SI Units Quiz
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Questions and Answers

What is the SI unit of mass?

  • ton
  • milligram
  • kilogram (correct)
  • gram

Which of the following is the SI unit for electric current?

  • ohm
  • ampere (correct)
  • volt
  • watt

Which base unit is defined using the fixed numerical value of the speed of light?

  • second
  • kelvin
  • metre (correct)
  • ampere

What is the SI unit of luminous intensity?

<p>candela (A)</p> Signup and view all the answers

Which of the following quantities is defined using the Avogadro constant?

<p>amount of substance (D)</p> Signup and view all the answers

What is the purpose of a unit in measurement?

<p>To serve as a reference standard for comparison (B)</p> Signup and view all the answers

Which of the following statements accurately describes base units?

<p>Base units can stand alone without any other units (A)</p> Signup and view all the answers

Which measurement system uses the meter, kilogram, and second as its base units?

<p>MKS System (C)</p> Signup and view all the answers

What does SI stand for in the context of measurement systems?

<p>Système Internationale d'Unités (C)</p> Signup and view all the answers

In what year was the SI system revised?

<p>2018 (C)</p> Signup and view all the answers

Flashcards

Base Units

Fundamental units used to measure basic physical quantities.

Derived Units

Units formed by combining base units.

International System of Units (SI)

Internationally accepted system of units used in science and technology.

Physical Quantity

Any property that can be measured.

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Unit

A standard used for measuring a physical quantity.

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SI base unit for length

The metre (m) is the SI unit for length.

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SI base unit for mass

The kilogram (kg) is the SI unit for mass.

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SI base unit for time

The second (s) is the SI unit for time.

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SI base unit for electric current

The ampere (A) is the SI unit for electric current.

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SI base unit for amount of substance

The mole (mol) measures the number of particles.

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