UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS
International General Certificate of Secondary Education
CANDIDATE
NAME
U_o_rkJ_Anwer
! __
ITIIIJ
CENTRE
NUMBER
1
CANDIDATE
NUMBER
ITIIJ
PHYSICS
0625/61
Paper 6 Alternative to Practical
October/November 2012
1 hour
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Candidates answer on the Question Paper
READ THESE INSTRUCTIONS FIRST
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No Additional Materials are required.
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Write your Centre number, candidate number and name in the spaces at the top of the page.
Write in dark blue or black pen.
You may use a pencil for any diagrams or graphs.
Do not use staples, paper clips, highlighters, glue or correction fluid.
DO NOT WRITE IN ANY BARCODES.
Answer all questions.
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At the end of the examination, fasten all your work securely together.
The number of marks is given in brackets [ 1 at the end of each question or part question.
ny
For Examiner's Use
1
Ha
2
3
4
5
Total
This document consists of 11 printed pages and 1 blank page.
DC (CW/SW)
50194/4
© UCLES 2012
, UNIVERSITY
of CAMBRIDGE
International Examinations
[Turn over
2
1
The IGCSE class is investigating the stretching of a spring.
Fig. 1.1 shows the experimental
For
Examiner's
Use
set up.
clamp -----spring
bench
On Fig. 1.1, measure the verticaldistance
and the surface of the bench.
Jepend{
do, in mm, between the bottom of the spring
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(a)
y
Fig. 1.1
DnU'
c;:r:
2...l
m~ [1]
(b) The diagram is drawn 1/10th actual size. Calculate the actual distance Do' in mm,
21 )( 10 ::.210
Do
21.0
=
mi
[1]
A student hangs a 1.0 N load on the spring. He measures and records the distance 0
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(c)
Ge
between the bottom of the spring and the surface of the bench.
between the bottom of the spring and the surface of the bench, and the value of the
load L.
He repeats the procedure using loads of 2.0 N, 3.0 N, 4.0 Nand
readings are shown in Table 1.1.
5.0 N. The distance
Ha
=
ny
Calculate the extension e of the spring, for each set of readings, using the equation
e (Do - D). Record the values of Land e in Table 1.1.
© UCLES 2012
UN
Table 1.1
D/mm
e/mm
1.0
199
J
.2·0
191
Iq.O
3·0
179
j,.O
~.O
171
~q.O
5·0
160
50.0
'·0
[2]
0625/61/0/N/12
3
Plot a graph of e/mm (y-axis) against UN (x-axis).
For
Examiner's
Use
y
(d)
\0
o
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Ha
(f)
[4]
L/N
Determine the gradient G of the graph. Show clearly on the graph how you obtained the
necessary information.
ny
(e)
2..
Ge
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2.0
G
When making measurements,
= ..................•
1..0
[2]
the student is careful to avoid a line-of-sight error.
Suggest one other precaution that the student should take when measuring the distance
o between the bottom of the spring and the surface of the bench.
AlwayfHvne.artl~flo.lnmrN.fB'rJf()(LH
HHHH
SPl~r:J (topb(:bal/r;m.,fr.~[11
[Total: 11]
© UCLES 2012
0625/61/0/N/12
[Turn over
4
2
The IGCSE class is investigating the rate of cooling of water under different conditions.
For
Examiner's
Use
The apparatus is shown in Fig. 2.1.
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thermometer -
• ill
•
o
o
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------
_
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--=-_-_-
---1---
water
I
Fig. 2.1
Record the value of room temperature
OR shown on the thermometer
ny
(a)
OR
Ha
© UCLES 2012
Fig. 2.2
0625/6110/N/12
=
2..
~
in Fig. 2.2.
~c....
[1]
5
(b) A student pours 150 cm3 of hot water into a beaker. She measures the temperature 0 of
the water at time t 0 and records it in a table.
=
For
Examiner's
Use
She starts a stopciock and records the temperature of the water at 30s intervals until
she has a total of six values up to time t 150 s. The readings are shown in Table 2.1.
=
She repeats the procedure, using 250 cm3 of hot water.
Table 2.1
volume of water
250cm3
150cm3
°c
Of
84
30
79
60
74
90
70
120
68
79
75
72
66
70
68
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150
C
85
Ge
0
Of
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S
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tI
[1]
(i)
Complete the column headings in the table.
(ii)
State whether the rate of cooling is significantly faster, ~,
or about the same
when using the larger volume of hot water. Justify your answer by reference to the
rSladin,g,s.
ny
v.:P../U~
5MCl/(U.
justification
...........&JAr: {~
Ha
same:
A.b.()ut ~
statement
~~
I4).ltJ~
.
«.~.~8..4 ~ ..,.,
fa. .f
cJtaM
8.5 -..6.~ .
HHCIxI'!r""tr;c.#t4f.tHNea:!JtCtSOmL[2i
(c)
If this experiment were to be repeated in order to check the results, it would be important
to control the conditions. Suggest two such conditions that should be controlled.
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1
It.6ltJlItlL.
2
r;200(t1 ~rJu~
~»v2.
;",,/;«(
© UCLES 2012
~CL
~
eo:
wA;br
0625/61/0/N/12
~reJz(t'f!.
.
.
[2]
[Total: 6]
[Turn over
6
3
The IGCSE class is investigating the potential differences across circuit components.
For
Examiner's
Use
Fig. 3.1 shows the apparatus used.
power
pack
J
ammeter
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lamp N
voltmeter
Fig. 3.1
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Draw a circuit diagram of the circuit shown in Fig. 3.1, using standard symbols.
