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.
اس ڈیک کے بارے میں
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
-
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.
اس ڈیک کے کارڈز
کارڈ 1
سوال
What is the SI base unit for time?
جواب
second (s).
کارڈ 2
سوال
What is the SI base unit for length?
جواب
metre (m).
کارڈ 3
سوال
What is the SI base unit for mass?
جواب
kilogram (kg).
کارڈ 4
سوال
What is the SI base unit for electric current?
جواب
ampere (A).
کارڈ 5
سوال
What is the SI base unit for thermodynamic temperature?
جواب
kelvin (K).
کارڈ 6
سوال
What is the SI base unit for amount of substance?
جواب
mole (mol).
کارڈ 7
سوال
What is the SI base unit for luminous intensity?
جواب
candela (cd).
کارڈ 8
سوال
Which SI base quantity uses the second (s)?
جواب
Time.
کارڈ 9
سوال
Which SI base quantity uses the metre (m)?
جواب
Length.
کارڈ 10
سوال
Which SI base quantity uses the kilogram (kg)?
جواب
Mass.
کارڈ 11
سوال
Which SI base quantity uses the ampere (A)?
جواب
Electric current.
کارڈ 12
سوال
Which SI base quantity uses the kelvin (K)?
جواب
Thermodynamic temperature.
کارڈ 13
سوال
Which SI base quantity uses the mole (mol)?
جواب
Amount of substance.
کارڈ 14
سوال
Which SI base quantity uses the candela (cd)?
جواب
Luminous intensity.
کارڈ 15
سوال
Which SI unit with a special name is used for plane angle?
جواب
radian (rad).
کارڈ 16
سوال
Which SI unit with a special name is used for energy, work, or amount of heat?
جواب
joule (J).
کارڈ 17
سوال
Which SI unit with a special name is used for electric resistance?
جواب
ohm (Ω).
کارڈ 18
سوال
Which SI unit with a special name is used for Celsius temperature?
جواب
degree Celsius (°C).
کارڈ 19
سوال
Which SI unit with a special name is used for dose equivalent?
جواب
sievert (Sv).
کارڈ 20
سوال
Which SI unit with a special name is used for force?
جواب
newton (N).
کارڈ 21
سوال
Which SI unit with a special name is used for electric potential difference?
جواب
volt (V).
کارڈ 22
سوال
Which SI unit with a special name is used for magnetic flux density?
جواب
tesla (T).
کارڈ 23
سوال
Which SI unit with a special name is used for activity referred to a radionuclide?
جواب
becquerel (Bq).
کارڈ 24
سوال
Which SI unit with a special name is used for solid angle?
جواب
steradian (sr).
کارڈ 25
سوال
Which SI unit with a special name is used for power or radiant flux?
جواب
watt (W).
کارڈ 26
سوال
Which SI unit with a special name is used for electric conductance?
جواب
siemens (S).
کارڈ 27
سوال
Which SI unit with a special name is used for luminous flux?
جواب
lumen (lm).
کارڈ 28
سوال
Which SI unit with a special name is used for catalytic activity?
جواب
katal (kat).
کارڈ 29
سوال
Which SI unit with a special name is used for pressure or stress?
جواب
pascal (Pa).
کارڈ 30
سوال
Which SI unit with a special name is used for capacitance?
جواب
farad (F).
کارڈ 31
سوال
Which SI unit with a special name is used for inductance?
جواب
henry (H).
کارڈ 32
سوال
Which SI unit with a special name is used for absorbed dose or kerma?
جواب
gray (Gy).
کارڈ 33
سوال
Which SI unit with a special name is used for frequency?
جواب
hertz (Hz).
کارڈ 34
سوال
Which SI unit with a special name is used for electric charge?
جواب
coulomb (C).
کارڈ 35
سوال
Which SI unit with a special name is used for magnetic flux?
جواب
weber (Wb).
کارڈ 36
سوال
Which SI unit with a special name is used for illuminance?
جواب
lux (lx).
کارڈ 37
سوال
What quantity uses the radian (rad)?
جواب
Plane angle.
کارڈ 38
سوال
What quantity uses the joule (J)?
جواب
Energy, work, and amount of heat.
کارڈ 39
سوال
What quantity uses the ohm (Ω)?
جواب
Electric resistance.
کارڈ 40
سوال
What quantity uses the degree Celsius (°C)?
جواب
Celsius temperature.
کارڈ 41
سوال
What quantity uses the sievert (Sv)?
جواب
Dose equivalent.
کارڈ 42
سوال
What quantity uses the newton (N)?
جواب
Force.
کارڈ 43
سوال
What quantity uses the volt (V)?
جواب
Electric potential difference.
کارڈ 44
سوال
What quantity uses the tesla (T)?
جواب
Magnetic flux density.
کارڈ 45
سوال
What quantity uses the becquerel (Bq)?
جواب
Activity referred to a radionuclide.
