Download Hany El-Gezawy - IGCSE Physics

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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS
International General Certificate of Secondary Education
CANDIDATE
NAME
~_Odc_rL_( ~_Wi_V
1__
DIIJJ
CENTRE
NUMBER
1
nIII
CANDIDATE
NUMBER
~
PHYSICS
0625/32
Paper 3 Extended
October/November
2012
answer on the Question Paper.
No Additional
Materials are required.
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Candidates
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1 hour 15 minutes
A-
READ THESE INSTRUCTIONS
FIRST
G
Write your Centre number, candidate number and name on all the work you hand in.
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.
For Examiner's Use
l-
Answer all questions.
You may lose marks if you do not show your working or if you do not use
appropriate units.
Take the weight of 1 kg to be 10 N (i.e. acceleration of free fall = 10m / s2).
E
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.
1
2
3
4
y
5
an
6
7
8
9
H
,
10
11
Total
This document
DC (RW/SW)
49514/4
© UCLES 2012
consists of 19 printed pages and 1 blank page .
. , UNIVERSITYu/CAMBRIDGE
International
Examinations
[Turn over
-----
----
2
1
Fig. 1.1 shows a car on a roller-coaster
ride.
For
Examiner's
Use
B
water
A
L
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C
Fig.1.1
mass of car = 600 kg
kinetic energy of car at point A
(a)
J
= 160 kJ
Calculate the speed of the car at A.
lz m\f
~
2x
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2K.~=
r('\
16()OOO
bOO
- 5'33.1
v = ~ 533.s
E
speed =
2.3.
m/s
[3]
""
(b) As the car travels from A to B, it loses 40kJ of energy due to friction.
y
The car just manages to roll over the crest of the hill at B.
an
Calculate the height h.
(bO 000 - 1..,0 000 -
be~j
rn9 h
H
P.£
\2.0 000
=
600 X \0 )(.
J
h
12.0 000
'00 J(lh~i9ht h =
© UCLES 2012
120000
0625/32/0/N/12
.20 ",
[2]
3
(c)
At C, the car is slowed down by a shallow tank of water and the kinetic energy of the car
is reduced to zero.
For
Examiner's
Use
Make three suggestions
for what happens to this kinetic energy.
~+ w.~
1
~.,;
2
P·.8
3
)Ourd
~I:
.
IN.~
.
.
~J ( -M·~rJ.
[3]
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[Total: 8]
© UCLES 2012
0625/32/0/N/12
[Turn over
4
2
Fig. 2.1 is a head-on view of an airliner flying at constant speed in a circular horizontal path.
The centre of the circle is to the left of the diagram.
c~
*
Fig. 2.1
On Fig. 2.1, draw the resultant force acting on the airliner. Explain your answer .
..............
~~(.~·VJ.ec.
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(a)
().Cr.efe.rdJ.f",t:j
(~an;,.~n.'1
cG~~c:h;)V)).
ht····fOdD in..C...~ {~..f+
.........................
dtlc.o.H.~). ~ ..C;nkipek.Q &~.~._
.............
~d.
CdM.~
(b) The weight of the airliner is 1.20 x 106 N and there is an aerodynamic
1.39 x 106 N acting at 30° to the left of the vertical.
.
[3]
lift force of
lG
By drawing a scale vector diagram, or otherwise, show that the resultant of these two
forces is in the same direction as the resultant force you drew in (a).
Sear£.
j.. CvY\
=
I. 0
x :06
N
C,2~
X lOG
N
\.2 ~IO
E
o~
4-·Cftl:'
e
1,?qx.\O
t1~2
:::::556
an
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I
I
1
e
~
I
K'""'
I
I
I
H
(f
-==
l.ft (',sqXlo' N)
'l<esu.~~~ 2,~~ em
F;'N -::.O.f I X
~
\0 G
N
We.-,,,t
nOri~(?A.(
~ Lelt
( ,.2 X\06
N)
[3]
0625/32/0/N/12
© UCLES 2012
"4
For
Examiner's
Use
5
(c)
The speed is constant as the airliner flies in this circular path.
For
Examiner's
Use
State and explain what is happening to the velocity.
IldCJei/'/CM'9!J.....................................................................................................................................
[2]
H
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[Total: 8]
© UCLES 2012
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[Turn over
6
3
A thermometer
(a)
uses the value of a physical property to indicate the temperature.
A particular thermometer
is sensitive, linear and has a wide range.
Draw a straight line from each characteristic
feature.
characteristic
For
Examiner's
Use
of this thermometer
of thermometer
to the appropriate
feature of thermometer
reacts quickly to change of temperature
sensitive
ez
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large difference between highest and lowest
measurable temperatures
__-~...Jsame change
I linear
of physical property for same
change of temperature
I fixed points at O·C and 100·C
wide range
(i)
[3]
In the space below, draw a diagram to show the structure
thermometer.
