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1

Which pair of units contains one derived unit and one SI base unit?

1. Physical quantities and units  →  1.2. SI units

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2

What is equivalent to 2000 microvolts?

15. Ideal gases  →  15.3. Kinetic theory of gases

22. Quantum physics  →  22.1. Energy and momentum of a photon

9. Electricity  →  9.2. Potential difference and power

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3

The speed v of a liquid leaving a tube depends on the change in pressure ∆P and the density ρ of the liquid. The speed is given by the equation v = n P k      ∆ ρ where k is a constant that has no units. What is the value of n ?

4. Forces, density and pressure  →  4.3. Density and pressure

15. Ideal gases  →  15.2. Equation of state

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4

An experiment is carried out to measure the resistance of a wire. The current in the wire is (1.0 ± 0.2) A and the potential difference across the wire is (8.0 ± 0.4) V. What is the resistance of the wire and its uncertainty?

9. Electricity  →  9.3. Resistance and resistivity

6. Deformation of solids  →  6.1. Stress and strain

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5

The Young modulus of the material of a wire is to be found. The Young modulus E is given by the equation below. x d F E π = l The wire is extended by a known force and the following measurements are made. Which measurement has the largest effect on the uncertainty in the value of the calculated Young modulus?

6. Deformation of solids  →  6.1. Stress and strain

1. Physical quantities and units  →  1.3. Errors and uncertainties

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6

A tennis ball is thrown horizontally in air from the top of a tall building. If the effect of air resistance is not negligible, what happens to the horizontal and vertical components of the ball’s velocity?

3. Dynamics  →  3.2. Non-uniform motion

2. Kinematics  →  2.1. Equations of motion

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7

An object is thrown with velocity 5.2 m s–1 vertically upwards on the Moon. The acceleration due to gravity on the Moon is 1.62 m s–2. What is the time taken for the object to return to its starting point?

2. Kinematics  →  2.1. Equations of motion

3. Dynamics  →  3.1. Momentum and Newton’s laws of motion

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8

The graph shows how the acceleration of an object moving in a straight line varies with time. acceleration time The object starts from rest. Which graph shows the variation with time of the velocity of the object over the same time interval?

2. Kinematics  →  2.1. Equations of motion

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9

An object of mass 4.0 kg moving with a speed of 3.0 m s–1 strikes a stationary object in an inelastic collision. Which statement is correct?

3. Dynamics  →  3.3. Linear momentum and its conservation

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10

The graph shows how the momentum of a motorcycle changes with time. time / s momentum / kg m s–1 What is the resultant force on the motorcycle?

3. Dynamics  →  3.1. Momentum and Newton’s laws of motion

3. Dynamics  →  3.3. Linear momentum and its conservation

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11

The diagrams show two ways of hanging the same picture. T1 T1 R1 diagram 1 T2 T2 R2 diagram 2 nail nail In both cases, a string is attached to the same points on the picture and looped symmetrically over a nail in a wall. The forces shown...

6. Deformation of solids  →  6.1. Stress and strain

6. Deformation of solids  →  6.2. Elastic and plastic behaviour

4. Forces, density and pressure  →  4.2. Equilibrium of forces

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12

A man holds a 100 N load stationary in his hand. The combined weight of the forearm and hand is 20 N. The forearm is held horizontal, as shown...

6. Deformation of solids  →  6.1. Stress and strain

6. Deformation of solids  →  6.2. Elastic and plastic behaviour

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13

A spindle is attached at one end to the centre of a lever of length 1.20 m and at its other end to the centre of a disc of radius 0.20 m. A string is wrapped round the disc, passes over a pulley and is attached to a 900 N weight. F F 900 N string pulley disc spindle lever 0.20 m 1.20 m What is the minimum force F, applied to each end of the lever, that could lift the weight?

4. Forces, density and pressure  →  4.1. Turning effects of forces

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14

What is the average power output of a laser that can deliver 0.20 J of energy in 10 ns?

22. Quantum physics  →  22.2. Photoelectric effect

24. Medical physics  →  24.2. Production and use of X-rays

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15

A weight W hangs from a trolley that runs along a rail. The trolley moves horizontally through a distance p and simultaneously raises the weight through a height q. rail trolley weight W X Y q p r As a result, the weight moves through a distance r from X to Y. It starts and finishes at rest. How much work is done on the weight during this process?

5. Work, energy and power  →  5.1. Energy conservation

3. Dynamics  →  3.1. Momentum and Newton’s laws of motion

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16

The engine of a car exerts a force of 600 N in moving the car 1.0 km in 150 seconds. What is the average output power of the engine?

5. Work, energy and power  →  5.1. Energy conservation

9. Electricity  →  9.2. Potential difference and power

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17

Which statement about boiling and evaporation is correct?

14. Temperature  →  14.2. Temperature scales

14. Temperature  →  14.1. Thermal equilibrium

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18

There is one temperature, about 0.01 °C, at which water, water vapour and ice can co-exist in equilibrium. Which statement about the properties of the molecules at this temperature is correct?

