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