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WorksheetsP.3.1.1 Use of SI Units; prefixes
Total questions: 28
Worksheet time: 14mins
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
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
Which is equivalent to the ohm?
J C–2 s–1
J C–2 s
J s
J s–1
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
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
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
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
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
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
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
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
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
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
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
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
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.
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
Which of the following gives a correct unit for
N
N kg–1
N m
N m–2
Which of the following is not a unit of power?
N m s−1
J s
W
kg m2 s−3
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
Which one of the following is a possible unit of impulse?
Ns–1
kg ms–1
kg ms–2
sN–1
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
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
Which one of the following could be a unit of gravitational potential?
N
J
N kg–1
J kg–1
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.
The unit of potential difference can be expressed as
C s–1
J C–1
V A–1
J A–1
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
Which line, A to D, gives correct units for both magnetic flux and magnetic flux density?A
A
B
C
D
