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Centre Number Candidate Number
Pearson Edexcel International Advanced Level
Thursday 18 January 2024
Morning (Time: 1 hour 30 minutes) Paper
reference WPH12/01
Physics
International Advanced Subsidiary/Advanced Level
UNIT 2: Waves and Electricity
You must have: Total Marks
Scientific calculator, ruler
Instructions
•• Use black ink or ball-point pen.
If pencil is used for diagrams/sketches/graphs it must be dark (HB or B).
• Fill in the boxes at the top of this page with your name,
centre number and candidate number.
•• Answer all questions.
Answer the questions in the spaces provided
– there may be more space than you need.
• Show all your working out in calculations and include units where appropriate.
Information
•• The total mark for this paper is 80.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• toIn the question marked with an asterisk (*), marks will be awarded for your ability
structure your answer logically, showing how the points that you make are
related or follow on from each other where appropriate.
• The list of data, formulae and relationships is printed at the end of this booklet.
Advice
•• Read each question carefully before you start to answer it.
Try to answer every question.
• Check your answers if you have time at the end. Turn over
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
For questions 1–10, in Section A, select one answer from A to D and put a cross in the box . If you
change your mind, put a line through the box and then mark your new answer with a cross .
1 A ray of light in air is incident on a glass surface. The angle of incidence is less than the
critical angle.
Which of the following describes what happens to the ray of light?
A partially reflected and partially transmitted
B refracted away from the normal
C totally internally reflected
D transmitted along the normal
(Total for Question 1 = 1 mark)
2 There is an increase in the intensity of light incident on a light dependent resistor
(LDR). This causes a change in the number of conduction electrons and a change in the
resistance of the LDR.
Which row of the table describes these changes?
Number of conduction electrons Resistance of LDR
A decreases decreases
B decreases increases
C increases decreases
D increases increases
(Total for Question 2 = 1 mark)
2
*P75597A0236*
, 3 An electron has a de Broglie wavelength of 3.5 × 10–10 m.
Which of the following expressions gives the velocity of the electron in m s–1?
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
6.63 10
34
A
9.11 10
31 3.5 10
10
6.63 10
34
B
3.5 10
10
9.11 10
31 3.5 10
10
C
6.63 10
34
3.5 10
10
D
6.63 10
34
(Total for Question 3 = 1 mark)
4 Which of the following describes a change in energy of 1 eV?
A A charge of 1 C is accelerated across a potential difference of 1 V.
B A charge of 1 C passes a point in a time of 1 s.
C An electron is accelerated across a potential difference of 1 V.
D There is a current of 1 A for a time of 1 s.
(Total for Question 4 = 1 mark)
3
*P75597A0336* Turn over
, 5 The diagram shows a 1.5 V cell in a circuit with two resistors. The cell has negligible
internal resistance.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
1.5 V
10 Ω
V 5Ω
The switch is closed.
What is the reading on the voltmeter?
A 0.15 V
B 0.50 V
C 1.00 V
D 1.50 V
(Total for Question 5 = 1 mark)
4
*P75597A0436*
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