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Difficulty: MediumFundamental and Derived Quantities

Which of the following groups consists exclusively of fundamental physical quantities?

  1. Mass, thermodynamic temperature, and luminous intensityAnswer
  2. B
    Mass, length, and electric charge
  3. C
    Electric current, force, and time
  4. D
    Amount of substance, weight, and temperature

Answer

The group containing mass, thermodynamic temperature, and luminous intensity consists exclusively of fundamental physical quantities.
Mass, thermodynamic temperature, and luminous intensity are three of the seven internationally recognized SI base (fundamental) physical quantities.

Step-by-Step Solution

1
Identify the seven fundamental SI physical quantities
The seven base quantities are length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity.
Fundamental quantities are independent quantities that cannot be defined in terms of other physical quantities.
2
Evaluate each provided option against the list of base quantities
Electric charge, force, and weight are derived quantities. Only mass, thermodynamic temperature, and luminous intensity are all fundamental.
Any quantity derived by multiplying or dividing base quantities is derived.

Key Concept

Fundamental quantities are basic physical quantities that are independent of one another and form the basis from which derived quantities are obtained.
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Topics

Fundamental and Derived Quantities

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