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DC (CW/SW) 49111/3 © UCLES 2012
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONSGeneral Certificate of EducationAdvanced Subsidiary Level and Advanced Level
PHYSICS
 
9702/34
Paper 3 Advanced Practical Skills 2
May/June 2012
CONFIDENTIAL INSTRUCTIONS
Great care should be taken to ensure that any confidential information given does not reach thecandidates either directly or indirectly.No access to the Question Paper is permitted in advance of the examination.
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If you have any problems or queries regarding these Instructions, please contact CIEby e-mail: international@cie.org.uk,by phone: +44 1223 553554,by fax: +44 1223 553558,stating the Centre number, the nature of the query and the syllabus number quoted above.
 
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9702/34/CI/M/J/12 © UCLES 2012
Preparing apparatus
These instructions detail the apparatus required for the experiments in the Question Paper. It isessential that absolute confidentiality is maintained in advance of the examination: the contents ofthese instructions must not be revealed either directly or indirectly to candidates.No access is permitted to the Question Paper in advance of the examination.If you have problems or queries regarding these instructions, please contact CIE:by e-mail: international@cie.org.uk,or by telephone: +44 1223 553554,or by fax: +44 1223 553558,stating the nature of the query and quoting the syllabus and paper numbers (9702/34).It is assumed that the ordinary apparatus of a Physics laboratory will be available.
Number of sets of apparatus
The number of sets of apparatus provided for each experiment should be
12
, where
is the numberof candidates taking the examination. There should, in addition, be a few spare sets of apparatusavailable in case problems arise during the examination.
Organisation of the examination
Candidates should be allowed access to the apparatus for each experiment for one hour only. Afterspending one hour on one experiment, candidates should change over to the other experiment. Theorder in which a candidate attempts the two experiments is immaterial.
Assistance to Candidates
Candidates should be informed that, if they find themselves in real difficulty, they may ask the Supervisorfor practical assistance, but that the extent of this assistance will be reported to the Examiner, who maymake a deduction of marks.Assistance should only be given:when it is asked for by a candidate,or as directed in the Notes sections of these instructions,or where apparatus is seen to have developed a fault.Assistance should be restricted to enabling candidates to make observations and measurements.Observations and measurements must not be made for candidates, and no help should be given withdata analysis or evaluation.All assistance given to candidates must be reported on the Supervisor’s Report Form.
Faulty apparatus
In cases of faulty apparatus (not arising from a candidate’s mishandling) that prevent the requiredmeasurements being taken, the Supervisor may allow extra time to give the candidate a fair opportunityto perform the experiment as if the fault had not been present. The candidate should use a sparecopy of the Question Paper when the fault has been rectified or when working with a second set ofapparatus.
Supervisor’s Report
The Supervisor should complete the Supervisor’s Report Form on pages 7 and 8 and enclose it in theenvelope containing the answers of the candidates. If more than one envelope is used, a copy of thereport must be enclosed in each envelope.
 
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9702/34/CI/M/J/12 © UCLES 2012
[Turn overQuestion 1Apparatus requirements (per set of apparatus, unless otherwise specified)
3 V d.c. power supply (e.g. two 1.5 V cells).Switch.Three component holders with crocodile clips and terminals. One component holder should be labelledX and fitted with a 330
Ω
resistor, and a second component holder should be labelled Y and fitted witha 680
Ω
resistor.D.C. ammeter with a range of at least 0–20 mA and reading to 0.1 mA or better. A multimeter set to thisrange is suitable, provided the range switch is fixed and any unused terminals are covered.Resistors with values 4.7 k
Ω
, 3.3 k
Ω
, 2.2 k
Ω
, 1.5 k
Ω
, 1.0 k
Ω
, 0.68 k
Ω
, 0.47 k
Ω
, 0.33 k
Ω
and 0.22 k
Ω
eachlabelled with its value in k
Ω
to 2 significant figures, e.g. ‘0.68 k
Ω
’ and ‘3.3 k
Ω
’.Eight connecting leads.
Notes1
All the resistors should be rated at 0.25 W, with a maximum tolerance of 5%.
2
The apparatus should be laid out on the bench. If it is to be used by another candidate, then itshould be restored to its srcinal state.
Information required by Examiners
Sample set of numerical results, clearly labelled “Supervisor’s Results” and obtained out of sight of thecandidates.
 
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9702/34/CI/M/J/12 © UCLES 2012
Question 2Apparatus requirements (per set of apparatus unless otherwise specified)
Two smooth, round-headed nails of length approximately 60 mm and diameter approximately 2.5 mm.Piece of wood of length 300 mm and with cross-section (15 mm ± 2 mm) × (25 mm ± 5 mm). See Note 1.Thin wooden rod of diameter approximately 3 mm and length 130 mm.Wooden block of dimensions 30 mm × 30 mm × 150 mm. See Note 2.Stopwatch reading to 0.1 s or better.A4 size image of a 180° protractor, mounted on thick card. See Note 3.Five straight copper specimens of diameter approximately 0.70 mm (22 swg) and length 40 mm. Theycan be cut from either bare or enamelled copper wire and should be placed in a small tray (e.g. aplastic petri dish).Five straight copper specimens of diameter approximately 0.90 mm (20 swg) and length 40 mm. Theycan be cut from either bare or enamelled copper wire and should be placed in a small tray (e.g. aplastic petri dish).Retort stand (minimum height 60 cm and with a flat base) and two bosses.Small piece of Blu-Tack.Access to a micrometer reading to 0.01 mm, shared between at most three candidates.30 cm ruler with a millimetre scale.
Notes1
The mass of the piece of wood should be between 60
 
g and 80 g (the 25 mm dimension may bereduced or increased to bring the mass into this range). A hole of suitable diameter should bedrilled through the wood, as shown in Fig. 2.1. The hole should be just large enough for the pieceof wood to swing freely on a nail through it.25
 
mm10
 
mm15
 
mmhole central andperpendicular to face
Fig. 2.1
of 8