Physics 1.2 - Measurements And Uncertainties

Approved & Edited by ProProfs Editorial Team
The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.
Learn about Our Editorial Process
| By Marcbrunssen
M
Marcbrunssen
Community Contributor
Quizzes Created: 3 | Total Attempts: 2,360
Questions: 7 | Attempts: 938

SettingsSettingsSettings
Physics 1.2 - Measurements And Uncertainties - Quiz

Questions and Answers
  • 1. 

    The age of the universe is 14 billion years. How many seconds is 14 billion years closest to?

    Correct Answer
    C.
    Explanation
    14 billions years  years secs.
    If 1 year is converted to seconds, you will get wrong answer A. If only billion years get converted to years, you will get the wrong answer B.

    Rate this question:

  • 2. 

    Which of the following is equivalent to the derives unit J? J is the unit of work.

    Correct Answer
    C.
    Explanation
    Because we have work = force x distance = mass x acceleration x distance. Thus we have, considering an object of 1 kg get moved at for  , then the work will equal to
    work =  

    Rate this question:

  • 3. 

    If the diameter of an atom is about 100pm, what is diameter in terms of km?

    Correct Answer
    C.
    Explanation
    100 pm= 100pm x

    If you calculate 100 m in terms of km, then you will get wrong answer A. If you calculate 100 pm in terms of m, then you will get wrong answer C. If you calculate 1pm in terms of km, you will get wrong answer E.

    Rate this question:

  • 4. 

    Which of the following is SI base unit?

    • A.

      Degree Celsius

    • B.

      Ampere

    • C.

      Coulomb

    • D.

      Gram

    Correct Answer
    B. Ampere
    Explanation
    Ampere is the SI base unit for current.

    Degree Celsius is not temperature’s SI unit. It should be Kelvin. So A is wrong.

    Coulomb is a derived SI unit. It is the unit of charge, which is equivalent to . So C is wrong

    Gram is not the base unit. The base unit for mass is kilogram. So D is wrong

    Year is not the base unit. The base unit for time is second. So E is wrong

    Rate this question:

  • 5. 

    A chemist is pouring some solution from a volumetric cylinder to a tube to perform some experiment. Before he pours the solution, he finds the volume of the solution is . After he pours the solution, he finds the volume of the solution is . What is the volume of the solution he pours into the tube?  

    Correct Answer
    C.
    Explanation
    We calculate the measurement of the solution by subtracting the remaining solution from the original solution, so we have .
    Even if we use subtraction to find the volume of the solution that is poured out, we will add the uncertainties. So the uncertainty of the volume of the solution is 
    But it does not make sense to record the measurement of the solution 5.2 mL if the uncertainty is 1 mL. So the volume of the solution is actually .
    If you forget to add the uncertainty, you will get wrong answer A. If you subtract the uncertainty, you will get wrong answer D. If you did not change your measurement according to the new uncertainty, you will get wrong answer B.

    Rate this question:

  • 6. 

    All the following are all systematic errors except...?

    • A.

      The flow of air causing the reading of the temperature to change from time to time

    • B.

      A volumetric cylinder that is used to measure the volume of the liquid has a bump on the cylinder.

    • C.

      An ammeter shows a current of 0.1 A before we link it to the circuit.

    • D.

      A student uses a ruler and reads his measurement always on one side of the reading.

    Correct Answer
    A. The flow of air causing the reading of the temperature to change from time to time
    Explanation
    The air flow can decrease or increase the temperature reading, so it is a random error.

    If a volumetric cylinder has a bump, then the liquid will be always more than the reading. So it is a systematic error.

    If an ammeter has a zero error of 0.1 A, then the reading of the ammeter would be always more than the current in the circuit. So it is a systematic error.

    If a student did not read the ruler with his eye directly above the ruler, he will always get a measurement smaller (standing on the left of the ruler), or bigger (standing on the right of the ruler). So it is a systematic error.

    Rate this question:

  • 7. 

    Which of the following measurements have three significant digits?

    • A.

      A table is reported to be 1.356 meters

    • B.

      A fly is measured to be 0.012 grams

    • C.

      An airplane is as heavy as 500 tons

    • D.

      A currant in a circuit is 20.0 mA

    Correct Answer
    D. A currant in a circuit is 20.0 mA
    Explanation
    Because of the decimal point, the zeroes on the right of 2 of choice D do count. So D has 3 significant digits.

    Choice A has 4 significant digits.
    Choice B has 2 significant digits, because the zeroes on the left do not count
    Choice C has 1 significant digit, because the zeroes on the right do not count without a decimal point.

    Rate this question:

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 10, 2012
    Quiz Created by
    Marcbrunssen
Back to Top Back to top
Advertisement
×

Wait!
Here's an interesting quiz for you.

We have other quizzes matching your interest.