کارڈ 46
سوال
What quantity uses the steradian (sr)?
جواب
Solid angle.
کارڈ 47
سوال
What quantity uses the watt (W)?
جواب
Power and radiant flux.
کارڈ 48
سوال
What quantity uses the siemens (S)?
جواب
Electric conductance.
کارڈ 49
سوال
What quantity uses the lumen (lm)?
جواب
Luminous flux.
کارڈ 50
سوال
What quantity uses the katal (kat)?
جواب
Catalytic activity.
کارڈ 51
سوال
What quantity uses the pascal (Pa)?
جواب
Pressure and stress.
کارڈ 52
سوال
What quantity uses the farad (F)?
جواب
Capacitance.
کارڈ 53
سوال
What quantity uses the henry (H)?
جواب
Inductance.
کارڈ 54
سوال
What quantity uses the gray (Gy)?
جواب
Absorbed dose and kerma.
کارڈ 55
سوال
What quantity uses the hertz (Hz)?
جواب
Frequency.
110 کارڈز
SI Units Flashcards: 7 Base Units & 22 Named Derived Units
یہ ڈیک مفت پڑھیںمطالعہ شروع کرنے کے لیے Nibomo کھلے گا۔
کارڈ 56
سوال
What quantity uses the coulomb (C)?
جواب
Electric charge.
کارڈ 57
سوال
What quantity uses the weber (Wb)?
جواب
Magnetic flux.
کارڈ 58
سوال
What quantity uses the lux (lx)?
جواب
Illuminance.
کارڈ 59
سوال
Express the radian (rad) in coherent SI base units.
جواب
1. The symbol rad keeps the plane-angle context explicit.
کارڈ 60
سوال
Express the joule (J) in coherent SI base units.
جواب
kg·m²·s⁻².
کارڈ 61
سوال
Express the ohm (Ω) in coherent SI base units.
جواب
kg·m²·s⁻³·A⁻².
کارڈ 62
سوال
Express the degree Celsius (°C) in coherent SI base units.
جواب
K. A degree Celsius and a kelvin have the same size; their zero points differ.
کارڈ 63
سوال
Express the sievert (Sv) in coherent SI base units.
جواب
m²·s⁻².
کارڈ 64
سوال
Express the newton (N) in coherent SI base units.
جواب
kg·m·s⁻².
کارڈ 65
سوال
Express the volt (V) in coherent SI base units.
جواب
kg·m²·s⁻³·A⁻¹.
کارڈ 66
سوال
Express the tesla (T) in coherent SI base units.
جواب
kg·s⁻²·A⁻¹.
کارڈ 67
سوال
Express the becquerel (Bq) in coherent SI base units.
جواب
s⁻¹. Use Bq for stochastic nuclear transformations, not periodic phenomena.
کارڈ 68
سوال
Express the steradian (sr) in coherent SI base units.
جواب
1. The symbol sr keeps the solid-angle context explicit.
کارڈ 69
سوال
Express the watt (W) in coherent SI base units.
جواب
kg·m²·s⁻³.
کارڈ 70
سوال
Express the siemens (S) in coherent SI base units.
جواب
kg⁻¹·m⁻²·s³·A².
کارڈ 71
سوال
Express the lumen (lm) in coherent SI base units.
جواب
cd·sr. Since sr has unit one, this is dimensionally cd; sr keeps the solid-angle context explicit.
کارڈ 72
سوال
Express the katal (kat) in coherent SI base units.
جواب
mol·s⁻¹.
کارڈ 73
سوال
Express the pascal (Pa) in coherent SI base units.
جواب
kg·m⁻¹·s⁻².
کارڈ 74
سوال
Express the farad (F) in coherent SI base units.
جواب
kg⁻¹·m⁻²·s⁴·A².
کارڈ 75
سوال
Express the henry (H) in coherent SI base units.
جواب
kg·m²·s⁻²·A⁻².
کارڈ 76
سوال
Express the gray (Gy) in coherent SI base units.
جواب
m²·s⁻².
کارڈ 77
سوال
Express the hertz (Hz) in coherent SI base units.
جواب
s⁻¹. Use Hz for periodic phenomena.
کارڈ 78
سوال
Express the coulomb (C) in coherent SI base units.
جواب
A·s.
کارڈ 79
سوال
Express the weber (Wb) in coherent SI base units.
جواب
kg·m²·s⁻²·A⁻¹.
کارڈ 80
سوال
Express the lux (lx) in coherent SI base units.
جواب
cd·sr·m⁻². Since sr has unit one, this is dimensionally cd·m⁻²; sr keeps the solid-angle context explicit.
کارڈ 81
سوال
For plane angle, which named SI unit has the coherent base-unit expression 1?
جواب
radian (rad).
کارڈ 82
سوال
For energy, work, or amount of heat, which named SI unit has the coherent base-unit expression kg·m²·s⁻²?