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(b)
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large change of physical property for small
change of temperature
n1eter
H
an
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M"Hi af"
of a thermocouple
[2]
© UCLES 2012
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7
(ii)
Explain why a thermocouple
thermometer
is particularly well suited to measure
For
Examiner's
Use
1. high temperatures,
...........................
hJ.efau /Will n.o7. ~.lf
...........................
.gi~s p...d.
~.~j.h
·
.
1eb.r..
!
.
2. very rapidly changing temperatures .
.
sma.lI.
httJ······¥C;+-t··························
.
..................................................................................................................................
[2]
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[Total: 7]
© UCLES 2012
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[Turn over
8
4
(a)
Fig. 4.1 shows some gas contained in a cylinder by a heavy piston. The piston can move
up and down in the cylinder with negligible friction.
atmosphere
heavy
piston
cylinder
gas
of the atmosphere above the piston.
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There is a small increase in the p.~e
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Fig.4.1
(i)
On Fig. 4.1, draw a possible new position for the lower face of the piston.
(ii)
Explain, in terms of the molecules of the gas and the molecules of the atmosphere,
your answer to (a)(i) .
..............
/1Ir:.
c:p.(((c! 0.1F
e4c.h. ..o1f\A.t':
waJ{s (pi.$..Th rJ.
m.p./(C~I
wi.1i
G
.........................
~
p.ls.ron
.........................
;t. n1D.veS £ p.rr.f.:oA tJ/rh1..
.....
.p.r.e!J:u.~ I fO.~.~.·.·~cr·U~
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l-
..................;[Or:-uz. 8I<.ev:fr!d a.n
H
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.............................................................................................................................
© UCLES 2012
0625/32/0/N/12
[1]
.
.
.
.
.
[3]
For
Examiner's
Use
9
(b)
The pressure of the atmosphere above the piston returns to its original value, and the
piston returns to its original position, as shown in Fig. 4.2.
atmosphere
heavy
piston
For
Examiner's
Use
cylinder
gas
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Fig. 4.2
The gas, piston and cylinder are now heated to a much higher temperature.
(i)
(ii)
On Fig. 4.2, draw a possible new position for the lower face of the piston.
[1]
Explain, in terms of the molecules of the gas and the molecules of the atmosphere,
your answer to (b)(i).
~
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Air(tYsJmolrC»1.trm..S!er
.....................
m.o~....GoIl/J/~."".t bd~I4 ....
#a.J.....ro.~
.......................~A ..:fA.Ch..o..~
....
c...~..W·;ft. ....v.I.<V!~·..~ ..Pt!~
g~t4iJrfi«(£/pl'Ulu.lh.on~botkogJ
mOy..~J I:.t
E
.....................
pj;S~n
.
[2]
[Total: 7]
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P rtJ.tf),ie (fof'~~) e1 ~
UP.. ()rthlt.
© UCLES 2012
0625/32/0/N/12
[Turn over
10
5
Fig. 5.1 shows a thin plastic cup containing hot coffee, which an IGCSE Physics student gets
from a machine.
Fig. 5.2 shows how another student, who finds an empty second cup, has placed his identical
cup of coffee inside this second cup.
\\------------tl--thick
rim
coffee
coffee
thin cup ~-----;
single cup
double cup
Fig. 5.1
(a)
I
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/-----
Fig. 5.2
Suggest and explain a difference that the students will feel when' holding the cups .
_I .
............................ CM.\.l
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.........................
,!)Ou..blo UJp tl~t.s.Q n.ot
.............................
te«. ev..J. 4rA»~I&.
~
.&>
.L~ ....~
...
~o.lc(
.
r_.It.
p~~tI. ..u ..
rn.~...~'ur"""."""
~
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.......................
~a..~r.. ir ..q:>~.c......
C4~~.~
© UCLES 2012
t:
0625/32/0/N/12
.L1....-
<(.~cat.~
..
.
..
s :': [2]
For
Examiner's
Use
11
(b) The students discuss this experience
subject of an experiment.
with their teacher, who makes hot drinks the
For
Examiner's
Use
The same volume of hot water at the same temperature is placed in the single cup and
in the double cup.
The temperature
of the water in each cup is recorded for 10 minutes.
Fig. 5.3 shows the cooling curve for the water in the single cup.
single cup
70
e,
u
temperature
60
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IOC
40
o
2
aw
50
4
6
8
10
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time I minutes
Fig. 5.3
On Fig. 5.3, sketch and label a possible cooling curve for the water in the double cup.