'POVI« 1tt de
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(a)
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N
Ha
[3]
(b) A student records the current lA' the potential difference
potential difference VM across lamp M.
(i)
Calculate the potential difference
VA VL + VM·
lA
=
VL
=
VM
=
VL across lamp L and the
p ..~.~.~
~:.~.Y
~:.~.y
VA across lamps Land
.
.
.
M using the equation
=
VA
© UCLES 2012
0625/61/0/N/12
=
...................
f.·.9
V
.
7
(ii)
Calculate
R=~
A
RA' the combined resistance of lamps L, M and N, using the equation
For
Examiner's
Use
V
fA
-
(.t:(
0.65
RA
Q.·..CJ?
=
.g .
[2]
On Fig. 3.2, draw a pointer showing the current fA = 0.65A.
(iii)
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1.0
[1]
Fig. 3.2
(c)
The student rearranges the circuit so that the three lamps are in series with each other.
He records the potential difference across each lamp in turn.
\I
_
0.6V
.
L -
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V
Calculate the potential
VB
VL + VM + VN·
difference
VB across
ny
=
.
VM
=
9:?'!.
.
VN
=
9:?'!.
.
the three
VB
=
lamps
using the equation
~.~ .. Q
V
.
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(d) A student suggests that VA shoul~ be equal to VB'
State whether the results support this suggestion and justify your answer with reference
to the results.
yes
statement
justification
l.~..9.
V ~
20
.
v. ~~
.
ClctLH&t{)uykw ~'ff,.;t:lHiJ,.l.(mlt1i2i
~p ey',me-n-liJ i a ace II fl,( t4
I
© UCLES 2012
0625/61/0/N/12
[Total: 8]
[Turn over
8
4
The IGCSE class is investigating the refraction of light passing through a transparent block.
The apparatus and ray-trace sheet are shown in Fig. 4.1.
o
F
~~------------_;B
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A,r-
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o
ray-trace sheet
Fig. 4.1
© UCLES 2012
0625/61/0/N/12
c
For
Examiner's
Use
9
(a)
A student places the transparent block, largest face down, on the ray-trace sheet. She
draws the outline of the block ABCD.
(i)
(ii)
On Fig. 4.1, draw a normal at the centre of side AB. Label the point E where the
normal crosses AB.
Draw a line FE to the left of the normal and at an angle of incidence i
normal.
= 30° to the
[2]
The student places two pins P1 and P2 on the line FE, placing one pin close to E. She
observes the images of P 1 and P 2 through side CD of the block so that the images of P 1
and P 2 appear one behind the other. She places two pins P 3 and P 4 between her eye
and the block so that P 3 and P 4' and the images of P 1 and P 2 seen through the block,
appear one behind the other.
(i)
On Fig. 4.1, mark suitable positions for the pins P 1 and P2.
(ii)
Draw a line joining the positions of P3 and P4' Continue the line until it meets CD
and label this point G.
[1]
(iii)
(c)
(i)
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(b)
For
Examiner's
Use
Draw the line GE.
Measure and record the angle of refraction r between the line GE and the normal.
Calculate the ratio ~.
.
~=
o
.I.\? ..~
=
(ii)
0
[1]
·[1]
i = 40°. The angle of
Calculate the ratio ~.
b..?.~
~=
Ha
(i)
QO
3/.2 .(..1.,.5 ..].
The student repeats the procedure but with the angle of incidence
refraction r 26°.
ny
(d)
30
2.0
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~~ ::-_'=
r
Ge
r=
(ii)
[1]
[1]
A student suggests that the ratio ~ should be a constant.
State and explain briefly whether your results support this suggestion .
........................
yes
WiT$if:l7kLinil:,Jf!/)<
p.
ina.cCl.lra
..............................................................................................................................
cy
.
[1]
[Total: 8]
© UCLES 2012
0625/61/0/N/12
[Turn over
10
5
(a)
The IGCSE class has a range of apparatus available. Here is a list of some of the
apparatus.
ammeter
barometer
beaker
electronic balance
manometer
measuring cylinder
metre rule
(spring balance)
y
newtonmeter
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stopwatch
tape measure
thermometer
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voltmeter
Complete Table 5.1 by inserting the name of one piece of apparatus from the list that is
the most suitable for measuring each quantity described.
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Table 5.1
quantity to be measured
H~af""':~9CyGndJr
--rc:u
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volume of water
most suitable apparatus
-
a distance of about 50 m
CtJ. ~
Newf'PnmJo,.. (SpI"1j balttll. )
Ha
the force required to lift a laboratory stool
Wllt:l
the mass of a coin
b'~C?fvon/c
the pressure of the laboratory gas supply
fvfanorNky-
~~rJCt..
[5]
© UCLES 2012
0625/61/0/N/12
For
Examiner's
Use
11
(b) The IGCSE class is carrying out a lens experiment. This involves using an illuminated
object, a screen and a lens.
For
Examiner's
Use
Firstly, the distance between the illuminated object and the lens is measured with a
metre rule. Next, a clearly focused image is obtained on the screen.
(i)
Explain briefly how you would avoid a parallax (line-of-sight)
metre rule.
error when using the
(ii)
State a precaution that you would take to ensure that the image is well focused.
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····················or.-:-································
y
l1oll":Jt.wJ.SJ.~Ck.CiNd.fb.t7fj
Ha
ny
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Ge
.........................
Do.(.l(en ~ 4..rea.
© UCLES 2012
0625/61/0/N/12
.
[1]
[Total: 7]