SI units — Paper 1 · A Level Physics 9702

1 Which line of the table gives values that are equal to a time of 1 ps (one picosecond) and a distance of 1 Gm (one gigametre)? time of 1 ps distance of 1 Gm A 10–9 s 109 m B 10–9 s 1012 m C 10–12 s 109 m D 10–12 s 1012 m

1 marks

Answer: C

This question in 9702/11 Oct/Nov 2004

3 When a beam of light is incident on a surface, it delivers energy to the surface. The intensity of the beam is defined as the energy delivered per unit area per unit time. What is the unit of intensity, expressed in SI base units? A kg m–2 s–1 B kg m2 s–3 C kg s–2 D kg s–3

1 marks

Answer: D

This question in 9702/11 Oct/Nov 2004

1 Which pair of units are both SI base units? A ampere, degree celsius B ampere, kelvin C coulomb, degree celsius D coulomb, kelvin

1 marks

Answer: B

This question in 9702/11 Oct/Nov 2005

2 The prefix ‘centi’ indicates x 10–2. Which line in the table correctly indicates the prefixes micro, nano and pico? x 10–12 x 10–9 x 10–6 A nano micro pico B nano pico micro C pico nano micro D pico micro nano

1 marks

Answer: C

This question in 9702/11 Oct/Nov 2005

3 Which expression involving base units is equivalent to the volt? A kg m2 s–1 A–1 B kg m s–2 A C kg m2 s–1 A D kg m2 s–3 A–1

1 marks

Answer: D

This question in 9702/11 Oct/Nov 2005

3 Which row of the table shows a physical quantity and its correct unit? physical quantity unit A electric field strength kg m s–2 C–1 B specific heat capacity kg–1 m2 s–2 K–1 C tensile strain kg m–1 s–2 D the Young modulus kg m–1 s–3

1 marks

Answer: A

This question in 9702/11 Oct/Nov 2006

1 Which is a pair of SI base units? A ampere joule B coulomb second C kilogram kelvin D metre newton 1µ m

1 marks

Answer: C

This question in 9702/11 May/June 2007

2 What is the ratio ? 1 Gm A 10–3 B 10–9 C 10–12 D 10–15

1 marks

Answer: D

This question in 9702/11 May/June 2007

2 Which of the following correctly expresses the volt in terms of SI base units? A A Ω B W A–1 C kg m2 s–1 A–1 D kg m2 s–3 A–1

1 marks

Answer: D

This question in 9702/11 May/June 2008

2 At temperatures close to 0 K, the specific heat capacity c of a particular solid is given by c = bT 3, where T is the thermodynamic temperature and b is a constant characteristic of the solid. What are the units of constant b, expressed in SI base units? A m2 s –2 K–3 B m2 s–2 K–4 C kg m2 s–2 K–3 D kg m2 s–2 K–4

1 marks

Answer: B

This question in 9702/11 Oct/Nov 2008

1 Which statement, involving multiples and sub-multiples of the base unit metre (m), is correct? A 1 pm = 10–9 m B 1 nm = 10–6 m C 1 mm = 106 µm D 1 km = 106 mm

1 marks

Answer: D

This question in 9702/11 May/June 2009

1 The drag force F acting on a moving sphere obeys an equation of the form F = kAv 2, where A represents the sphere’s frontal area and v represents its speed. What are the base units of the constant k ? A kg m5 s–4 B kg m–2 s–1 C kg m–3 D kg m–4 s2

1 marks

Answer: C

This question in 9702/11 Oct/Nov 2009

2 The table contains some quantities, together with their symbols and units. quantity symbol unit gravitational field strength g N kg–1 density of liquid ρ kg m–3 vertical height h m volume of part of liquid V m3 Which expression has the units of energy? ρ hV ρ g ρ g2h A gρ hV B C D g hV Space for working

1 marks

Answer: A

This question in 9702/11 Oct/Nov 2009

1 The drag force F acting on a moving sphere obeys an equation of the form F = kAv 2, where A represents the sphere’s frontal area and v represents its speed. What are the base units of the constant k ? A kg m5 s–4 B kg m–2 s–1 C kg m–3 D kg m–4 s2

1 marks

Answer: C

This question in 9702/12 Oct/Nov 2009

40 The table contains some quantities, together with their symbols and units. quantity symbol unit gravitational field strength g N kg–1 density of liquid ρ kg m–3 vertical height h m volume of part of liquid V m3 Which expression has the units of energy? ρ hV ρ g ρ g2h A gρ hV B C D g hV Space for working

1 marks

Answer: A

This question in 9702/12 Oct/Nov 2009

1 The SI unit for potential difference (the volt) is given, in base units, by A kg m A–1 s–3. B m2 A–1 s–2. C kg m2 s–2. D kg m2 A–1 s–3.

