June 2014 (v3) QP - Paper 3 CIE Physics IGCSE
June 2014 (v3) QP - Paper 3 CIE Physics IGCSE
June 2014 (v3) QP - Paper 3 CIE Physics IGCSE
PHYSICS 0625/33
Paper 3 Extended May/June 2014
1 hour 15 minutes
Candidates answer on the Question Paper.
No Additional Materials are required.
Write your Centre number, candidate number and name on all the work you hand in.
Write in dark blue or black pen.
You may use an HB pencil for any diagrams or graphs.
Do not use staples, paper clips, glue or correction fluid.
DO NOT WRITE IN ANY BARCODES.
At the end of the examination, fasten all your work securely together.
The number of marks is given in brackets [ ] at the end of each question or part question.
The syllabus is approved for use in England, Wales and Northern Ireland as a Cambridge International Level 1/Level 2 Certificate.
DC (NF/SW) 81294/3
© UCLES 2014 [Turn over
PMT
Fig. 1.1 shows the racing car, of total mass 750 kg, slowing down by using parachutes.
Fig. 1.1
Fig. 1.2 is the speed-time graph for 20 s after the car reaches full speed.
80
70
speed 60
m/s
50
40
30
20
10
0
0 2 4 6 8 10 12 14 16 18 20
time t / s
Fig. 1.2
(i) mark a point, labelled A, where the car is moving at constant speed,
(ii) mark a point, labelled B, where the car is decelerating at a uniform rate,
(iii) mark a point, labelled C, where the car is decelerating at non-uniform rate.
[3]
(b) Calculate
(c) Explain why there is no resultant force acting on the car at time t = 4.0 s.
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[Total: 8]
(a) With the aid of a labelled diagram, describe an experiment to determine the volume of the
stone.
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(b) (i) State the other quantity, apart from the volume, that must be measured in order to
determine the density.
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(c) The student now wishes to determine the volume of a small, irregularly shaped piece of wood
that floats in water. He notices that a small lead weight tied to the wood makes it sink in water.
Describe how the student can adapt the experiment in (a) to determine the volume of the
wood. You may draw a diagram.
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[Total: 8]
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(b) Fig. 3.1 shows an apple and a 0.40 N weight placed on the rule so that the rule remains
balanced at the 50 cm mark.
0.40 N
apple weight
50 cm
mark
25 cm
45 cm
pivot
The centre of mass of the apple is 25 cm from the pivot and the centre of mass of the weight
is 45 cm from the pivot.
Calculate
(c) The apple is not moved. The weight is removed from the rule and the pivot is moved to the left
until the rule balances as shown in Fig. 3.2.
apple
50 cm
mark
pivot
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(ii) The pivot in Fig. 3.2 is closer to the 50 cm mark than to the centre of mass of the apple.
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[Total: 7]
4 A teacher shows a class examples of three states of matter. These are a solid metal block resting
on the bench, a liquid in a glass beaker and a gas in a clear balloon in the laboratory.
(a) (i) Complete Fig. 4.1b, to show the arrangement of molecules in the liquid.
(ii) Complete Fig. 4.1c, to show the arrangement of molecules in the gas.
[3]
(b) (i) In the list below, draw a ring around the state of matter that is the easiest to compress.
[1]
(ii) In terms of its molecules, explain why this state of matter is the easiest to compress.
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[Total: 6]
5 During both boiling and evaporation, liquid water is converted into water vapour.
The rate at which the mass of boiling water decreases depends only on the rate at which the
water is gaining thermal energy.
(a) The specific latent heat of vaporisation of water is 2.3 × 106 J / kg. Thermal energy is supplied
to boiling water in a kettle at a rate of 460 W.
(b) The rate at which the mass of evaporating water decreases depends on other factors.
1. .......................................................................................................................................
2. .......................................................................................................................................
[2]
(ii) State two other ways in which evaporation is different from boiling.
1. .......................................................................................................................................
2. .......................................................................................................................................
[2]
[Total: 6]
10
6 The liquids in five liquid-in-glass thermometers A, B, C, D and E expand linearly with temperature.
All the thermometers have scales marked in °C. Fig. 6.1 accurately represents the scales of these
five thermometers.
°C
°C
°C 45
110
50
°C
300
°C
250
0
–50 –10 0 100 30
A B C D E
Fig. 6.1
(a) (i) Use information from the scales of the thermometers in Fig. 6.1 to state which
thermometer has the greatest range.
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(ii) State and explain which thermometer has the greatest sensitivity.
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(b) Suggest two design features that would cause a liquid-in-glass thermometer to have a large
sensitivity.
1. ..............................................................................................................................................
2. ..............................................................................................................................................
[2]
11
(c) The distance on thermometer B between the 110 °C mark and the −10 °C mark is 18 cm.
Calculate the length of the liquid thread above the −10 °C mark when the temperature
recorded by B is 70 °C.
[Total: 6]
12
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(b) A sound wave of frequency 7.5 kHz travels through a steel beam at a speed of 6100 m / s.
(i) Calculate the wavelength of this sound wave in the steel beam.
(ii) The sound wave passes from the end of the beam into air.
State
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[Total: 6]
13
8 A lamp in a large room is suspended below a horizontal mirror that is fixed to the ceiling. Fig. 8.1 is
a scale diagram of the lamp and mirror.
lamp
Fig. 8.1
(a) (i) On Fig. 8.1, draw two rays from the centre of the lamp that strike the mirror. Use these
rays to locate the image. Label the image I. [3]
(ii) State two characteristics of this image.
1. .......................................................................................................................................
2. .......................................................................................................................................
[2]
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[Total: 6]
14
9 Fig. 9.1 represents two identical metal plates, positioned horizontally, one above the other in a
vacuum.
Fig. 9.1
A negative charge of 0.000 000 042 C (4.2 × 10−8 C) is transferred to the upper plate, leaving the
lower plate with a positive charge of the same size.
(a) On Fig. 9.1, draw the pattern of the electric field between the two plates and indicate the
direction of the lines of force. [3]
(b) (i) A conducting copper wire is used to connect the two plates and this leaves the plates
uncharged. Charge flows in the wire for 0.000 000 035 s (3.5 × 10−8 s).
(ii) State, in terms of its atomic structure, why the copper wire is an electrical conductor.
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[Total: 8]
15
10 The electric circuit in a clothes dryer contains two heaters X and Y in parallel. Fig. 10.1 shows the
circuit connected to a 230 V power supply.
230 V
Fig. 10.1
[Total: 6]
16
Fig. 11.1 represents the transformer, consisting of an iron core with two coils P and Q wound on to
the core.
iron core
Fig. 11.1
When P is connected to a 230 V a.c. supply, there is an e.m.f. across the terminals of Q.
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17
State
(i) the name of the circuit component that is used in a rectifier circuit to rectify the a.c.
(alternating current),
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(ii) the property of this component that is used to rectify the current.
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[Total: 7]
18
12 Overhead power cables supply electrical power to a town that is a considerable distance from the
power station.
The voltage at which the power is transmitted in the cables is very much greater than the voltage
at the power station and the voltage of the mains supply in the town.
(a) Explain the advantage of transmitting electrical power at a very high voltage.
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(b) It is suggested that the resistance of the cables can be changed by doubling their diameter.
(i) Explain the effect of this change on the resistance of the cables.
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[Total: 6]
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