Please write clearly in block capitals.
Centre Candidate
number number
Surname
Forename(s)
Candidate re
signatu
A-level
PHYSICS
Paper 1
Time allowed: 2 hours
Materials For Examiner’s Use
For this paper you must have:
a pencil and a ruler Questio Mark
n
a scientific calculator
1
a Data and Formulae Booklet
a protractor. 2
3
Instructions
4
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page. 5
Answer all questions. 6
You must answer the questions in the spaces provided. Do 7–31
not write outside the box around each page or on blank
pages. TOTAL
If you need extra space for your answer(s), use the lined pages at
*
the end of this book. Write the question number against your IB/M/Jun22/E12
answer(s).
Do all rough work in this book. Cross through any work you do
not want to be marked.
Show all your working.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 85.
You are expected to use a scientific calculator where appropriate.
A Data and Formulae Booklet is provided as a loose insert.
,7408/1
, 2
Do not write
outside the
Section A Do not
boxwrite
outside the
box
Answer all questions in this
section.
4 3
0 1 Two stable isotopes of helium are He and He.
2 2
4
0 1 .1 An atom of He is produced in a rock that contains uranium. It is produced following
2
238
the radioactive decay of a U atom. The decay also creates an atom of
92
thorium (Th).
Write an equation for the decay of
238
U. [2 marks]
92
238U →
92
3 3
0 1 .2 A He nucleus can be produced by the decay of a tritium nucleus H.
2 1
State and explain which exchange particle is responsible for this decay.
[2 marks]
*02
IB/M/
* Jun22/7408/1
, 3
Do not write outside the box
Helium was discovered by analysing the light in the absorption spectrum of
the Sun.
Figure 1 shows the positions of the brightest lines, labelled A to F, in the
emission spectrum of helium. The brightest lines in the emission spectra
of sodium and hydrogen are also shown.
Figure 1
0 1 .3 Before helium was identified, some scientists suggested that the lines of
the helium spectrum seen in the absorption spectrum of the Sun were
due to the presence of sodium and hydrogen.
Discuss, with reference to the lines A to F in Figure 1, the evidence for
and against this suggestion.
[2 marks]
Question 1 continues on the next page
Turn over ►
*03
IB/M/
* Jun22/7408/1
Centre Candidate
number number
Surname
Forename(s)
Candidate re
signatu
A-level
PHYSICS
Paper 1
Time allowed: 2 hours
Materials For Examiner’s Use
For this paper you must have:
a pencil and a ruler Questio Mark
n
a scientific calculator
1
a Data and Formulae Booklet
a protractor. 2
3
Instructions
4
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page. 5
Answer all questions. 6
You must answer the questions in the spaces provided. Do 7–31
not write outside the box around each page or on blank
pages. TOTAL
If you need extra space for your answer(s), use the lined pages at
*
the end of this book. Write the question number against your IB/M/Jun22/E12
answer(s).
Do all rough work in this book. Cross through any work you do
not want to be marked.
Show all your working.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 85.
You are expected to use a scientific calculator where appropriate.
A Data and Formulae Booklet is provided as a loose insert.
,7408/1
, 2
Do not write
outside the
Section A Do not
boxwrite
outside the
box
Answer all questions in this
section.
4 3
0 1 Two stable isotopes of helium are He and He.
2 2
4
0 1 .1 An atom of He is produced in a rock that contains uranium. It is produced following
2
238
the radioactive decay of a U atom. The decay also creates an atom of
92
thorium (Th).
Write an equation for the decay of
238
U. [2 marks]
92
238U →
92
3 3
0 1 .2 A He nucleus can be produced by the decay of a tritium nucleus H.
2 1
State and explain which exchange particle is responsible for this decay.
[2 marks]
*02
IB/M/
* Jun22/7408/1
, 3
Do not write outside the box
Helium was discovered by analysing the light in the absorption spectrum of
the Sun.
Figure 1 shows the positions of the brightest lines, labelled A to F, in the
emission spectrum of helium. The brightest lines in the emission spectra
of sodium and hydrogen are also shown.
Figure 1
0 1 .3 Before helium was identified, some scientists suggested that the lines of
the helium spectrum seen in the absorption spectrum of the Sun were
due to the presence of sodium and hydrogen.
Discuss, with reference to the lines A to F in Figure 1, the evidence for
and against this suggestion.
[2 marks]
Question 1 continues on the next page
Turn over ►
*03
IB/M/
* Jun22/7408/1