1 marks

Answer: D

This question in 9702/11 May/June 2010

2 The product of pressure and volume has the same SI base units as A energy. B force. force . C area force . D length

1 marks

Answer: A

This question in 9702/11 May/June 2010

1 The product of pressure and volume has the same SI base units as A energy. B force. force . C area force . D length

1 marks

Answer: A

This question in 9702/13 May/June 2010

6 The SI unit for potential difference (the volt) is given, in base units, by A kg m A–1 s–3. B m2 A–1 s–2. C kg m2 s–2. D kg m2 A–1 s–3.

1 marks

Answer: D

This question in 9702/13 May/June 2010

1 Which row shows a base quantity with its correct SI unit? quantity unit A current A B mass g C temperature °C D weight N

1 marks

Answer: A

This question in 9702/12 Oct/Nov 2010

2 The frictional force F on a sphere falling through a fluid is given by the formula F = 6πaηv where a is the radius of the sphere, η is a constant relating to the fluid and v is the velocity of the sphere. What are the units of η ? A kg m s–1 B kg m–1 s–1 C kg m s–3 D kg m3 s–3

1 marks

Answer: B

This question in 9702/12 Oct/Nov 2010

7 A metal sphere of radius r is dropped into a tank of water. As it sinks at speed v, it experiences a drag force F given by F = kr v, where k is a constant. What are the SI base units of k ? A kg m2 s–1 B kg m–2 s–2 C kg m–1 s–1 D kg m s–2 Space for working

1 marks

Answer: C

This question in 9702/13 Oct/Nov 2010

1 Decimal sub-multiples and multiples of units are indicated using a prefix to the unit. For example, the prefix milli (m) represents 10–3. Which row gives the sub-multiples or multiples represented by pico (p) and giga (G)? pico (p) giga (G) A 10–9 109 B 10–9 1012 C 10–12 109 D 10–12 1012

1 marks

Answer: C

This question in 9702/11 May/June 2011

1 Stress has the same SI base units as force . A mass force . B length force . C area D energy.

1 marks

Answer: C

This question in 9702/12 May/June 2011

2 To check calculations, the units are put into the following equations together with the numbers. Which equation must be incorrect? A force = 300 J / 6 m B power = 6000 J × 20 s C time = 6 m / 30 m s–1 D velocity = 4 m s–2 × 30 s Space for working

1 marks

Answer: B

This question in 9702/12 May/June 2011

2 Decimal sub-multiples and multiples of units are indicated using a prefix to the unit. For example, the prefix milli (m) represents 10–3. Which row gives the sub-multiples or multiples represented by pico (p) and giga (G)? pico (p) giga (G) A 10–9 109 B 10–9 1012 C 10–12 109 D 10–12 1012

1 marks

Answer: C

This question in 9702/13 May/June 2011

1 Which statement using prefixes of the base unit metre (m) is not correct? A 1 pm = 10–12 m B 1 nm = 10–9 m C 1 Mm = 106 m D 1 Gm = 1012 m

1 marks

Answer: D

This question in 9702/11 Oct/Nov 2011

4 A cylindrical tube rolling down a slope of inclination θ moves a distance L in time T. The equation relating these quantities is  a2  L  3 + P  = QT 2 sin θ     Where a is the internal radius of the tube and P and Q are constants. Which line gives the correct units for P and Q? P Q A m2 m2 s–2 B m2 m s–2 C m2 m3 s–2 D m3 m s–2 Space for working

1 marks

Answer: B

This question in 9702/11 Oct/Nov 2011

18 What is the unit of power in SI base units? A kg m s–2 B kg m s–3 C kg m2 s–2 D kg m2 s–3

1 marks

Answer: D

This question in 9702/12 Oct/Nov 2011

2 Which statement using prefixes of the base unit metre (m) is not correct? A 1 pm = 10–12 m B 1 nm = 10–9 m C 1 Mm = 106 m D 1 Gm = 1012 m Space for working

1 marks

Answer: D

This question in 9702/13 Oct/Nov 2011

5 A cylindrical tube rolling down a slope of inclination θ moves a distance L in time T. The equation relating these quantities is  a2  L  3 + P  = QT 2 sin θ     Where a is the internal radius of the tube and P and Q are constants. Which line gives the correct units for P and Q? P Q A m2 m2 s–2 B m2 m s–2 C m2 m3 s–2 D m3 m s–2 Space for working

1 marks

Answer: B

This question in 9702/13 Oct/Nov 2011

1 What is the unit watt in terms of SI base units? A J s–1 B m2 kg s–1 C m2 kg s–3 D N m s–1

1 marks

Answer: C

This question in 9702/12 May/June 2012

1 What is the unit of weight in terms of SI base unit(s)? A kg m s–1 B kg m s–2 C N D J m–1

1 marks

Answer: B

This question in 9702/11 Oct/Nov 2012

8 The velocity of an electric car changes as shown. 150 velocity / km h–1 100 50 0 0 1 2 3 4 time / s What is the acceleration of the car? A 190 m s–2 B 53 m s–2 C 26 m s–2 D 7.3 m s–2

