INTERNATIONAL A-LEVEL
PHYSICS
(9630)
PAPER 2
Specimen 2018 Morning Time allowed: 2 hours
Materials
For this paper you must have:
• a pencil
• a ruler
• a calculator
• a data and formula booklet.
Instructions
• use black ink or ball-point pen
• answer all questions
• show all your working.
Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 80 marks.
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
V1.1
Copyright © 2017 Oxford International AQA Examinations and its licensors. All rights reserved.
, 2
Section A
Answer all questions in this section.
0 1 Figure 1 shows a cross-section through an optical fibre used for communications.
Figure 1
0 1 . 1 Identify the part of the fibre labelled X.
[1 mark]
V1.1
Copyright © 2017 Oxford International AQA Examinations and its licensors. All rights reserved.
, 3
0 1 . 2 Calculate the critical angle for the boundary between the core and X.
[2 marks]
.
angle = degrees
0 1 . 3 The ray leaves the core at Y. At this point the fibre has been bent through an angle
of 30° as shown in Figure 1.
Calculate the value of angle i.
[1 mark]
.
angle = degrees.
0 2 . 1 A metal wire of length 1.4 m has a uniform cross-sectional area of 7.8 × 10 m .
–7 2
Calculate the resistance, R, of the wire.
Resistivity of the metal = 1.7 × 10 Ω m
–8
[2 marks]
.
resistance = Ω
0 2 . 2 The wire is now stretched to twice its original length by a process that keeps its
volume constant. The resistivity of the metal of the wire remains constant.
Show that the resistance increases to 4R.
[2 marks]
V1.1
Copyright © 2017 Oxford International AQA Examinations and its licensors. All rights reserved.
, 4
0 3 Figure 2 shows the lowest three energy levels of a hydrogen atom.
Figure 2
An electron is incident on a hydrogen atom. As a result an electron in the ground
state of the hydrogen atom is excited to the n = 2 energy level. The atom then
emits a photon of a characteristic frequency.
Explain how the electron in the ground state becomes excited to the n = 2 energy
level.
[2 marks]
0 4 A battery in a laptop computer has an electromotive force (emf) of 14.8 V and can
3
store a maximum charge of 15.5 × 10 C. The battery has negligible internal
resistance.
Calculate the maximum amount of energy this battery can deliver.
[2 marks]
maximum energy = ____ J
V1.1
Copyright © 2017 Oxford International AQA Examinations and its licensors. All rights reserved.
PHYSICS
(9630)
PAPER 2
Specimen 2018 Morning Time allowed: 2 hours
Materials
For this paper you must have:
• a pencil
• a ruler
• a calculator
• a data and formula booklet.
Instructions
• use black ink or ball-point pen
• answer all questions
• show all your working.
Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 80 marks.
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
V1.1
Copyright © 2017 Oxford International AQA Examinations and its licensors. All rights reserved.
, 2
Section A
Answer all questions in this section.
0 1 Figure 1 shows a cross-section through an optical fibre used for communications.
Figure 1
0 1 . 1 Identify the part of the fibre labelled X.
[1 mark]
V1.1
Copyright © 2017 Oxford International AQA Examinations and its licensors. All rights reserved.
, 3
0 1 . 2 Calculate the critical angle for the boundary between the core and X.
[2 marks]
.
angle = degrees
0 1 . 3 The ray leaves the core at Y. At this point the fibre has been bent through an angle
of 30° as shown in Figure 1.
Calculate the value of angle i.
[1 mark]
.
angle = degrees.
0 2 . 1 A metal wire of length 1.4 m has a uniform cross-sectional area of 7.8 × 10 m .
–7 2
Calculate the resistance, R, of the wire.
Resistivity of the metal = 1.7 × 10 Ω m
–8
[2 marks]
.
resistance = Ω
0 2 . 2 The wire is now stretched to twice its original length by a process that keeps its
volume constant. The resistivity of the metal of the wire remains constant.
Show that the resistance increases to 4R.
[2 marks]
V1.1
Copyright © 2017 Oxford International AQA Examinations and its licensors. All rights reserved.
, 4
0 3 Figure 2 shows the lowest three energy levels of a hydrogen atom.
Figure 2
An electron is incident on a hydrogen atom. As a result an electron in the ground
state of the hydrogen atom is excited to the n = 2 energy level. The atom then
emits a photon of a characteristic frequency.
Explain how the electron in the ground state becomes excited to the n = 2 energy
level.
[2 marks]
0 4 A battery in a laptop computer has an electromotive force (emf) of 14.8 V and can
3
store a maximum charge of 15.5 × 10 C. The battery has negligible internal
resistance.
Calculate the maximum amount of energy this battery can deliver.
[2 marks]
maximum energy = ____ J
V1.1
Copyright © 2017 Oxford International AQA Examinations and its licensors. All rights reserved.
