rESr coDE 012380 2A
"FORM TP 2023026
"IANUARY 2023
CARIBBEAN EXAMINATIONS COUNCIL
CARIBBEAN SECONDARY EDUCATION CERTIFICATE@
EXAMINATIOi{
PHYSICS
Paper 02 * General Proficiency
2 hours 30 minutes
READ THE FOLLOWING INSTRUCTIONS CAREFULLY.
1.
This paper consists of SIX questions in TWO sections. Answer ALL questions.
2.
Write your answers in the spaces provided in this booklet.
3.
Do NOT write in the margins.
4.
Where appropriate, ALL WORKING MUST BE SHOWN in this booklet.
5.
You may use a silent, non-programmable calculator to answer questions, but
you should note that the use of an inappropriate number of significant figures in
answers will be penalized.
6.
If you need to rewrite any answer and there is not enough space to do so on the
original page, you must use the extra lined page(s) provided at the back of this
booklet. Remember to draw a line through your original answer.
7.
If you use the extra page(s) you MUST write the question number clearly in
the box provided at the top of the extra page(s) and, where relevant, include
the question part beside the answer.
DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SO.
Copyright @ 2A21 Caribbean Examinations Council
All rights reserved.
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SECTION A
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AnswerALL questions'
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1.
(a)
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Define the 'period of a simple pendulum'.
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(b)
Table 1 shows the results of an experiment to find the relationship between the length of
a string, /, and the period of the pendulum, 7.
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TABLEI.:LENGTHOF'STRING,/,ANDCORRESPONDING
PERIOD VALUES OFA SIMPLE PENDULUM, F
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Length of String, I
(m)
Period, 7'
0.15
0.77
4.25
0.q9
(s)
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Period?, 7'2
(s')
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0.35
1.15
0.45
1.34
0.55
1.48
0.65
1.62
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1.7s
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State the independent (manipulated) variable in this experiment.
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(1 mark)
(ii) complete Table 1 by inserting the Period2, 7? values in column 3.
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(4 marks)
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(iiD
using the grid provided in Figure 1 on page 5, plot a graph of Period, P versus
(8 marks)
length,
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GO ON TO THE NEXT PA GE
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01238020IJ|CSEC2023
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Figure 1. Craph of Period2, f'versus length, /
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01238020/ItcsBc 2023
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-6Calculate the gradient, S, of the graph on page 5'
(6 marks)
(d)
Given that S - 4 filg, calculate the acceleration due to gravity, g.
(4 marks)
Total25 marks
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012380201I1CSEC 2023
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-7 2.
(a)
Complete the following statements by f,lling in the blanks with the correct word or phrase.
(i)
The formula for pressure is given by .............
Its SI unit is .....".........
(ii)
or..............
In fluids, pressure at all points on the same horizontal level is ...............
and pressure increases as the
increases.
(iii)
An object will float in a fluid when the
ontheobjectisequaltothe.........
oftheobject.
(7 marks)
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GO ON TO THE NEXT PAGE
01238020/IICSEC 2023
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(b)
Figure 2 shows a shipwreckwhich is fully submerged at the bottom of the Caribbean Sea.
The liquid pressure on the top surface of the shipwreck is 430 kPa.
Figure 2. Shipwreck submerged in the Caribbean Sea
(i)
Calculate the depth of the shipwreck below the surface of the sea, given that
g: 10 N kg-1, atmospheric pressure is i00 kPa and the density of sea water is
1025 kg m-3.
(4 marks)
GO ON TO THE NEXT PA CE
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01238020 /JtcSEC 2023
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(ii)
Calculate the total pressure on the top surface of the shipwreck.
(1 mark)
(iii)
A hatch door on the top surface of the shipwreck has an area of 0.60 m2.
Calculate the downward force on the hatch door due to the total pressure on the
top surface of the shipwreck.
(3 marks)
Total 15 marks
GO ON TO THE NE,XT PAGE
0 i238020/JicsEC' 2023
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Figure 3 shows the section of a white plastic pipe through which water
the pipe is heated bY the sun.
3.
Waterin\
is flowing' The water in
$
\
\'Water out
White plastic PiPe
Figure 3. Device for heating water
(a)
(i)
Describe how thermal energy is transferred from the sun to the water
pipe.
inside the
a;;;)
(ii)
SuggestTWo ways in which the efficiency of the thermal energy absorbed by the
water in the pipe maY be increased.
(2 marks)
GO ON TO THE NE,XT PA CE
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0123s0201JICSEC 2023
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(b)
Rachelle used a metal spoon to stir a hot liquid in a cup as shown in Figure 4.
Hot liquid
Figure 4. Metat spoon in a cup containing a hot liquid
(i)
After a short time, Rachelle observed that the metal spoon felt hot. Describe the
TWO ways in which thermal energy is conducted through the metal spoon at the
molecular level.
(3 marks)
(ii)
The metal spoon was replaced by a wooden spoon. Rachelle obsened that the
wooden spoon did not feel hot. Explain why the wooden spoon did not feel hot.