1 marks

Answer: D

This question in 9702/11 Oct/Nov 2012

1 Which quantity has the same base units as momentum? A density × energy B density × volume × velocity C pressure × area D weight ÷ area

1 marks

Answer: B

This question in 9702/12 Oct/Nov 2012

1 The units of all physical quantities can be expressed in terms of SI base units. Which pair contains quantities with the same base units? A force and momentum B pressure and Young modulus C power and kinetic energy D mass and weight

1 marks

Answer: B

This question in 9702/13 Oct/Nov 2012

2 One property Q of a material is used to describe the behaviour of sound waves in the material. Q is defined as the pressure P of the sound wave divided by the speed v of the wave and the surface area A of the material through which the wave travels: Q = vA P . What are the SI base units of Q? A kg m2 s–3 B kg m–3 s–1 C kg m–4 s–1 D kg m–2 s–2

1 marks

Answer: C

This question in 9702/11 May/June 2013

2 The unit of resistivity, expressed in terms of base units, is given by kg x3 y–2 z–3 . Which base units are x, y and z? x y z A ampere metre second B metre ampere second C metre second ampere D second ampere metre

1 marks

Answer: B

This question in 9702/12 May/June 2013

2 What is the unit of power, expressed in SI base units? A kg m2 s–3 B kg m s–3 C kg m s–2 D kg m2 s–1

1 marks

Answer: A

This question in 9702/13 May/June 2013

1 Which row shows an SI base quantity with its correct unit? SI base quantity unit A charge coulomb B current ampere C potential difference volt D temperature degree Celsius

1 marks

Answer: B

This question in 9702/11 Oct/Nov 2013

1 Which row shows an SI base quantity with its correct unit? SI base quantity unit A charge coulomb B current ampere C potential difference volt D temperature degree Celsius

1 marks

Answer: B

This question in 9702/12 Oct/Nov 2013

2 Which unit is equivalent to the coulomb? A ampere per second B joule per volt C watt per ampere D watt per volt

1 marks

Answer: B

This question in 9702/13 Oct/Nov 2013

4 The spring constant k of a coiled wire spring is given by the equation Gr 4 k = 4nR 3 where r is the radius of the wire, n is the number of turns of wire and R is the radius of each of the turns of wire. The quantity G depends on the material from which the wire is made. What is a suitable unit for G? A N m–2 B N m–1 C N m D N m2 Space for working

1 marks

Answer: A

This question in 9702/13 Oct/Nov 2013

1 Which pair of units contains one derived unit and one SI base unit? A ampere coulomb B kilogram kelvin C metre second D newton pascal

1 marks

Answer: A

This question in 9702/11 May/June 2014

2 What is equivalent to 2000 microvolts? A 2 µJ C–1 B 2 mV C 2 pV D 2000 mV

1 marks

Answer: B

This question in 9702/11 May/June 2014

1 The maximum theoretical power P of a wind turbine is given by the equation P = kρAv n where ρ is the density of air, A is the area swept by the turbine blades, v is the speed of the air and k is a constant with no units. What is the value of n ? A 1 B 2 C 3 D 4

1 marks

Answer: C

This question in 9702/12 May/June 2014

2 What is the unit of resistance when expressed in SI base units? A kg m2 s–2 A–1 B kg m2 s–3 A–2 C kg m s–2 A–1 D kg m s–3 A–1 Space for working

1 marks

Answer: B

This question in 9702/12 May/June 2014

2 The unit of specific heat capacity is J kg–1 K–1. What is its equivalent in terms of SI base units? A kg–1 m2 K–1 B m s–1 K–1 C m s–2 K–1 D m2 s–2 K–1

1 marks

Answer: D

This question in 9702/13 May/June 2014

6 A digital caliper is used to measure the 28.50 mm width of a plastic ruler. The digital caliper reads to the nearest 0.01 mm. What is the correct way to record this reading? A 0.02850 ± 0.01 m B 0.0285 ± 0.001 m C (2.850 ± 0.001) × 10–2 m D (2.850 ± 0.001) × 10–3 m

1 marks

Answer: C

This question in 9702/13 May/June 2014

2 What is equivalent to the unit of electric field strength? A J C m–1 B N s A–1 C kg m s–3 A–1 D kg m3 s–3 A–1

1 marks

Answer: C

This question in 9702/11 Oct/Nov 2014

3 The diagram shows the reading on an analogue ammeter. 5 10 milliamperes (mA) 0 15 Which digital ammeter reading is the same as the reading on the analogue ammeter? display units display reading A µA 1600 B µA 160 C mA 16.0 D A 1.60 Space for working

