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Difficulty: EasyFundamental and Derived Quantities

Which of the following physical quantities is classified as a fundamental quantity in the International System of Units (SI)?

  1. Electric currentAnswer
  2. B
    Force
  3. C
    Velocity
  4. D
    Density

Answer

Electric current
Electric current is one of the seven fundamental physical quantities defined by the International System of Units (SI). It serves as a base quantity from which other electrical quantities (such as charge and potential difference) are derived.

Step-by-Step Solution

1
Identify the definition of a fundamental quantity
Fundamental quantities are independent physical quantities that cannot be expressed in terms of other quantities.
SI defines seven basic quantities: length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity.
2
Evaluate the options against the list of SI fundamental quantities
Electric current is a basic quantity (measured in amperes, AA), whereas force, velocity, and density are derived from mass, length, and time.
Only electric current is an independent base quantity.

Key Concept

Fundamental quantities are basic physical quantities that are independent of other quantities.
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Topics

Fundamental and Derived Quantities

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