14. Temperature  →  14.2. Temperature scales

14. Temperature  →  14.1. Thermal equilibrium

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19

A crystalline solid is heated at a constant rate and the change of temperature with time is shown...

14. Temperature  →  14.1. Thermal equilibrium

14. Temperature  →  14.2. Temperature scales

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20

The stress-strain graphs for three different materials are shown...

6. Deformation of solids  →  6.1. Stress and strain

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21

The graph is a load-extension graph for a wire undergoing elastic deformation. load / kg extension / mm How much work is done on the wire to increase the extension from 10 mm to 20 mm?

6. Deformation of solids  →  6.2. Elastic and plastic behaviour

6. Deformation of solids  →  6.1. Stress and strain

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22

Which statement about longitudinal waves is correct?

7. Waves  →  7.2. Transverse and longitudinal waves

7. Waves  →  7.1. Progressive waves

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23

The order of magnitude of the frequency of the longest-wavelength ultraviolet waves can be expressed as 10x Hz. What is the value of x?

7. Waves  →  7.1. Progressive waves

24. Medical physics  →  24.2. Production and use of X-rays

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24

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

7. Waves  →  7.2. Transverse and longitudinal waves

7. Waves  →  7.1. Progressive waves

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25

A stationary wave on a stretched string is set up between two points P and T. P Q R S T vibrator Which statement about the wave is correct?

8. Superposition  →  8.1. Stationary waves

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26

A parallel beam of white light passes through a diffraction grating. Orange light of wavelength 600 nm in the fourth order diffraction maximum coincides with blue light in the fifth order diffraction maximum. What is the wavelength of the blue light?

8. Superposition  →  8.4. The diffraction grating

8. Superposition  →  8.2. Diffraction

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27

The basic principle of note production in a horn is to set up a stationary wave in an air column. mouthpiece bell horn For any note produced by the horn, a node is formed at the mouthpiece and an antinode is formed at the bell. The frequency of the lowest note is 75 Hz. What are the frequencies of the next two higher notes for this air column?

7. Waves  →  7.1. Progressive waves

8. Superposition  →  8.1. Stationary waves

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28

A horizontal beam of electrons is passed between two horizontal parallel plates, 2.0 cm apart, as shown...

18. Electric fields  →  18.2. Uniform electric fields

20. Magnetic fields  →  20.3. Force on a moving charge

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29

The diagram shows two points P and Q which lie 90° apart on a circle of radius r. A positive point charge at the centre of the circle creates an electric field of magnitude E at both P and Q. P Q r + Which expression gives the work done in moving a unit positive charge from P to Q?

18. Electric fields  →  18.5. Electric potential

18. Electric fields  →  18.4. Electric field of a point charge

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30

Two electrically-conducting cylinders X and Y are made from the same material. Their dimensions are as shown...

9. Electricity  →  9.3. Resistance and resistivity

10. D.C. circuits  →  10.2. Kirchhoff’s laws

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31

A battery, with a constant internal resistance, is connected to a resistor of resistance 250 Ω, as shown...

10. D.C. circuits  →  10.1. Practical circuits

5. Work, energy and power  →  5.1. Energy conservation

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32

Which symbol represents a component whose resistance is designed to change with temperature?

9. Electricity  →  9.3. Resistance and resistivity

14. Temperature  →  14.2. Temperature scales

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33

In the circuit below, a voltmeter of resistance RV and an ammeter of resistance RA are used to measure the resistance R of the fixed resistor. A R V + – Which condition is necessary for an accurate value to be obtained for R?

9. Electricity  →  9.3. Resistance and resistivity

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34

In the circuit shown...

10. D.C. circuits  →  10.3. Potential dividers

9. Electricity  →  9.3. Resistance and resistivity

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35

The potential difference across a component in a circuit is 2.0 V. How many electrons must flow through this component in order for it to be supplied with 4.8 J of energy?

9. Electricity  →  9.2. Potential difference and power

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36

What is the total resistance between points P and Q in this network of resistors?

10. D.C. circuits  →  10.2. Kirchhoff’s laws

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37

Alpha, beta and gamma radiations have various depths of penetration in matter and different charges. Which row best summarises the penetration and charge of each radiation?

11. Particle physics  →  11.1. Atoms, nuclei and radiation

24. Medical physics  →  24.3. PET scanning

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38

In 2002, two-proton radioactive decay of an isotope of iron, Fe, was observed. What could be the resulting product?

11. Particle physics  →  11.1. Atoms, nuclei and radiation

23. Nuclear physics  →  23.2. Radioactive decay

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39

U++ is a doubly-ionised uranium atom. The uranium atom has a nucleon number of 235 and a proton number of 92. In a simple model of the atom, how many particles are in this ionised atom?

11. Particle physics  →  11.1. Atoms, nuclei and radiation

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40

The grid shows a number of nuclides arranged according to the number of protons and the number of neutrons in each. A nucleus of the nuclide Li decays by emitting a β-particle. What is the resulting nuclide?

11. Particle physics  →  11.1. Atoms, nuclei and radiation

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