1 marks

Answer: A

This question in 9702/11 Oct/Nov 2014

2 What is equivalent to the unit of electric field strength? A J C m–1 B N s A–1 C kg m s–3 A–1 D kg m3 s–3 A–1

1 marks

Answer: C

This question in 9702/12 Oct/Nov 2014

3 The diagram shows the reading on an analogue ammeter. 5 10 milliamperes (mA) 0 15 Which digital ammeter reading is the same as the reading on the analogue ammeter? display units display reading A µA 1600 B µA 160 C mA 16.0 D A 1.60 Space for working

1 marks

Answer: A

This question in 9702/12 Oct/Nov 2014

1 When the brakes are applied on a vehicle moving at speed v, the distance d moved by the vehicle in coming to rest is given by the expression d = kv 2 where k is a constant. What is the unit of k expressed in SI base units? A m–1 s2 B m s–2 C m2 s–2 D m–1 s

1 marks

Answer: A

This question in 9702/13 Oct/Nov 2014

1 Which is an SI base unit? A current B gram C kelvin D volt

1 marks

Answer: C

This question in 9702/11 May/June 2015

3 When a constant braking force is applied to a vehicle moving at speed v, the distance d moved by the vehicle in coming to rest is given by the expression d = kv 2 where k is a constant. When d is measured in metres and v is measured in metres per second, the constant has a value of k1. What is the value of the constant when the distance is measured in metres, and the speed is measured in kilometres per hour? A 0.0772 k1 B 0.278 k1 C 3.60 k1 D 13.0 k1

1 marks

Answer: A

This question in 9702/11 May/June 2015

2 The average kinetic energy E of a gas molecule is given by the equation E = 2 3 kT where T is the absolute (kelvin) temperature. What are the SI base units of k ? A kg–1 m–1 s2 K B kg–1 m–2 s2 K C kg m s–2 K–1 D kg m2 s–2 K–1

1 marks

Answer: D

This question in 9702/12 May/June 2015

1 Which statement includes a correct unit? A energy = 7.8 N s B force = 3.8 N s C momentum = 6.2 N s D torque = 4.7 N s

1 marks

Answer: C

This question in 9702/13 May/June 2015

2 What is the joule (J) in SI base units? A kg m s–1 B kg m2 s–1 C kg m s–2 D kg m2 s–2

1 marks

Answer: D

This question in 9702/13 May/June 2015

1 What is the unit of weight in terms of SI base unit(s)? A kg m s–1 B kg m s–2 C N D J m–1

1 marks

Answer: B

This question in 9702/11 Oct/Nov 2015

2 At temperatures close to 0 K, the specific heat capacity c of a particular solid is given by c = bT 3, where T is the thermodynamic temperature and b is a constant characteristic of the solid. The SI unit of specific heat capacity is J kg–1 K–1. What is the unit of constant b, expressed in SI base units? A m2 s –2 K–3 B m2 s–2 K–4 C kg m2 s–2 K–3 D kg m2 s–2 K–4

1 marks

Answer: B

This question in 9702/11 Oct/Nov 2015

3 The time T taken for a satellite to orbit the Earth on a circular path is given by the equation kr 3 T 2 = M where r is the radius of the orbit, M is the mass of the Earth and k is a constant. What are the SI base units of k ? A kg–1 m–3 s2 B kg–1 m3 s2 C kg m–3 s2 D kg m3 s2

1 marks

Answer: C

This question in 9702/12 Oct/Nov 2015

1 What is the unit of the Young modulus when expressed in SI base units? A kg m–1 s–2 B kg m3 s–2 C kg m–2 D kg m–1 s–1

1 marks

Answer: A

This question in 9702/13 Oct/Nov 2015

2 The Reynolds number R is a constant used in the study of liquids flowing through pipes. R is a pure number with no unit. ρvD R = µ where ρ is the density of the liquid, v is the speed of the liquid and D is the diameter of the pipe through which the liquid flows. What are the SI base units of µ? A kg m s B kg m–1 s C kg m s–1 D kg m–1 s–1

1 marks

Answer: D

This question in 9702/13 Oct/Nov 2015

6 A cylindrical tube rolling down a slope of inclination θ moves a distance L in time T. The equation relating these quantities is  a2  L  3 + P  = QT 2 sin θ     where a is the internal radius of the tube and P and Q are constants. Which row gives the correct units for P and for Q? P Q A m2 m2 s–2 B m2 m s–2 C m2 m3 s–2 D m3 m s–2

1 marks

Answer: B

This question in 9702/13 Oct/Nov 2015

1 The prefixes nano (n), micro (µ) and pico (p) are often used with units. Which row shows their correct values? n µ p A 10–6 10–9 10–12 B 10–6 10–12 10–9 C 10–9 10–6 10–12 D 10–12 10–9 10–6

1 marks

Answer: C

This question in 9702/12 Feb/March 2016

3 The SI unit of specific heat capacity is J kg–1 K–1. What is the unit of specific heat capacity expressed in SI base units? A m s–2 K–1 B kg m s–1 K–1 C m2 s–2 K–1 D kg m2 s–1 K–1

