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Difficulty: EasyFundamental and Derived Units

In the International System of Units (SI), physical quantities are categorized as either fundamental or derived. Which of the following is a fundamental SI base unit?

  1. A
    Joule
  2. KelvinAnswer
  3. C
    Pascal
  4. D
    Watt

Answer

Kelvin is the fundamental SI base unit.
The kelvin is the standard SI base unit for measuring thermodynamic temperature and is one of the seven defined fundamental units.

Step-by-Step Solution

1
Identify the seven SI fundamental (base) units
The seven fundamental SI base units are the meter (m), kilogram (kg), second (s), ampere (A), kelvin (K), mole (mol), and candela (cd).
Fundamental units are basic units that are independent of one another and cannot be expressed in terms of other units.
2
Compare the given options against the set of fundamental units
Among Joule, Kelvin, Pascal, and Watt, only Kelvin is in the list of fundamental SI base units.
Joule, Pascal, and Watt are all derived units defined by combinations of base units.

Key Concept

Fundamental SI Base Units
Estimated Time:35s
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Topics

Fundamental and Derived Units

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