Units and Measurement Chapter 1 Quiz
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Questions and Answers

How is the result of a measurement of a physical quantity typically expressed?

  • With a formula
  • As a number accompanied by a unit (correct)
  • As a ratio
  • With a conversion factor
  • What is the basic reference standard called for the measurement of any physical quantity?

  • Fundamental unit (correct)
  • Derived unit
  • International system
  • Dimension
  • What are the units for the fundamental or base quantities known as?

  • International units
  • Derived units
  • Fundamental units (correct)
  • Basic units
  • How are the units of all other physical quantities expressed?

    <p>As combinations of base units</p> Signup and view all the answers

    What do we call the set of both base units and derived units together?

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

    Which system of units was extensively used by scientists in earlier times?

    <p>CGS system</p> Signup and view all the answers

    What is the unit for plane angle?

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

    Which base quantity is measured in kilograms?

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

    What is the SI unit for time?

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

    Which unit has the symbol 'sr'?

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

    What is the SI unit of electric current?

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

    Which SI base quantity is defined by the speed of light in vacuum?

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

    Which of the following systems uses foot, pound, and second as base units?

    <p>FPS system</p> Signup and view all the answers

    Which international system has seven base units as defined in Table 1.1?

    <p>SI system</p> Signup and view all the answers

    What is the definition of plane angle (dθ) in SI units?

    <p>Ratio of length of arc to radius</p> Signup and view all the answers

    Why are conversions within the SI system considered simple and convenient?

    <p>Because it uses a decimal system</p> Signup and view all the answers

    What organization developed the standard scheme of symbols, units, and abbreviations for the SI system in 1971?

    <p>Bureau International des Poids et Mesures (BIPM)</p> Signup and view all the answers

    Which system is currently internationally accepted for measurement?

    <p>SI system</p> Signup and view all the answers

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