1 marks

Answer: C

This question in 9702/12 Feb/March 2016

2 Which pair of quantities do not have the same SI base units? A electromotive force and electric potential difference B pressure and stress C spring constant and moment of a force D torque and work

1 marks

Answer: C

This question in 9702/11 May/June 2016

2 The luminosity L of a star is given by L = 4πr 2σT 4 where r is the radius of the star, T is the temperature of the star, σ is a constant with units W m–2 K–4. What are the SI base units of L ? A kg m2 s–1 B kg m2 s–2 C kg m2 s–3 D kg m2 s–4

1 marks

Answer: C

This question in 9702/12 May/June 2016

1 Which list contains only SI base units? A ampere, kelvin, joule, gram B kilogram, newton, metre, ampere C metre, coulomb, second, kelvin D second, kelvin, ampere, kilogram

1 marks

Answer: D

This question in 9702/13 May/June 2016

2 The stress σ needed to fracture a particular solid is given by the equation γ E σ = k d where E is the Young modulus, d is the distance between planes of atoms, and k is a constant with no units. What are the SI base units of γ ? A kg m s–2 B kg s–2 C kg m s–1 D kg s–1

1 marks

Answer: B

This question in 9702/13 May/June 2016

2 The force F between two point charges q1 and q2, a distance r apart, is given by the equation kq q F = 1 2 r 2 where k is a constant. What are the SI base units of k ? A kg m3 s–4 A2 B kg m3 s–4 A–2 C kg m3 A2 D kg m3 A–2

1 marks

Answer: B

This question in 9702/11 Oct/Nov 2016

2 The force F between two point charges q1 and q2, a distance r apart, is given by the equation kq q F = 1 2 r 2 where k is a constant. What are the SI base units of k ? A kg m3 s–4 A2 B kg m3 s–4 A–2 C kg m3 A2 D kg m3 A–2

1 marks

Answer: B

This question in 9702/13 Oct/Nov 2016

1 Which expression has the same SI base units as pressure? force A length × speed force B length × time mass C length × ( time )2 mass × ( time ) 2 D length

1 marks

Answer: C

This question in 9702/12 Feb/March 2017

3 What correctly expresses the volt in terms of SI base units? A A Ω B W A–1 C kg m2 s–1 A–1 D kg m2 s–3 A–1

1 marks

Answer: D

This question in 9702/12 May/June 2017

13 What are the SI base units of the quantity density A s–2 B kg2 s–2 C kg2 m2 s–2 D m2 s–2

1 marks

Answer: D

This question in 9702/12 May/June 2017

3 Which expression using SI base units is equivalent to the volt? A kg m2 s–1 A–1 B kg m s–2 A C kg m2 s–1 A D kg m2 s–3 A–1

1 marks

Answer: D

This question in 9702/13 May/June 2017

1 Which SI unit, expressed in base units, is not correct? A unit of force, kg m s–2 B unit of momentum, kg m s–1 C unit of pressure, kg m–2 s–2 D unit of work, kg m2 s–2

1 marks

Answer: C

This question in 9702/11 Oct/Nov 2017

1 Which pair of units are not the same when expressed in SI base units? A m s–2 and N kg–1 B N s and kg m s–1 C Pa and N m–2 D V m–2 and N C–1

1 marks

Answer: D

This question in 9702/12 Oct/Nov 2017

3 The units of specific heat capacity are J kg–1 K–1. What are the SI base units of specific heat capacity? A m s–2 K–1 B m s–1 K–1 C m2 s–2 K–1 D m2 s–1 K–1

1 marks

Answer: C

This question in 9702/12 Oct/Nov 2017

1 Which unit is equivalent to the coulomb? A ampere per second B joule per volt C watt per ampere D watt per volt

1 marks

Answer: B

This question in 9702/12 Feb/March 2018

2 Which row shows a quantity and an incorrect unit? quantity unit A efficiency no unit B moment of force N m–1 C momentum N s D work done J

1 marks

Answer: B

This question in 9702/12 Feb/March 2018

1 What is a unit for stress? A kg m–1 s–2 B kg m–2 s–2 C N m–1 D N m

1 marks

Answer: A

This question in 9702/11 May/June 2018

2 The drag coefficient Cd is a number with no units. It is used to compare the drag on different cars at different speeds. Cd is given by the equation 2 F Cd = v nρ A where F is the drag force on the car, ρ is the density of the air, A is the cross-sectional area of the car and v is the speed of the car. What is the value of n? A 1 B 2 C 3 D 4

1 marks

Answer: B

This question in 9702/12 May/June 2018

2 When a beam of light is incident on a surface, it delivers energy to the surface. The intensity of the beam is defined as the energy delivered per unit area per unit time. What is the unit of intensity, expressed in SI base units? A kg m–2 s–1 B kg m2 s–3 C kg s–2 D kg s–3

