base-unit expression kg·m²·s⁻³?
پاسخ
watt (W).
کارت ۹۲
پرسش
For electric conductance, which named SI unit has the coherent base-unit expression kg⁻¹·m⁻²·s³·A²?
پاسخ
siemens (S).
کارت ۹۳
پرسش
For luminous flux, which named SI unit has the coherent base-unit expression cd·sr?
پاسخ
lumen (lm).
کارت ۹۴
پرسش
For catalytic activity, which named SI unit has the coherent base-unit expression mol·s⁻¹?
پاسخ
katal (kat).
کارت ۹۵
پرسش
For pressure or stress, which named SI unit has the coherent base-unit expression kg·m⁻¹·s⁻²?
پاسخ
pascal (Pa).
کارت ۹۶
پرسش
For capacitance, which named SI unit has the coherent base-unit expression kg⁻¹·m⁻²·s⁴·A²?
پاسخ
farad (F).
کارت ۹۷
پرسش
For inductance, which named SI unit has the coherent base-unit expression kg·m²·s⁻²·A⁻²?
پاسخ
henry (H).
کارت ۹۸
پرسش
For absorbed dose or kerma, which named SI unit has the coherent base-unit expression m²·s⁻²?
پاسخ
gray (Gy).
کارت ۹۹
پرسش
For frequency, which named SI unit has the coherent base-unit expression s⁻¹?
پاسخ
hertz (Hz).
کارت ۱۰۰
پرسش
For electric charge, which named SI unit has the coherent base-unit expression A·s?
پاسخ
coulomb (C).
کارت ۱۰۱
پرسش
For magnetic flux, which named SI unit has the coherent base-unit expression kg·m²·s⁻²·A⁻¹?
پاسخ
weber (Wb).
کارت ۱۰۲
پرسش
For illuminance, which named SI unit has the coherent base-unit expression cd·sr·m⁻²?
پاسخ
lux (lx).
کارت ۱۰۳
پرسش
How are SI unit names capitalized in English?
پاسخ
They normally start with a lowercase letter, even when named after a person. Within this deck, the proper-name modifier in degree Celsius keeps its capital C.
کارت ۱۰۴
پرسش
What determines capitalization in an SI unit symbol?
پاسخ
Symbols derived from proper names start with a capital letter; the others are lowercase. Case is mandatory and meaningful.
کارت ۱۰۵
پرسش
How do SI unit symbols behave in plurals and at sentence endings?
پاسخ
They never take a plural ending, and they take no period unless the symbol ends a sentence. Unit symbols are mathematical symbols, not abbreviations.
کارت ۱۰۶
پرسش
How should a number and an SI unit symbol be spaced?
پاسخ
Put a space between them: 25 m and 20 °C. In °C, the degree sign and C stay together.
کارت ۱۰۷
پرسش
Both hertz and becquerel reduce to s⁻¹. When is each used?
پاسخ
Use hertz (Hz) for periodic phenomena and becquerel (Bq) for activity referred to a radionuclide. The shared expression doesn't make the quantities interchangeable.
کارت ۱۰۸
پرسش
Both gray and sievert reduce to m²·s⁻². What distinguishes them?
پاسخ
Gray (Gy) is used for absorbed dose or kerma; sievert (Sv) is used for dose equivalent. The quantity context determines the special name.
کارت ۱۰۹
پرسش
Radian and steradian both have coherent unit expression 1. What distinguishes them?
پاسخ
Radian (rad) is used for plane angle; steradian (sr) is used for solid angle. Their symbols preserve the quantity context.
کارت ۱۱۰
پرسش
For temperature intervals, how do kelvin and degrees Celsius compare?
پاسخ
A change of 1 K equals a change of 1 °C. Their zero points differ, so absolute temperatures aren't numerically equal.
۱۱۰ کارت
SI Units Flashcards: 7 Base Units & 22 Named Derived Units
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