Measurements in Physics

Physics SL

Questionbank

Mathematical Tools

Measurements in Physics

All Sub-topics

Measurements in Physics

Uncertainties and Errors

Vectors and Scalars

An important note:

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Measurements and Uncertainties for the new syllabus have been moved to the Tools section of the course. According to the Guide, these “skills in the study of physics can be assessed through internal and external assessment.”
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Even though it is unlikely that you will get multiple choice questions on the topics you find here, you are expected to be familiar with the material in this section and might find these exam-style questions and related video explanations helpful in your learning process.
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Therefore, we decided to include the same explanation for our Question Difficulty Levels and Questionbank Tips as you find in other Questionbank sections.
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We hope you find these helpful :)

Question difficulty level:


Basic


Moderate


Challenging


Difficult


Black Hole


Basic


Moderate


Challenging


Difficult


Black Hole

A bit more about difficulty levels (click)

Basic: Simple, usually one-step or definition-style questions to help you revise the basics.

Moderate: At the level of easier IB exam questions. Slightly more challenging than one-plane problems.

Challenging: Typical, medium-level exam-style questions to help you solidify your knowledge.

Difficult: This is how more challenging IB exam questions look like. If you can solve these with ease, you are in a good shape :)

Black Hole: Extra challenge for those with lightspeed thinking! Very few questions on your exam will be this difficult.

 

Tips on how to get the most out of the Questionbank

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On the questions, in addition to the correct answer (A, B, C or D), you will find:
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• A detailed, step-by-step Video Solution to help you fully understand the concepts used when solving the question.
• A lightning-quick Done Under 90 seconds explanation with shortcuts, tips and tricks to help you save time on Paper 1 multiple choice questions.
• Purple text at the end of all videos to help you remember general concepts (Video Solutions) or to give you exam-taking tips to boost your grade (Done Under 90).
• The thumbnail of each video is set as the worked solution of the question to help you revise these solutions at a glance, without having to play each video individually.

Question 1 

The number of significant figures in 0.02670 is:

  1. 3
  2. 4
  3. 5
  4. 6
Answer

B.

Video Solution

Done Under 90

Question 2 

Which of the following are two fundamental SI units?

  1. mole, kelvin
  2. ampere, pascal
  3. joule, meter
  4. second, newton
Answer

A.

Video Solution

Done Under 90

Question 3 

A ball of 0.18 kg is traveling at a speed of 3.210 m s^{-1}. The mass and the velocity of the ball are used to calculate the magnitude of its momentum. What is the correct number of significant figures for the magnitude of the ball’s momentum?

  1. 2
  2. 3
  3. 4
  4. 5
Answer

A.

Video Solution

Done Under 90

Question 4 

An object of mass 0.0250 kg starts accelerating from rest and reaches a speed of 25.82 m s^{-1}. What is the change in the kinetic energy of the object?

  1. 8 J
  2. 8.3 J
  3. 8.33 J
  4. 8.333 J
Answer

C.

Video Solution

Done Under 90

Question 5 

Which of the following is a fundamental SI unit?

  1. Ampere
  2. Joule
  3. Newton
  4. Coulomb
Answer

A.

Video Solution

Done Under 90

Question 6 

What is the unit of pressure in fundamental SI units? 

  1. N m^{-1}
  2. N m^{-2}
  3. kg m^{-1} s^{-2}
  4. kg m^{-2} s^{-2}
Answer

C.

Video Solution

Done Under 90

Question 7 

The charge of a proton is:

  1. 1.60 \times 10^{-34} PC
  2. 1.60 \times 10^{-22} mC
  3. 1.60 \times 10^{-13} MC
  4. 1.60 \times 10^{-4} pC
Answer

A.

Video Solution

Done Under 90

Question 8 

Which of the following quantities has the fundamental SI unit combination of kg m s^{-1}?

 

  1. Power
  2. Energy
  3. Impulse
  4. Force
Answer

C.

Video Solution

Done Under 90

Question 9 

What is the order of magnitude, in cm, of an adult human being who has an average height?

 

  1. -1
  2. 0
  3. 1
  4. 2
Answer

D.

Video Solution

Done Under 90

Question 10 

An apple is released from rest near the surface of the Earth. It hits the ground after 2 s. What is the best estimate for the apple’s momentum right before it hits the ground?

  1. 3 \times 10^{0} kg m s^{-1}
  2. 3 \times 10^{1} kg m s^{-1}
  3. 3 \times 10^{2} kg m s^{-1}
  4. 3 \times 10^{3} kg m s^{-1}
Answer

A.

Video Solution

Done Under 90

Question 11 

The time it takes for light to cross a helium nucleus is approximately:

  1. 10^{-7} s
  2. 10^{-15} s
  3. 10^{-21} s
  4. 10^{-23} s
Answer

D.

Video Solution

Done Under 90

Question 12 

Which of the following units is equivalent to W m^{-1}?

  1. kg m s^{-2}
  2. kg m^{2} s^{-2}
  3. kg m s^{-3}
  4. kg m^{2} s^{-3}
Answer

C.

Video Solution

Done Under 90

Question 13 

Work done per unit volume has the same units as:

  1. Impulse
  2. Specific energy
  3. Force
  4. Pressure
Answer

D.

Video Solution

Done Under 90

Question 14 

The fundamental SI unit combination for volt is:

  1. kg m^{2} A^{-1} s^{-2}
  2. kg m^{2} A^{-1} s^{-3}
  3. kg m^{2} C^{-1} s^{-2}
  4. kg m^{2} C^{-1} s^{-3}
Answer

B.

Video Solution

Done Under 90

Question 15 

The best estimate for the order of magnitude of the ratio \frac{electron \:  rest \: mass}{neutron \:  rest \:  mass} is:

  1. -3
  2. 3
  3. -4
  4. 4
Answer

A.

Video Solution

Done Under 90

Question 16 

Which of the following is a unit of acceleration?

  1. J kg^{-1} m^{-1}
  2. N kg^{-1} m^{-1}
  3. J kg m^{-1}
  4. N kg m^{-1}
Answer

A.

Video Solution

Done Under 90

Question 17 

What is the size of a carbon nucleus?

  1. 0.0027 fm
  2. 0.0027 pm
  3. 0.0027 nm
  4. 0.0027 \mum
Answer

B.

Video Solution

Done Under 90

Question 18 

A coal-fired power plant uses 9 \times 10^{6} kg of coal per day. All the coal that is used in the power plant is composed of carbon-12 atoms. 

What is the best estimate for the number of carbon-12 atoms used per month in the power plant?

  1. 10^{9}
  2. 10^{24}
  3. 10^{31}
  4. 10^{34}
Answer

D.

Video Solution

Done Under 90

Question 19 

A cube-shaped container is filled with 1000 litres of water. The density of water 1 g cm^{-3}. The difference in the orders of magnitude of the diameter of a water molecule and the side length of the container is:

  1. 14
  2. 12
  3. 10
  4. 8
Answer

C.

Video Solution

Done Under 90