1 marks

Answer: D

This question in 9702/11 Oct/Nov 2018

2 What is the unit of resistance when expressed in SI base units? A kg m2 s–2 A–1 B kg m2 s–3 A–2 C kg m s–2 A–1 D kg m s–3 A–1

1 marks

Answer: B

This question in 9702/12 Oct/Nov 2018

2 Three of these quantities have the same unit. Which quantity has a different unit? energy A distance B force C power × time D rate of change of momentum

1 marks

Answer: C

This question in 9702/13 Oct/Nov 2018

2 At temperatures close to 0 K, the specific heat capacity c of a particular solid is given by c = bT 3, where T is the temperature and b is a constant, characteristic of the solid. The SI unit of specific heat capacity is J kg–1 K–1. What is the unit of constant b, expressed in SI base units? A m2 s–2 K–3 B m2 s–2 K–4 C kg m2 s–2 K–3 D kg m2 s–2 K–4

1 marks

Answer: B

This question in 9702/12 Feb/March 2019

1 Which unit can be expressed in base units as kg m2 s–2? A joule B newton C pascal D watt

1 marks

Answer: A

This question in 9702/11 May/June 2019

2 The luminosity L of a star is given by L = 4πr 2σT 4 where r is the radius of the star, T is the temperature of the star and σ is a constant with units W m–2 K–4. What are the SI base units of L ? A kg m2 s–1 B kg m2 s–2 C kg m2 s–3 D kg m2 s–4

1 marks

Answer: C

This question in 9702/11 May/June 2019

1 What is equivalent to 2000 microvolts? A 2 µJ C–1 B 2 mV C 2 pV D 2000 mV

1 marks

Answer: B

This question in 9702/12 May/June 2019

2 What is the number of SI base units required to express electric field strength and power? electric field power strength A 3 3 B 3 2 C 4 2 D 4 3

1 marks

Answer: D

This question in 9702/12 May/June 2019

3 The Planck constant h has SI units J s. Which equation could be used to calculate the Planck constant? D E A h = where D is distance, E is energy and v is velocity v v B h = where v is velocity and D is distance D 1 C h = where E is electric field strength 4 π E Fr 2 D h = where F is force, r is radius and m is mass m

1 marks

Answer: A

This question in 9702/12 May/June 2019

1 Which is an SI base unit? A current B gram C kelvin D volt

1 marks

Answer: C

This question in 9702/13 May/June 2019

2 Osmium, a naturally occurring element, has a density of 23 000 kg m–3. What is also a value of the density of osmium? A 2.3 × 104 µg cm–3 B 2.3 × 104 g cm–3 C 2.3 kg cm–3 D 2.3 × 10–2 kg cm–3

1 marks

Answer: D

This question in 9702/13 May/June 2019

5 The diagram shows the reading on an analogue ammeter. 5 10 milliamperes (mA) 0 15 Which digital ammeter reading is the same as the reading on the analogue ammeter? display units display reading A µA 1600 B µA 160 C mA 16.0 D A 1.60

1 marks

Answer: A

This question in 9702/13 May/June 2019

2 The speed of a wave in deep water depends on its wavelength L and the acceleration of free fall g. What is a possible equation for the speed v of the wave?  gL  gL  g  2 π g A v =   B v = C v = 2 π   D v =  2 π  4π 2  L  L

1 marks

Answer: A

This question in 9702/11 Oct/Nov 2019

2 Which expression gives an SI base quantity? A charge per unit time B force per unit area C mass per unit volume D work done per unit distance

1 marks

Answer: A

This question in 9702/12 Oct/Nov 2019

4 A micrometer is used to measure the 28.50 mm width of a plastic ruler. The micrometer reads to the nearest 0.01 mm. What is the correct way to record this reading? A 0.02850 ± 0.01 m B 0.0285 ± 0.001 m C (2.850 ± 0.001) × 10–2 m D (2.850 ± 0.001) × 10–3 m

1 marks

Answer: C

This question in 9702/12 Oct/Nov 2019

1 Which quantity with its unit is correct? A acceleration of a bicycle = 1.4 m s–1 B electric current in a lamp = 0.25 A s–1 C electric potential difference across a battery = 8.0 J C–1 D kinetic energy of a car = 4500 N m–1

1 marks

Answer: C

This question in 9702/13 Oct/Nov 2019

2 Which two units are not equivalent to each other? A N m and kg m2 s–2 B N s and kg m s–1 C J s–1 and kg m2 s–3 D Pa and kg m s–2

1 marks

Answer: D

This question in 9702/13 Oct/Nov 2019

2 A byte (b) comprises 8 bits. How many bits are there in 1 terabyte (1Tb)? A 1 × 109 B 8 × 109 C 1 × 1012 D 8 × 1012

1 marks

Answer: D

This question in 9702/12 Feb/March 2020

2 The frequency f of vibration of a mass m supported by a spring with spring constant k is given by the equation f = Cm pk q where C is a constant with no units. What are the values of p and q? p q A – 1 2 – 1 2 B – 1 2 2 1 C 2 1 – 1 2 D 2 1 2 1

