0%

DP IB Physics: HL

Topic Questions

Home / IB / Physics: HL / DP / Topic Questions / 1. Measurement & Uncertainties / 1.1 Measurements in Physics / Structured Questions


1.1 Measurements in Physics

Question 1a

Marks: 3
(a)
Define 1 Farad in fundamental SI units.
    Assess your score
      
    Key Concepts
    SI Units

    Question 1b

    Marks: 3

    A parallel plate capacitor of capacitance 86 µF is connected to a 6.00 kV power supply. 

    (b)
    Calculate the charge between the plates in mC. Give your answer to an appropriate number of significant figures.

      Assess your score
        

      Question 1c

      Marks: 4
      (c)
      List the following capacitance in increasing magnitude: 
       

      100 pF, 0.1 µF, 100 cF, 0.01 fF

        Assess your score
          

        Question 1d

        Marks: 3
        (d)
        Estimate the current through a 1700 W kettle connected to a UK mains supply.
          Assess your score
            

          Question 2a

          Marks: 4

          Pressure at a certain depth in a fluid can be calculated using the value for the density of the fluid, the gravitational field constant g and the depth within the fluid. 

          (a)
          State the following measurements in standard form:

          (i)         20 000 kPa

          (ii)        0.18 Gm

          (iii)       1.15 μg

          (iv)       82.6 pN

            Assess your score
              

            Question 2b

            Marks: 3

            Pressure is measured in pascals. 

            (b)
            Define 1 Pascal in fundamental SI units.
              Assess your score
                
              Key Concepts
              SI Units

              Question 2c

              Marks: 2

              Atmospheric pressure on Earth is 101 325 Pa. The Mariana trench at the bottom of the western Pacific Ocean has a pressure of around 110 MPa.

              (c)
              Calculate how many times larger the pressure in the Mariana trench is than the atmospheric pressure on Earth.
                Assess your score
                  
                Key Concepts
                Orders of Magnitude

                Question 2d

                Marks: 3

                Pressure changes with depth, as well as force and area.

                (d)
                List the following in order of decreasing pressure:
                • Atmospheric pressure at the summit of Mount Everest
                • Surface pressure on the Moon
                • Atmospheric pressure ~ 101 kPa
                • Water pressure of an average garden hose
                • The Mariana trench ~ 110 MPa
                  Assess your score
                    
                  Key Concepts
                  Orders of Magnitude

                  Question 3a

                  Marks: 4

                  An electron microscope is used to analyse the arrangement of atoms and their nuclei on a new design for a special sheet of silver foil. The foil is a new material being added to various components in a military medical aircraft. 

                  (a)

                  Estimate the orders of magnitude with an appropriate fundamental SI unit and correct prefix for the following quantities 

                  Quantity

                  Order of magnitude

                  Mass of an aeroplane

                   

                  Radius of a proton

                   

                  Current through an LED

                   

                  Time between two heart beats

                   

                   

                    Assess your score
                      

                    Question 3b

                    Marks: 3

                    The sheet of silver foil has a thickness of 0.992 µm. A silver atom has a radius of 172 pm. 

                    (b)
                    Approximate how many layers of atoms there are in this sheet.
                      Assess your score
                        

                      Question 3c

                      Marks: 4

                      Using the electron microscope, the cross–sectional area of the silver nuclei can be measured accurately in units of ‘barn’, with symbol b. 

                      1 barn = 100 fm2 

                      (c)
                      Calculate the value of 1 nb in m2
                        Assess your score
                          
                        Key Concepts
                        Orders of Magnitude

                        Question 3d

                        Marks: 4

                        Einstein’s famous equation Energy (J) = Mass (kg) × (Speed of light (m s–1))2­ demonstrates that energy and matter are interchangeable.

                        Atomic mass unit, 1 u = 931.5 MeV

                        1 eV = 1.60 × 1019 J

                        (d)
                        Use this equation to show that the value in kg of 1 u of silver in the foil is approximately equal to the mass of a proton in kg.  
                          Assess your score
                            

                          Question 4a

                          Marks: 3

                          X–ray pulsars are detected by X–ray telescopes on a satellite in low Earth orbit 2000 km above the surface of the Earth. 

                          (a)
                          Calculate the number of cubic millimetres (mm3) in a volume of 2000 km3.
                            Assess your score
                              

                            Question 4b

                            Marks: 4

                            X–rays from a pulsar travel at the speed of light and are detected on Earth with a wavelength of 8.0 nm. 

                            (b)
                            Calculate the frequency of the X–rays in PHz. Give your answer to an appropriate number of significant figures. . 
                              Assess your score
                                

                              Question 4c

                              Marks: 3

                              X–rays from the nearest pulsar PSR J0109–1431 take 8.82 Gs to travel to Earth. 

                              (c)
                              Calculate the number of oscillations of the X–rays from the pulsar to the surface of the Earth. Give your answer to an appropriate number of significant figures.
                                Assess your score
                                  

                                Question 4d

                                Marks: 3
                                (d)
                                Show the distance from Earth to PSR J0109–1431 is around 280 light years.
                                  Assess your score
                                    

                                  Question 5a

                                  Marks: 5

                                  A student conducts an experiment to study the variation of resistance R of a negative temperature coefficient (NCT) thermistor with temperature T. The data from the experiment is shown plotted on the graph.

                                  q5_measurements-in-physics_ib-sl-physics-sq-medium The electric current through the thermistor for T = 283 K is 0.0078 mA. 

                                  (a)
                                  What is the units of resistance R in SI units?
                                    Assess your score
                                      
                                    Key Concepts
                                    SI Units

                                    Question 5b

                                    Marks: 2
                                    (b)
                                    Convert 0.0078 mA to A and write in standard form.
                                      Assess your score
                                        

                                      Question 5c

                                      Marks: 3
                                      (c)

                                      Calculate the ratio R over T when T = 291 K. Write your answer in fundamental SI units to an appropriate number of significant figures.

                                        Assess your score
                                          
                                        Key Concepts
                                        Orders of Magnitude

                                        Question 5d

                                        Marks: 1
                                        (d)
                                        Estimate the resistance of the thermistor at a temperature of 335 K
                                          Assess your score