# Cambridge International Examinations Cambridge Ordinary Level

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Cambridge International ExaminationsCambridge Ordinary Level* 5 6 0 7 7 8 6 4 9 3 *5054/41PHYSICSPaper 4 Alternative to PracticalOctober/November 20171 hourCandidates answer on the Question Paper.No Additional Materials are required.READ THESE INSTRUCTIONS FIRSTWrite 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.Answer all questions.Electronic calculators may be used.You may lose marks if you do not show your working or if you do not use appropriate units.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.This document consists of 9 printed pages and 3 blank pages.DC (NH/SW) 134852/2 UCLES 2017[Turn over

21A student finds the mass of a table-tennis ball using a top-pan balance, as shown in Fig. 1.1. Thetop-pan balance reads to the nearest gram.top-pan balance0 gFig. 1.1(a) The mass of the ball is about 2.5 g.Suggest a reason why placing the ball on the top-pan balance does not give an accuratevalue for the mass of the ball.[1](b) The student uses ten identical balls and a glass beaker to hold them, as shown in Fig. 1.2.beakerFig. 1.2Explain in detail how the student can obtain a more accurate value for the mass of one ball.[3] UCLES 20175054/41/O/N/17

32A student investigates how high a table-tennis ball bounces. He drops the ball from a height of60 cm onto a tiled floor, as shown in Fig. 2.1. He records the height h of the bounce using a metrerule with millimetre divisions.100819080807060504030table-tennis ball20petri dish10cmtiled floorFig. 2.1(a) The ball is placed near the metre rule so that, when released, it falls 60 cm before it hits thefloor.On Fig. 2.1, draw the ball in its starting position.[1](b) Before recording any values for the height of the bounce, the student performs a trial drop.Suggest a reason for doing this trial drop.[1](c) He drops the ball five times from 60 cm and records the following values of h.40 cm(i)39 cm40 cm42 cm40 cmSuggest a reason why h is recorded to the nearest cm.[1](ii)Calculate the average bounce height hav. Give your answer to the nearest centimetre.hav .[2] UCLES 20175054/41/O/N/17[Turn over

4(d) The student extends the investigation to find the average bounce height hav from other dropheights H. Fig. 2.2 shows the results obtained.drop height H / cmbounce height hav / cm601005614074180862209426096Fig. 2.2(i)On Fig. 2.2, add your value of hav at H 60 cm.(ii)To get the larger values of H, the student changes his apparatus and method. Suggesthow he does this.[2](iii)(e) (i)On Fig. 2.3, plot a graph of hav / cm on the y-axis against H / cm on the x-axis. Start youraxes from (0,0). Draw a smooth curve of best fit.The student does not take any readings of hav for H less than 60 cm.Suggest why these readings are difficult to take.[1](ii)Use your graph to estimate the value of hav when H is 40 cm.hav .[1] UCLES 20175054/41/O/N/17

500[4]Fig. 2.3 UCLES 20175054/41/O/N/17[Turn over

63Fig. 3.1 shows a thermistor. A thermistor is a type of resistor whose resistance is affected bychanges in temperature.connecting wiresthermistorFig. 3.1Fig. 3.2 shows a partially completed circuit.5V1000 ΩBAVFig. 3.2(a) The thermistor is connected between A and B in the circuit.On Fig. 3.2, draw the correct circuit symbol for the thermistor between A and B.[1](b) The thermistor is at room temperature and the reading on the voltmeter is shown in Fig. 3.3.V213405Fig. 3.3(i)State the reading V on the voltmeter.V .[1] UCLES 20175054/41/O/N/17

7(ii)The student then records the reading on the voltmeter when the thermistor is at a steadytemperature of 0 C.Suggest how she can reduce the temperature of the thermistor from room temperatureto 0 C in the laboratory.[1](iii)At 0 C, the reading V on the voltmeter is 1.8 V.The resistance R of the thermistor, measured in ohms, can be found usingR 5000- 1000 .VCalculate R at room temperature and at 0 C. Give both answers to 2 significant figures.at room temperature, R .at 0 C, R .[2](iv)Use your results to state how the resistance of the thermistor changes with temperature.[1] UCLES 20175054/41/O/N/17[Turn over

84In Fig. 4.1, AB represents a converging lens. An object PQ is placed with end Q on the principalaxis ST of the lens.APSQFTBFig. 4.1 (full scale)(a) The point F is a focal point (principal focus) of the lens.Measure the focal length of the lens.focal length .[1](b) (i)(ii)Draw a line from P, parallel to ST, to meet the lens AB at point C. Label C.[1]Explain how you ensured that this line is parallel to ST.[1] UCLES 20175054/41/O/N/17

9(c) Draw a straight line from F to C and extend this line until it meets the dotted line at point R.Label R.[1](d) Measure the angle i between the lines RC and CP.i .[1](e) Determine the length l in centimetres wherel 2. 2.sin il .[1](f)Theory suggests that l is equal to the distance CF.Measure CF and comment on the extent to which your results agree with the theory.[1] UCLES 20175054/41/O/N/17

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12BLANK PAGEPermission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Everyreasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, thepublisher will be pleased to make amends at the earliest possible opportunity.To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge InternationalExaminations Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at www.cie.org.uk afterthe live examination series.Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge LocalExaminations Syndicate (UCLES), which is itself a department of the University of Cambridge. UCLES 20175054/41/O/N/17

Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. BLANK PAGE. Title: 5054/41 O Level Physics November 2017 Keywords : CIE,0 Level,Physics,paper 4 Created Date: 1/16/2019 2:18:45 PM .

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