1 marks

Answer: B

This question in 9702/11 May/June 2020

2 A sample of gas has a mass of 4.8 µg and occupies a volume of 1.2 dm3. What is the density of the sample of gas? A 4.0 × 10–3 kg m–3 B 4.0 × 10–5 kg m–3 C 4.0 × 10–6 kg m–3 D 4.0 × 10–8 kg m–3

1 marks

Answer: C

This question in 9702/13 May/June 2020

2 Which time interval is the shortest? A 0.05 ms B 50 ns C 500 000 ps D 0.5 s

1 marks

Answer: B

This question in 9702/11 Oct/Nov 2020

2 The speed v of waves on a stretched wire is given by the equation v = T pq where T is the tension in the wire and  is the mass per unit length of the wire. What are the values of p and q? p q  1  1 A 2 2  1 1 B 2 2 1  1 C 2 2 1 1 D 2 2

1 marks

Answer: C

This question in 9702/12 Oct/Nov 2020

22 The speed v of waves in deep water is given by the equation g  v 2 = 2  where  is the wavelength of the waves and g is the acceleration of free fall. A student measures the wavelength  and the frequency f of a number of these waves. Which graph should he plot to give a straight line through the origin? A f 2 against  B f against 2 C f against  1 D f 2 against  1

1 marks

Answer: D

This question in 9702/12 Oct/Nov 2020

2 What is not an SI base unit? A coulomb B kelvin C kilogram D second

1 marks

Answer: A

This question in 9702/13 Oct/Nov 2020

2 Which physical quantity could have units of N s2 m–1? A acceleration B force C mass D momentum

1 marks

Answer: C

This question in 9702/12 Feb/March 2021

2 Which combination of units could be used for expressing the power dissipated in a resistor? A newton per second (N s–1) B newton second (N s) C newton metre (N m) D newton metre per second (N m s–1)

1 marks

Answer: D

This question in 9702/11 May/June 2021

2 What is a unit of momentum? A kg m s–2 B N s–1 C N s D kg s m–1

1 marks

Answer: C

This question in 9702/13 May/June 2021

2 The mobility  of electrons travelling through a metal conductor can be calculated using the equation  e   =     m  where e is the charge on an electron and m is its mass. The average time between the collisions of an electron with the atoms in the metal is . What are the SI base units of  ? A A kg–1 B A s2 kg–1 C A s kg–1 D A s–2 kg–1

1 marks

Answer: B

This question in 9702/11 Oct/Nov 2021

2 What is the unit of resistance when expressed in SI base units? A kg–1 m–2 s A2 B kg–1 m–2 s3 A2 C kg m2 s–1 A–2 D kg m2 s–3 A–2

1 marks

Answer: D

This question in 9702/13 Oct/Nov 2021

1 What could not be a measurement of a physical quantity? A 10 K B 11 J N–1 m–1 C 17 Pa m3 N–1 D 25 T m

1 marks

Answer: B

This question in 9702/12 Feb/March 2022

2 A computer memory stick is labelled as having a storage capacity of 128 GB. The letter B stands for byte, which is a unit. What is the equivalent storage capacity? A 1.28  108 B B 1.28  1011 B C 1.28  1014 B D 1.28  1017 B

1 marks

Answer: B

This question in 9702/12 Feb/March 2022

2 Which two units are identical when expressed in terms of SI base units? A J C–1 and kg m2 A–1 s–2 B J s and kg m2 s–1 C N m and kg m3 s–2 D N s and kg m s–3

1 marks

Answer: B

This question in 9702/11 May/June 2022

2 What is the symbol for the SI base unit of temperature? A C B K C C D K

1 marks

Answer: B

This question in 9702/12 May/June 2022

1 What is needed to accurately represent all physical quantities? A a base unit and a number B a unit and a number expressed in standard form (scientific notation) C a unit and a numerical magnitude D an SI unit and a numerical magnitude

1 marks

Answer: C

This question in 9702/11 Oct/Nov 2022

2 What is a power of 3.7 MW when expressed in kilowatts? A 3.7  10–3 kW B 3.7  10–3 KW C 3.7  103 kW D 3.7  103 KW

1 marks

Answer: C

This question in 9702/12 Oct/Nov 2022

2 What are the SI base units of electromotive force (e.m.f.)? A kg m2 s–1 A–1 B kg m2 s–3 A–1 C kg m2 s–1 A D kg m s–3 A–1

1 marks

Answer: B

This question in 9702/13 Oct/Nov 2022

2 The relationship between the variables D and T is given by the equation 1 = b + c T D where b and c are constants. The unit of D is m2 and the unit of T is s. What are the units of b and c? unit of b unit of c A m s s B m s–1 s–1 C m–1 s s D m–1 s–1 s–1

