October 2019 paper 2 physics edexcel

Please check the examination details below before entering your candidate information
Candidate surname Other names


Centre Number Candidate Number
Pearson Edexcel
International
Advanced Level

Tuesday 15 October 2019
Morning (Time: 1 hour 30 minutes) Paper Reference WPH12/01

Physics
International Advanced Subsidiary
Unit 2: Waves and Electricity

You must have: Total Marks
Scientific calculator, Ruler



Instructions
• Use black ink or ball-point pen.
• centre
Fill in the boxes at the top of this page with your name,
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 questions 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


P62787A
©2019 Pearson Education Ltd.

1/1/1/1/1/
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, SECTION A

Answer ALL questions.

For questions 1–10 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 The resistance of some electrical components decreases as the applied potential
difference increases.
Which row of the table contains two components that behave in this way?

A diode ohmic conductor
B ohmic conductor filament lamp
C negative temperature coefficient thermistor diode
D negative temperature coefficient thermistor filament lamp

(Total for Question 1 = 1 mark)




2
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,2 The circuit shows a resistor of resistance R connected to a cell of e.m.f. ο and internal
resistance r. When the current in the circuit is I the terminal potential difference is V.
ο

r



I



R

Which of the following is an expression for the power P dissipated in the internal
resistance of the cell?
A P = I (οíV )
B P = I௘2 R
C P=Iο
D P = V2/r

(Total for Question 2 = 1 mark)

3 Light travels at a speed of 2.3 u 108 m sí in water and 2.0 u 108 m sí in glass.
The refractive index of glass is 1.5
Which of the following expressions can be used to determine the refractive index
of water?
(2.3 × 108 ) × 1.5
A
(2.0 × 108 )

(2.0 × 108 ) × 1.5
B
(2.3 × 108 )

(2.0 × 108 )
C
(2.3 × 108 ) × 1.5

(2.3 × 108 )
D
(2.0 × 108 ) × 1.5


(Total for Question 3 = 1 mark)




3
*P62787A0332* Turn over

, 4 Ultraviolet light is incident on a metal surface and photoelectrons are released.
The number of photoelectrons released per second is N and the maximum kinetic energy
of the released electrons is Ek.
Which of the following pairs of graphs shows how N and Ek vary with the intensity I of
the incident light?


N Ek


A


I I


N Ek


B


I I


N Ek


C


I I


N Ek


D


I I

(Total for Question 4 = 1 mark)




4
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