Units and Measurements: Introduction to Physical Quantities and Units
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Questions and Answers

What are the units for the fundamental or base quantities called?

  • Primary units
  • Reference units
  • Fundamental units (correct)
  • Basic units

    • What is the result of a measurement of a physical quantity expressed by?

  • A number without a unit
  • A unit without a number
  • A variable without a unit
  • A number accompanied by a unit (correct)

    • What are the units obtained for the derived quantities called?

  • Derived quantities units
  • Derived units (correct)
  • Composite units
  • Secondary units

    • What is a complete set of units, both base units and derived units, known as?

    <p>System of units</p> Signup and view all the answers

    What were the base units for length, mass, and time in the FPS system?

    <p>Foot, pound, second</p> Signup and view all the answers

    What does the CGS system stand for?

    <p>Centimetre-Gram-Second system</p> Signup and view all the answers

    What type of comparison is involved in the measurement of any physical quantity?

    <p>Comparison with a fixed quantity</p> Signup and view all the answers

    What do we need only a limited number of for expressing all physical quantities?

    <p>Units</p> Signup and view all the answers

    What are the units for expressing all other physical quantities as combinations of the base units called?

    <p>Derived units</p> Signup and view all the answers

    What do scientists of different countries use for measurement?

    <p>Different systems of units</p> Signup and view all the answers

    What is the result of a measurement of a physical quantity expressed by?

    <p>A number accompanied by a unit</p> Signup and view all the answers

    What are the units for the fundamental or base quantities called?

    <p>Fundamental units</p> Signup and view all the answers

    What type of comparison is involved in the measurement of any physical quantity?

    <p>Comparison with a chosen reference standard</p> Signup and view all the answers

    What is a complete set of units, both the base units and derived units, known as?

    <p>System of units</p> Signup and view all the answers

    What were the base units for length, mass, and time in the CGS system?

    <p>Centimetre, gram, second</p> Signup and view all the answers

    In the FPS system, what were the base units for length, mass, and time?

    <p>Foot, pound, second</p> Signup and view all the answers

    What do we need only a limited number of for expressing all physical quantities?

    <p>Units</p> Signup and view all the answers

    What are the units obtained for derived quantities called?

    <p>Derived units</p> Signup and view all the answers

    Which systems of units were extensively in use till recently?

    <p>CGS, FPS (or British), MKS</p> Signup and view all the answers

    What is used as an internationally accepted reference standard in measurement?

    <p>Unit</p> Signup and view all the answers

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