1 marks

Answer: B

This question in 9702/12 Feb/March 2023

1 Which unit is not an SI base unit? A A B kg C C D s

1 marks

Answer: C

This question in 9702/11 May/June 2023

2 Gm, Tm, m and pm are all units of length. Which unit is the largest and which unit is the smallest? largest smallest unit unit A Gm m B Gm pm C Tm m D Tm pm

1 marks

Answer: D

This question in 9702/12 May/June 2023

2 What is the ohm expressed in SI base units? A kg m2 s–3 A–2 B kg–1 m–2 s3 A2 C J C–1 A–1 D W A–2

1 marks

Answer: A

This question in 9702/13 May/June 2023

2 Which quantity is an SI base quantity? A force B newton C second D time

1 marks

Answer: D

This question in 9702/12 Oct/Nov 2023

1 Which row shows a physical quantity and its base unit in the SI system? quantity unit A current A B force N C mass g D temperature C

1 marks

Answer: A

This question in 9702/12 Feb/March 2024

1 Which unit is an SI base unit? A ampere B coulomb C degree Celsius D gram

1 marks

Answer: A

This question in 9702/11 May/June 2024

8 An aircraft flies from London to Sydney in a time of 21 hours 40 minutes. The distance travelled is 17 000 km. What is the average speed of the aircraft? A 2.2 m s–1 B 2.2  107 m s–1 C 2.2  1011 nm s–1 D 2.2  106 mm s–1

1 marks

Answer: C

This question in 9702/11 May/June 2024

1 What is equal to 0.000005 J? A 5 mJ B 5 MJ C 5 J D 5 nJ

1 marks

Answer: C

This question in 9702/13 May/June 2024

1 What are the SI base units for the moment of a force? A kg m–1 s2 B kg s–2 C kg m s–2 D kg m2 s–2

1 marks

Answer: D

This question in 9702/11 Oct/Nov 2024

1 A physical quantity consists of a magnitude and a unit. Which row does not show a correct combination of a quantity and its unit? quantity unit A mass gram B length metre C charge ampere D temperature kelvin

1 marks

Answer: C

This question in 9702/12 Oct/Nov 2024

3 The power output P of a star can be modelled with the equation P = AT 4 where  is a constant, A is the surface area of the star and T is the surface temperature of the star. What are the SI base units of ? A kg s–2 K–4 B kg s–3 K–4 C kg m–1 s–2 K–4 D kg m–1 s–3 K–4

1 marks

Answer: B

This question in 9702/13 Oct/Nov 2024

6 A surveyor’s device emits a pulse of light. The light is reflected from a wall 150 m away. What is the total time taken for the pulse to travel from the device to the wall and then back to the device? A 0.05 ns B 0.10 ns C 0.50 s D 1.0 s

1 marks

Answer: D

This question in 9702/11 May/June 2025

2 What is 0.25 kN mm–2 expressed in N m–2? A 0.00025 N m–2 B 0.25 N m–2 C 250 000 N m–2 D 250 000 000 N m–2

1 marks

Answer: D

This question in 9702/12 May/June 2025

4 A sample of material has cross-sectional area A and length L. The temperatures at the two sides of the sample are T1 and T2. Thermal energy Q is transferred through the sample in time t. These quantities are related by Q = k  A  ( T 1 – T ) 2 t L where k is a constant. What are the SI base units of k ? A kg m s–3 °C–1 B kg m s–3 K–1 C kg m s–1 °C–1 D kg m s–1 K–1

1 marks

Answer: B

This question in 9702/13 May/June 2025

2 Which unit is not equivalent to a unit of energy? A N m B V C C W s D kg m s–2

1 marks

Answer: D

This question in 9702/14 May/June 2025

3 What are the SI base units of the watt? A J s–1 B kg m2 s–3 C kg m2 s–1 D N m s–1

1 marks

Answer: B

This question in 9702/11 Oct/Nov 2025

22 What are the SI base units of stress? A kg m s–2 B kg m–1 s–2 C kg m–2 s–2 D kg m–3 s–2

1 marks

Answer: B

This question in 9702/11 Oct/Nov 2025

3 Which physical quantity could have units of N s2 m–1? A acceleration B force C mass D momentum

1 marks

Answer: C

This question in 9702/12 Oct/Nov 2025

3 What are the SI base units of the watt? A J s–1 B kg m2 s–3 C kg m2 s–1 D N m s–1

1 marks

Answer: B

This question in 9702/13 Oct/Nov 2025

22 What are the SI base units of stress? A kg m s–2 B kg m–1 s–2 C kg m–2 s–2 D kg m–3 s–2

1 marks

Answer: B

This question in 9702/13 Oct/Nov 2025

1 What is essential to accurately represent all physical quantities? A a base unit and a number B a unit and a number expressed in standard form (scientific notation) C a unit and a numerical magnitude D an SI unit and a numerical magnitude

1 marks

Answer: C

This question in 9702/14 Oct/Nov 2025