G
Explain why a cup of coffee cools more slowly when a lid is placed over the cup.
E
l-
(c)
[2]
il:-~us~e,..t!lo~.l:bt·~n.~n
.......................i.t.
rek.lt ..~
,~
y
······
..····<~·········rQ~···C4."'
~'~
.C9.X1.~d)~
ct
~
an
......................
'j
................................................
~J~CAl'\)O
~
ev.~n.diOt\.
~~f. .
IM-(l.~~~~Jm..
Co~U~. ··rf'!P.·ct:P··~7········
..~..~
.
[2]
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[Total: 6]
© UCLES 2012
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[Turn over
12
6
Solar panels are positioned on the roof of the house shown in Fig. 6.1. They use thermal
energy from the Sun to provide hot water in an environmentally friend.ly way.
For
Examiner's
Use
solar
panels ~=T-::::::::~~-J.~-.L
JDDl
DO
JDDl
DO
JDDl
DO
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JDDl
DO
Fig. 6.1
Cold water flows to the panels at 15°C. During the day, the panels supply 3.8 kg of hot water
AT==- 6S _\ s~ S
at 65°C every hour.
(a)
Calculate the average energy that the solar panels deliver to the water in one hour.
Specific heat capacity of water = 4200 J / (kg "C).
lG
o ~c
~T
- 3.SX 4200
E
=
1.qg OOO...J
[3]
The solar power incident on the roof during this heating period is ..:.17:..;;0::...0:-_
The2. solar
panels have a total area of 8.0 m2
an
y
(b)
energy
1-.50
-
Calculate the solar energy incident on the panels in one hour.
H
E= "P )(-t
(c)
=0=10
X 8
solar energy
=
Mt.) X (I
~
kx
'0')(
~q.6 0.00
bO)
J
[2]
Calculate the efficiency of the solar panels, stating the equation you use.
e!C = 9.$~1
O\J~t.J.
= -=rqg oooJ
(Y\PvJ-
'-1 ~Cf6
efficiency
© UCLES 2012
0625/32/0/N/12
=
000
.\.6 %
XIOO
[2]
C.
13
(d)
Explain why solar energy is called renewable energy.
...................................
~.i.~~
~\\
&:t
f(r~:~.+.~
.('(ul\ ..1)~.). .
.....................................................
'O.e\Je.~ eu.&.)...................................................
(e)
State one disadvantage
..
For
Examiner's
Use
[1]
of using solar energy .
..
l)o~,.n~+
Luc.~.~ crl V\A~\+:
·····································'A'·df.\·····\·t'\·\.b:~.\Co.c;.t
of.
~V\ek
.
[1]
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[Total: 9]
© UCLES 2012
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[Turn over
14
A small object is placed 3.0cm from the centre of a convex lens of focal length 6.0cm. An
enlarged image is observed from the other side of the lens.
(a)
For
Examiner's
Use
On Fig. 7.1, draw a ray diagram to show the formation of this image.
lG
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7
Fig. 7.1
(b)
(i)
State why this type of image is called virtual .
.........
~~Ca~.~ot
..be..fn('"et:L.on
s.~(.tt.~I
bLc.
t~~
o.'4.~..i~.1ir ..~ ..ib.
E
.d.iv&'~i'j..
(ii)
a~
.
[1]
State the common name given to a convex lens used in this manner.
an
y
.....................
H~I);55'
..EFSS
....................•..............................
[1[
[Total: 5]
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© UCLES 2012
[3]
0625/32/0/N/12
15
8
(a)
A student rubs one side of an inflated balloon on her hair. This side of the balloon
becomes positively charged. Explain this.
...........
Rubb.i~ ~~."e..
...........
'-We'"
hq.u.O~
~~.J cMa('~
~~.~.~
t-O···· ·hrttr····.~COY.lL.S
.
.
~
......................... ~
For
Examiner's
Use
[2]
(b) The charged side of the balloon is now brought close to a stream of water flowing from
a pipe. The original position of the stream of water is shown in Fig. 8.1.
On Fig. 8.1, write in the boxes to indicate how each side of the stream of water is
electrically charged.
y
Choose your answer in each case from: positive, negative or neutral.
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PiPe~111
~ ~stream
of water
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l-
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balloon
Fig.8.1
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On Fig. 8.1, draw the new position of the stream of water. Explain this new position .
an
(c)
[2]
.........................
Stre.arn
H
....ba.c
,
<Ml~.ct"' ~
(d)
.
:~... .
.....··neaan~~'~cac-""""
.........................~
r.;a.ht..
.
i.~ wA"«:
C.ha.("7f".(
O()
S.~r:n
\oa'.lQ.Q.~
<rltYaeJr:tJ
[2]
Explain why rubbing one side of a metal sphere does not cause it to become charged .
