Paper Reference(s) Examiner’s use only 4420/1F London ...IGCSE... · Specimen Papers and Mark Schemes – London Examinations IGCSE in Physics (4420) 2 Issue 1, September 2003 FORMULAE
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Materials required for examination Items included with question papersNil Nil
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Instructions to CandidatesIn the boxes above, write your centre number and candidate number, your surname, initial(s) andsignature.The paper reference is shown at the top of this page. Check that you have the correct question paper.Answer ALL the questions in the spaces provided in this question paper.Show all the steps in any calculations and state the units.Calculators may be used.
Information for CandidatesThere are 24 pages in this question paper. All blank pages are indicated.The total mark for this paper is 100. The marks for the various parts of questions are shown in roundbrackets: e.g. (2).
Advice to CandidatesYou are reminded of the importance of clear English and careful presentation in your answers.
(c) After 6 s the cyclist slows down.Mark the scale with an X to show a possible position of the cyclist’s front wheel whenthe next photograph is taken.
(1)
(Total 4 marks)
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Q1
Distance in m0 10 20 30
0 s 2 s 4 s 6 s
Specimen Papers and Mark Schemes – London Examinations IGCSE in Physics (4420)4 Issue 1, September 2003
2. (a) The diagrams shows some appliances used in a home.
(i) Which two use electricity to mainly produce light?
............................................................... and ..............................................................(1)
(ii) Which one uses electricity to produce movement?
Specimen Papers and Mark Schemes – London Examinations IGCSE in Physics (4420)Issue 1, September 2003 7
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(b) The diagram shows the inside of an electrostatic precipitator. This is a device forremoving dust from waste gases.As the dust particles move up past the positively charged fine wire grid they gain apositive charge.
(i) Show with an arrow, the direction of movement of the positively charged dustparticles between the wire grid and the earthed metal plate.
(1)
(ii) Explain why the positively charged dust particles move in the direction you haveshown.
Specimen Papers and Mark Schemes – London Examinations IGCSE in Physics (4420)12 Issue 1, September 2003
7. (a) A wind-powered generator is used to produce electrical power when the wind isblowing. The table shows the electrical power generated by the wind for different windspeeds.
(i) On to the axes below, plot the points at wind speeds of 5, 10 and 15 km/h. Draw a
smooth curve through the points.(3)
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Power generated(watts)
0 0 140 500 900 1100 1160 1160
Wind speed(km/h)
0 2 5 8 10 12 15 20
– – – – –
1200 –
1100 –
1000 –
900 –
800 –
700 –
600 –
500 –
400 –
300 –
200 –
100 –
0 –50 10 2015
Wind speed in km / h
Power generatedin watts
Specimen Papers and Mark Schemes – London Examinations IGCSE in Physics (4420)Issue 1, September 2003 13
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(ii) What is the lowest wind speed needed to generate power?
(b) Complete the sentence to show the energy transfer taking place in the wind-poweredgenerator.
........................................... energy is transferred to ........................................... energy.(2)
(Total 8 marks)
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Q7
Specimen Papers and Mark Schemes – London Examinations IGCSE in Physics (4420)14 Issue 1, September 2003
8. (a) The diagram shows two magnets that are attracting each other.
Label the poles on the right-hand magnet.(1)
(b) The diagram shows part of the magnetic field of a magnet.
(i) Draw an arrow on one line to show the direction of the magnetic field.(1)
(ii) Draw one more line of the magnetic field pattern.(1)
(iii) Complete each row of the table.
(2)
(Total 5 marks)
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Q8
S N
Material Attracted to magnet?(Yes or No)
Brass
Iron
Plastic
Specimen Papers and Mark Schemes – London Examinations IGCSE in Physics (4420)Issue 1, September 2003 15
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9. (a) A current of 0.02 A could give a serious electrical shock to a person. If the resistance ofa body is 10 000 ohms, calculate the voltage which will cause this current.
(c) Explain how the earth wire and fuse prevent a person receiving an electric shock whenthe live wire comes into contact with the metal casing of an appliance.
(c) A visible spectrum is produced using a prism. Complete the labelled diagram below byshowing the paths of the red and blue light to show how this happens.
(3)
(Total 5 marks)
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Q11
Gammarays
X-rays Ultra-violet
Visible Micro-waves
Radiowaves
White light
Prism
Screen
Specimen Papers and Mark Schemes – London Examinations IGCSE in Physics (4420)18 Issue 1, September 2003
12. The diagram shows the apparatus used to investigate how the pressure of a gas changes withtemperature. As the water surrounding the gas is heated, the pressure of the gas is measuredusing the pressure gauge.
(b) Complete the table to show what happens to the gas in the flask as the temperature isincreased. Use the words increases, decreases, or stays the same.
(4)
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Rubber tubing Pressure gauge
Thermometer
Can
Water
Gas
Flask
Increases, decreases, or stays the same
Speed of gas particles
Pressure in the flask
Mass of particles
Volume of gas
Specimen Papers and Mark Schemes – London Examinations IGCSE in Physics (4420)Issue 1, September 2003 19
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(c) A sketch graph of the results of the experiment is shown.
(i) What does the graph show about the way in which the pressure of the gas changeswith increasing temperature?
Specimen Papers and Mark Schemes – London Examinations IGCSE in Physics (4420)Issue 1, September 2003 21
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(b) Double glazing is used to reduce the heat loss from houses through the windows. Thetable compares the heat loss for ordinary windows and for double-glazed windows.
The size of the windows and the temperature inside and outside the house are the samein each case.
(i) How many joules per second does using double glazing save?
Specimen Papers and Mark Schemes – London Examinations IGCSE in Physics (4420)Issue 1, September 2003 23
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15. Water flows onto a water-wheel as shown in the diagram. The wheel is turned when thewater strikes the blades. This is used to run a generator, which produces an electric current.
(a) State two main energy changes that take place during this process to produce electricity.