(2 marks)
CO ON 'IO TT{E NEXTPACF]
0l 238020lI1CSEC 2023
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-12(c)
A thermometer is placed in a plastic cup containing 200 g of water and gives a reading
is
of 22 "C. Small pi"*", of ice at OoC are added to the water one by one' The mixture
temperature
the
until
repeated
was
process
stirred after each addition until the ice melts. The
oC. The total mass of ice added to the water was
recorded by the thermometer was 0
6o g.
(i)
Calculate the thermal energy lost by the original volume of water in the beakeq
oC-1'
given that the specific heat capacity of water is 4'2 J g-r
(3 marks)
(ii)
Assume that all the thermal energy lost by the original volume of water in the
beaker is transferred to the ice. Calculate the specific latent heat of fusion of ice.
(3 marks)
Total L5 marks
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01238020tltCSEC 2a23
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- 13 SECTION B
AnswerALL questions.
(a)
4.
Name the electromagnetic waves in EACH of the regions labelled A, B and C in the
electromagnetic spectrum shown in Figure 5.
Visible light
Figure 5. Blectromagnetic Spectrum
A
B
C
(3 marks)
(b)
Figure 6 represents some wavefronts approaching a barrier with a naruow gap, which is
smaller than the wavelength of the wave. On Figure 6, draw THREE wavefronts after
they have passed through the narrow gap.
Barrier with
narrow gap
Figure 6. Wavefronts approaching a barrierr+,ith a narrolv gap
(2 marks)
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at2 38020/J/CSEC 2023
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Define the term'refractive index'of glass.
(3 marks)
(d)
Figure 7 shows a ray of red light incident on the face XY of a glass prism at point S. The
path of the ray is shown in the diagram. The refractive index, n, of the glass for red light
is 1.5.
Figure 7. Ray of red light passing through a glass prism
(i)
Calculate the angle of refraction in the glass at S.
(3 marks)
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01238020/JICSEC2a23
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(ii)
Calculate the critical angle, c, for glass to air.
(3 marks)
(iii)
Identifu the critical angle, c, in Figure 7 on page 14.
(1 mark)
Total 15 marks
GO ON TO THE NEX.T PACtr
01238020t1/CSEC 2023
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(a)
Define the term 'electric field'
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(b)
(i)
Figure 8 shows a positively charged sphere which is attached to an insulated stand'
Draw amows to indicate the pattem and direction of the electric field in the region
surrounding the sPhere.
Figure 8. Positively' charged sphere
(2 marks)
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01238020 |JTCSEC 2a23
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(ii)
A smaller, uncharged metal sphere, Q, is suspended by a cotton thread and brought
close to the positively charged sphere as shown in Figure 9.
Draw the distribution of charge on Sphere Q.
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+
+
+
+
o
Figure 9. Positively charged sphere and metal sphere, Q
(2 marhs)
GO O}] TO THE NEX]] PAGE
012 38020/J/CSEC 2023
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-18(iii)AnearthwirewasbrieflybroughtintocontactwithsphereQ,asshownin
Figure 10, and then removed'
Figure 10. Positively charged sphere and
Describe what happens in the wire and
metal sphere, Q, with earth wire
state the flnal charge on Q'
(2 marks)
CO ON TO TI.IE NEXT PA GE
; 01238020A1CSEC 2023
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-19(c)
(i)
The battery in an electric car can be charged by passing a current of 1 1 Athrough
it. Calculate the charge stored in the battery after 8 hours.
(4 rnarks)
(ii)
Calculate the resistance of the batery given that the voltage used is 220 V.
(3rmarks)
Total 15,marks
GO ON TO THE NEXT PAGE
012 38020/J/CSEC 2A23
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6.
Complete Table 2 by inserting the types of radioactive emissions and their properties.
TABLE2:RADIOACTIVEEMISSIONSANDPROPERTIES
Itadioactive
Emissions
l\ature
Electromagnetic
radiation
Froperties
Range in Air
Several kilontetres
1 sheet ofpaper
Helium nucleus
E,lectrorr
Stopped B1-
A few metres
(3 marks)
(b)
Deflne the term 'isotoPes'
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(c)
(p)
The structure of the atom of an elementY, showing the number of neutrons (n), protons
and electrons (e), is represented in Figure 1 1.
5p
6n
Figure 11. Structure of atom of Element Y
(i)
State the mass number and atomic number of this atom'
Mass number ..............
Atomic number
(2 marks)
GO ON TO THE NEXT PA GE,
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01238020tItCsF.C2023
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-2t (ii)
Write the symbol for another possible isotope of Element Y.
(1 mark)
(d)
(i)
A polonium-210 nucleus decays by u-particle emission to a lead (Pb) nucleus.
Complete the equation for the decay of polonium-210.
1?'".-'
(3 marks)
(ii)
Polonium-210hasahalf-lifeof i3Sdays.Atacertaintime,asamplecontains6.4x
106
polonium nuclei. Calculate the number ofpolonium nuclei remaining after 552 days.
(3 marks)
Total 15 marks
END OF TEST
IF YOU FINISH BEFORE TIME IS CALLED, CHECK YOUR WORK ON THIS TEST.
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