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The following is not a fundamental SI unit
1. Ampere
2. Candela
3. Newton
4. Kelvin

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Correct Answer - Option 3 : Newton


  • Fundamental Quantity: An independent Physical Quantity that cannot be expressed in terms of other Physical Quantities is called fundamental quantity.
    • They are conventionally chosen. It is used as a base to get other derived quantities by combining them.
  • Fundamental unit: The SI unit of a fundamental quantity is called a fundamental unit.
    • There are 7 fundamental quantities and their fundamental units.
    • The fundamental Quantities are Length, Mass, Time, Electric Current, Thermodynamic Temperature, Luminous intensity, etc.
  • ​Supplementary units:  The units that are used along with base units to form derived units in the International System are called supplementary units.
Fundamental Quantities
Quantities S.I unit
Mass  Kilogram(kg)
Length meter(m)
Time second(s)
Amount of Substance Mole(mol)
Temperature Kelvin(K)
Electric Current Ampere(A)
Luminous intensity Candela(cd)
Supplementary Quantities
Plane angle  radian(rad)
Solid angle steradian(Sr)
Derived Quantities
Force Newton(N)
Work Joule(J), calorie
Pressure Pascal(Pa)
Power Watt(W)


  • Newton is not a fundamental unit it is a Derived S.I unit. 

So option Newton  is correct.

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