Systems of Units in Physics
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Questions and Answers

What is the SI unit for the fundamental quantity of length?

  • kilometer
  • metre (correct)
  • inch
  • centimeter

Which of the following is a derived unit in the SI system?

  • second
  • velocity (correct)
  • kilogram
  • ampere

What is the SI unit for the fundamental quantity of electric current?

  • ohm
  • ampere (correct)
  • watt
  • volt

Which of the following is a supplementary unit in the SI system?

<p>plane angle (B)</p> Signup and view all the answers

The SI unit of momentum is expressed in terms of which fundamental units?

<p>kg·m/s (C)</p> Signup and view all the answers

What is the relationship between radians and degrees for a plane angle?

<p>1 radian = 180 degrees (A)</p> Signup and view all the answers

Which system of units was recommended by the 14th International general conference on weights and measures in 1971?

<p>SI (B)</p> Signup and view all the answers

What are the seven fundamental quantities of measurement?

<p>Length, mass, time, temperature, electric charge, luminous intensity, amount of substance (B)</p> Signup and view all the answers

What was the main reason for recommending the SI system of units over the CGS, MKS, and FPS systems?

<p>Ease of conversion within the system (A)</p> Signup and view all the answers

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

<p>System International (D)</p> Signup and view all the answers

Which physical quantity is measured in Kelvins (K)?

<p>Temperature (B)</p> Signup and view all the answers

What determines a fundamental quantity?

<p>Does not depend on any other physical quantity (C)</p> Signup and view all the answers

What is the primary purpose of using standard units in measurement?

<p>To allow for easy comparison of measurements (A)</p> Signup and view all the answers

Which of the following is NOT a unit commonly used in a physics laboratory?

<p>Pound (D)</p> Signup and view all the answers

According to the passage, which of the following statements about the relationship between a measured quantity and its unit is true?

<p>The measured quantity is always followed by the corresponding unit. (D)</p> Signup and view all the answers

Which of the following is an example of a physical quantity that would be measured using standard units?

<p>The temperature of a room (A)</p> Signup and view all the answers

Which of the following is not a reason why standard units are used in measurement?

<p>To ensure accuracy of measurements (B)</p> Signup and view all the answers

Which of the following statements about units and measurements is true?

<p>Measurements always involve a comparison to a standard unit (D)</p> Signup and view all the answers

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