...................
He.t.Cl(J ~.r.t gao.d ~Y\~d"or.
...................................
~ {t.t~ ~t!
elr.~.~
.
...•...................................
[1]
[Total: 7]
© UCLES 2012
0625/32/0/N/12
[Turn over
16
Fig. 9.1 shows an experiment carried out in a vacuum to investigate
a-particles and y-rays in a rnaqnetic.field.
radioactive source
emitting a-particles
and y-rays
lead cylinder
with small hole
Fig. 9.1
For
Examiner's
Use
y
thin beam of
a-particles and
y-rays
Complete the table to describe the deflection, if any, of the a-particles
the magnetic field shown. Place one tick in each column.
a-particles
possible deflection
and the y-rays in
y-rays
V
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no deflection
of
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(a)
the deflection
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9
towards N pole of magnet
E
l-
towards S pole of magnet
out of paper
V
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into paper
[3]
(b) The experiment of Fig. 9.1 was carried out in a vacuum.
State the effect of carrying out the experiment in air .
W.il' J.:e sf.o~
(w.'\. Co.n+i.t\.V~
b, ~
.
.(ctA'r: ..\.~.C\.l.u.·~1··qjpM)
H
......................cX
.......................~
.....................................................................................................................................
(c)
[2]
State and explain the purpose of the lead cylinder .
....................
l.ead
C(.~$O.(..bS y-~olJ~\;:)n
:
.
0ll1~&t....L!('¥i.HliMIN~{(!~
........................................................ .\{l4S5.
[2]
[Total: 7]
© UCLES 2012
0625/32/0/N/12
17
(a)
Determine which one of the following resistors, connected in. parallel with a 24.0 Q
resistor, would give a total resistance of 8.0 Q. Show your working.
Available resistors:
I
'RT
-.L
g
\
I~
::
-
l.+L
'R,
~2.
..L~L
2.4
RL
.14 + R2
'lR 2. =-
- s -2:tr Rl
(i)
24
2. Q:z. ~
+ R'L
2.'-\
.l2
value of resistor =
(b)
For
Examiner's
Use
2.0Q, 4.0Q, 6.0Q, 8.0Q, 12.0Q, 16.0Q, 18.0Q, 32.0Q
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10
~
[3]
In the space below, draw the parallel combination of resistors from (a) connected in
a circuit with a 6.0V battery. The circuit should also include an ammeter to measure
the current in the 24.0 Q resistor.
,v~
,.... / r--t
--~
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r------f
E
24..n
y
Calculate the current in each of the resistors when connected
your working.
.
H
an
(ii)
[2]
as in (b)(i). Show
};:.v/R
T
.= ~
I~~
12..
_
O. '2S
A
_ 0.5 A-
current in 24.0Q resistor =
current in the other resistor =
O.~.QS A:
O
5 .f.\
.
.
[3]
[Total: 8]
© UCLES 2012
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[Turn over
18
11
A student carries out an experiment with the circuit shown in Fig. 11.1. The component in the
dashed box labelled X is a diode.
X
3.0Q
A
3.0Q
,
,
,
,
1
_
,
Fig.11.1
On Fig. 11.1, draw the correct symbol for a diode, connected either way round, in the
dashed box labelled X.
[1]
(b)
(i)
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(a)
+ 6.0V is applied to point A, OV to point B.
State what the student observes on the ammeter .
.............
.~..~H~c*l~"-f\
(ii)
-6.0V
is applied to point A, OV to point B.
.
"'<E--
State what the student observes on the ammeter .
...............
N..
(c)
d.c.t.f t..c:bb~
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f)
.
[2]
The voltage shown in Fig. 11.2 is applied to the point A of the circuit in Fig. 11.1. Point B
is kept at 0 V.
E
On Fig. 11.2, draw a graph of the readings indicated by the voltmeter.
y
10
an
5
--
H
V/V
tis
5
10
Fig.11.2
[2]
© UCLES 2012
0625f32fOfNf12
For
Examiner's
Use
19
(d) The circuit shown in Fig. 11.3 contains two switches 81 and 82 and two indicator lamps
L1 and L2·
81
~
L1
-rI
I
--'--
82
ez
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L2
Fig.11.3
(ii)
~.VlS..;J.f9.c
Name component Z
switch 81
open
switch 82
lamp
L1
lamp
L2
closed
otf
ofF
open
OVl
00
E
closed
[2]
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[Total: 8]
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© UCLES 2012
[1]
Complete the table to state whether the lamps are on or off with the switches in the
positions stated.
.
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(i)
0625/32/0/N/12
For
Examiner's
Use