UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS
GCE Ordinary Level
MARK SCHEME for the October/November 2008 question paper
5054 PHYSICS
5054/04
Paper 4 (Alternative to Practical), maximum raw mark 30
This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners’ meeting before marking began.
All Examiners are instructed that alternative correct answers and unexpected approaches in candidates’ scripts must be given marks that fairly reflect the relevant knowledge and skills demonstrated. Mark schemes must be read in conjunction with the question papers and the report on the examination. •
CIE will not enter into discussions or correspondence in connection with these mark schemes.
CIE is publishing the mark schemes for the October/November 2008 question papers for most IGCSE,
GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses. www.ourpgs.com
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(a) 21
Mark Scheme
GCE O LEVEL – October/November 2008
Syllabus
5054
cao
Paper
04
B1
[1]
B1
[1]
(b) any one of following: allow answer correctly drawn on Fig 1.1 scale/ruler placed close to tube eye (level)/sight perpendicular to ruler/scale/reading NOT meniscus eye level with reading/meniscus
(c) axes: correct way round, labelled quantity and unit
B1
scales: more than ½ grid, sensible, at least three values
B1
points: plotted accurately, to ½ smallest square, maximum size 1 mm dots
B1
line: best fit, straight neatly drawn with ruler; allow joints first to last points
B1
[4]
B1
[1]
B1
[1]
B1
[1]
(d) pressure not zero when not in liquid/when d = 0 / p = 3 to 6 cm water when d = 0 / zero error in reading/measuring pressure / pressure changed when apparatus assembled
(e) d increases (equal amounts) as p increases (by equal amounts) / linear relationship / straight line not through 0,0/positive gradient
NOT directly proportional / doubling d doubles p / linearly proportional / p proportional to d
(f) 18.5 to 19.5
ecf graph
NOT if no line through points drawn on graph
[Total: 9]
(ii) (glows brightly then) blows / filament fuses / melts
M1
voltage / current (too) high / more than working value/6V
(b) variable resistor / variable power supply / changing number / voltage of cells drawn or described
A1
[2]
B1
voltmeter across lamp / power supply drawn or described
B1
start with low V/high R then measure V just before lamp blows
B1
[3]
max 2 if no circuit drawn showing lamp and power supply / incorrectly drawn symbols / additional incorrectly connected components
[Total: 7]
