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- 1. Multiple Choice
Which list puts the forces in order of increasing magnitude?
2 pN < 2 fN < 2 TN < 2 GN
2 pN < 2 fN < 2 GN < 2 TN
2 fN < 2 pN < 2 TN < 2 GN
2 fN < 2 pN < 2 GN < 2 TN
- 2. Multiple Choice
1.0 kilowatt-hour (kW h) is equivalent to
6.3 × 1018 eV
6.3 × 1021 eV
2.3 × 1022 eV
2.3 × 1025 eV
- 3. Multiple Choice
Which is equivalent to the ohm?
J C–2 s–1
J C–2 s
J s
J s–1
- 4. Multiple Choice
What is a correct unit for the area under a force−time graph?
N m
kg m s–1
kg m s–2
N s–1
- 5. Multiple Choice
Two gamma photons are produced when a muon and an antimuon annihilate each other. What is the minimum frequency of the gamma radiation that could be produced?
2.55 × 1016 Hz
5.10 × 1016 Hz
2.55 × 1022 Hz
5.10 × 1022 Hz
- 6. Multiple Choice
The diagram shows an energy-level diagram for a hydrogen atom. Electrons, each having a kinetic energy of 2.0 × 10–18 J, collide with atoms of hydrogen in their ground state. Photons are emitted when the atoms de-excite. How many different wavelengths can be observed with incident electrons of this energy?
1
3
6
7
- 7. Multiple Choice
Photons of wavelength 290 nm are incident on a metal plate. The work function of the metal is 4.1 eV
What is the maximum kinetic energy of the emitted electrons?
0.19 eV
4.3 eV
6.9 eV
8.4 eV
- 8. Multiple Choice
A diffraction grating has 500 lines per mm. When monochromatic light is incident normally on the grating the third-order spectral line is formed at an angle of 60° from the normal to the grating.
What is the wavelength of the monochromatic light?
220 nm
580 nm
960 nm
1700 nm
- 9. Multiple Choice
A mobile phone operates at a constant power of 200 mW.
It has a 3.7 V lithium-ion battery that has a charge capacity of 9400 C
What is the time taken for the battery to discharge completely?
2 hours
48 hours
120 hours
140 hours
- 10. Multiple Choice
An object of mass 0.15 kg performs simple harmonic motion. It oscillates with amplitude 55 mm and frequency 0.80 Hz
What is the maximum value of its kinetic energy?
5.7 × 10–3 J
11 × 10–3 J
0.57 J
11 J
- 11. Multiple Choice
A spacecraft of mass 1.0 × 106 kg is in orbit around the Sun at a radius of 1.1 × 1011 m
The spacecraft moves into a new orbit of radius 2.5 × 1011 m around the Sun.
What is the total change in gravitational potential energy of the spacecraft?
–6.76 × 1014 J
–3.38 × 1014 J
3.38 × 1014 J
6.76 × 1014 J
- 12. Multiple Choice
The radius of a uranium 23892U nucleus is 7.75 × 10–15 m
What is the radius of a 126C nucleus?
1.10 × 10–18 m
3.91 × 10–16 m
2.86 × 10–15 m
3.12 × 10–15 m
- 13. Multiple Choice
During a single fission event of uranium-235 in a nuclear reactor the total mass lost is 0.23 u. The reactor is 25% efficient.
How many events per second are required to generate 900 MW of power?
1.1 × 1014
6.6 × 1018
1.1 × 1020
4.4 × 1020
- 14. Multiple Choice
What cannot be used as a unit for the Young modulus?
N m–2
Pa
kg m–2 s–2
kg m–1 s–2
- 15. Multiple Choice
The units of physical quantities can be expressed in terms of the fundamental (base) units of the SI system. In which line in the table are the fundamental units correctly matched to the physical quantity?
A
B
C
D
- 16. Multiple Choice
In which of the following do both quantities have the same unit?
Electrical resistivity and electrical resistance.
Work function and Planck constant
Pressure and the Young modulus.
Acceleration and rate of change of momentum.
- 17. Multiple Choice
Which of the following is not a unit of power?
N m s–1
kg m2 s–3
J s–1
kg m–1 s–1
- 18. Multiple Choice
Which of the following gives a correct unit for
N
N kg–1
N m
N m–2
- 19. Multiple Choice
Which of the following is not a unit of power?
N m s−1
J s
W
kg m2 s−3
- 20. Multiple Choice
The gravitational constant, G, is a constant of proportionality in Newton’s law of gravitation. The permittivity of free space, ε0, is a constant of proportionality in Coulomb’s law.
When comparing the electrostatic force acting on a pair of charged particles to the gravitational force between them, the product ε0G can appear in the calculation.
Which is a unit for ε0G?
C2 kg–2
C2 m–2
F kg2 N–1 m–2
it has no unit
- 21. Multiple Choice
Which one of the following is a possible unit of impulse?
Ns–1
kg ms–1
kg ms–2
sN–1
- 22. Multiple Choice
Which one of the following cannot be used as a unit for electric field strength?
J m–1 C–1
J A–1 s–1m–1
N A–1 s–1
J C m–1
- 23. Multiple Choice
Which of the following is a possible unit for rate of change of momentum?
N s
N s–1
kg ms–1
kg ms–2
- 24. Multiple Choice
Which one of the following could be a unit of gravitational potential?
N
J
N kg–1
J kg–1
- 25. Multiple Choice
The resistance of a negative temperature coefficient (ntc) thermistor
increases as temperature increases.
is constant at temperatures below 0 °C.
increases as temperature decreases.
falls to zero when a critical temperature is reached.
- 26. Multiple Choice
The unit of potential difference can be expressed as
C s–1
J C–1
V A–1
J A–1
- 27. Multiple Choice
The fission of one nucleus of uranium 235 releases 200 MeV of energy. What is the value of this energy in J?
3.2 × 10−25 J
3.2 × 10−17 J
3.2 × 10−11 J
2.0 × 106 J
- 28. Multiple Choice
Which line, A to D, gives correct units for both magnetic flux and magnetic flux density?A
A
B
C
D
- 29. Multiple Choice
Measurements are made to determine the tension, length and mass per unit length of a string stretched between two supports. The percentage uncertainties in these measurements are shown below.
A stationary wave is formed on the string.
What is the percentage uncertainty in the calculated value of the frequency of the first harmonic?
1.8%
3.8%
6.8%
13%
- 30. Multiple Choice
A student carries out an experiment to determine the resistivity of a metal wire.She determines the resistance from measurements of potential difference between the ends of the wire and the corresponding current. She measures the length of the wire with a ruler and the diameter of the wire using a micrometer. Each measurement is made with an uncertainty of 1%
Which measurement gives the largest uncertainty in the calculated value of the resistivity?
current
diameter
length
potential difference
- 31. Multiple Choice
Which dartboard contains a grouping of darts which are neither mathematically accurate nor precise?
A
B
C
D
- 32. Multiple Choice
Which dartboard contains a grouping of darts which are mathematically accurate, but not precise?
A
B
C
D
- 33. Multiple Choice
Which dartboard contains a grouping of darts which are mathematically precise, but not accurate?
A
B
C
D
- 34. Multiple Choice
Which dartboard contains a grouping of darts which are both mathematically precise, AND accurate?
A
B
C
D
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