جواب
joule (J).
کارڈ 83
سوال
For electric resistance, which named SI unit has the coherent base-unit expression kg·m²·s⁻³·A⁻²?
جواب
ohm (Ω).
کارڈ 84
سوال
For Celsius temperature, which named SI unit has the coherent base-unit expression K?
جواب
degree Celsius (°C).
کارڈ 85
سوال
For dose equivalent, which named SI unit has the coherent base-unit expression m²·s⁻²?
جواب
sievert (Sv).
کارڈ 86
سوال
For force, which named SI unit has the coherent base-unit expression kg·m·s⁻²?
جواب
newton (N).
کارڈ 87
سوال
For electric potential difference, which named SI unit has the coherent base-unit expression kg·m²·s⁻³·A⁻¹?
جواب
volt (V).
کارڈ 88
سوال
For magnetic flux density, which named SI unit has the coherent base-unit expression kg·s⁻²·A⁻¹?
جواب
tesla (T).
کارڈ 89
سوال
For activity referred to a radionuclide, which named SI unit has the coherent base-unit expression s⁻¹?
جواب
becquerel (Bq).
کارڈ 90
سوال
For solid angle, which named SI unit has the coherent base-unit expression 1?
جواب
steradian (sr).
کارڈ 91
سوال
For power or radiant flux, which named SI unit has the coherent base-unit expression kg·m²·s⁻³?
جواب
watt (W).
کارڈ 92
سوال
For electric conductance, which named SI unit has the coherent base-unit expression kg⁻¹·m⁻²·s³·A²?
جواب
siemens (S).
کارڈ 93
سوال
For luminous flux, which named SI unit has the coherent base-unit expression cd·sr?
جواب
lumen (lm).
کارڈ 94
سوال
For catalytic activity, which named SI unit has the coherent base-unit expression mol·s⁻¹?
جواب
katal (kat).
کارڈ 95
سوال
For pressure or stress, which named SI unit has the coherent base-unit expression kg·m⁻¹·s⁻²?
جواب
pascal (Pa).
کارڈ 96
سوال
For capacitance, which named SI unit has the coherent base-unit expression kg⁻¹·m⁻²·s⁴·A²?
جواب
farad (F).
کارڈ 97
سوال
For inductance, which named SI unit has the coherent base-unit expression kg·m²·s⁻²·A⁻²?
جواب
henry (H).
کارڈ 98
سوال
For absorbed dose or kerma, which named SI unit has the coherent base-unit expression m²·s⁻²?
جواب
gray (Gy).
کارڈ 99
سوال
For frequency, which named SI unit has the coherent base-unit expression s⁻¹?
جواب
hertz (Hz).
کارڈ 100
سوال
For electric charge, which named SI unit has the coherent base-unit expression A·s?
جواب
coulomb (C).
کارڈ 101
سوال
For magnetic flux, which named SI unit has the coherent base-unit expression kg·m²·s⁻²·A⁻¹?
جواب
weber (Wb).
کارڈ 102
سوال
For illuminance, which named SI unit has the coherent base-unit expression cd·sr·m⁻²?
جواب
lux (lx).
کارڈ 103
سوال
How are SI unit names capitalized in English?
جواب
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.
کارڈ 104
سوال
What determines capitalization in an SI unit symbol?
جواب
Symbols derived from proper names start with a capital letter; the others are lowercase. Case is mandatory and meaningful.
کارڈ 105
سوال
How do SI unit symbols behave in plurals and at sentence endings?
جواب
They never take a plural ending, and they take no period unless the symbol ends a sentence. Unit symbols are mathematical symbols, not abbreviations.
کارڈ 106
سوال
How should a number and an SI unit symbol be spaced?
جواب
Put a space between them: 25 m and 20 °C. In °C, the degree sign and C stay together.
کارڈ 107
سوال
Both hertz and becquerel reduce to s⁻¹. When is each used?
جواب
Use hertz (Hz) for periodic phenomena and becquerel (Bq) for activity referred to a radionuclide. The shared expression doesn't make the quantities interchangeable.
کارڈ 108
سوال
Both gray and sievert reduce to m²·s⁻². What distinguishes them?
جواب
Gray (Gy) is used for absorbed dose or kerma; sievert (Sv) is used for dose equivalent. The quantity context determines the special name.
کارڈ 109
سوال
Radian and steradian both have coherent unit expression 1. What distinguishes them?
جواب
Radian (rad) is used for plane angle; steradian (sr) is used for solid angle. Their symbols preserve the quantity context.
کارڈ 110
سوال
For temperature intervals, how do kelvin and degrees Celsius compare?
جواب
A change of 1 K equals a change of 1 °C. Their zero points differ, so absolute temperatures aren't numerically equal.
110 کارڈز
SI Units Flashcards: 7 Base Units & 22 Named Derived Units
مطالعہ شروع کرنے کے لیے Nibomo کھلے گا۔