REPUBLIQUE DU CAMEROUN REPUBLIC OF CAMEROON
Paix-Travail-Patrie Peace-Work-Fatherland
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MINITERE DE L’ENSEIGNEMENT SECONDAIRE MINISRY OF SECONDARY EDUCATION
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REGIONAL DELEGATION FOR THE
DELEGATION REGIONALE DU CENTRE
CENTER
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DELEGATION DEPARTEMENTALE DU MFOUNDI DIVISIONAL DELEGATION OF MFOUNDI
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LYCEE BILINGUE DE MIMBOMAN GBHS MIMBOMAN
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Année Scolaire : 2023 / 2024 Academic Year: 2023 / 2024
SECTION A
INSTRUCTIONS; MARK AN (X) ON THE CORRECT LETTER CORRESPONDING TO THE
CORRECT ANSWER
1. It is used for measuring rapidly changing temperatures
A) Thermocouple
B) Vapour pressure thermometer
C) Gas thermometer
D) Maximum resistance thermometer
2. In a liquid in gas thermometer, when the bulb comes in contact with a hot object, the liquid inside
it;
A) Expand
B) Contracts
C) Remain the same
D) None of the above
3. The latent heat of vapourization of a substance is always;
A) Greater than its latent heat of fusion
B) Greater than its latent heat of sublimation
C) Equal to its latent heat of sublimation
D) Less than its latent heat of fusion
4. 540g of water 0°C is mixed with 540g of water at 80°C. The final temperature of the mixture is;
A) 40°C
B) 0°C
C) 80°C
D) Less than 0°C
5. Water is used to cool radiators of engines because;
A) Of its lower density
B) Its easily available
C) It’s cheap
D) It has high specific heat capacity
6. How much heat energy is gained when 5kg of water at 20°C is brought to its boiling point?
(Cwater=4200J/kgK)
A) 1680KJ
B) 1700KJ
C) 1720KJ
D) 1740KJ
7. When water is cooled to form ice, the mass of water should;
A) Increase
B) Remain the same
C) Decrease
D) First increase, then decrease.
8. Expansion during heating occurs only;
A) Occurs only in solids
B) Increases the weight of a material
C) Decreases the density of a material
D) Occurs at the same rate for all liquids and solids
9. When a bimetallic trip is heated, it;
A) Does not bend at all
B) Get twisted in the form of a helix
C) Bend in the form of an arc, with the more expandable metal outside
D) Bend in the form of an arc, with the more expandable metal inside
10. In cold countries, water pipes sometimes burst because;
A) Pipes contract
B) Water expands on freezing
C) When water freezes, pressure increases
D) When water freezes, it takes heat from the pipes
11. The temperature of pure boiling water at standard atmospheric pressure in Kelvin is;
A) 273
B) 373
C) 100
D) -237
12. Heat can travel through a vacuum by;
A) Convection only
B) Conduction only
C) Conduction, convection and radiation
D) Radiation only
13. The temperature of a body is 360K. What is the value in °C?
A) 87°C
B) 186°C
C) 273°C
D) 260°C
14. The latent heat of a substance:
A) Is the quantity of heat required to change its temperature by 1K when it changes from one
form to another.
B) Is the heat energy required to change the temperature of a unit mass of a substance through
1K.
C) Is the quantity of heat energy required to change the state of a substance without a change in
temperature.
D) Is the energy required to change the substance from one state to another with a change in
temperature.
15. Which of the following is not a longitudinal wave?
A) Ultrasonic wave
B) Infrasonic wave
C) Infrared wave
D) Siesmic wave
The waveform in the figure below is produced by an instrument vibrating at a frequency of 50Hz
connected to a cathode ray oscilloscope.
disp/cm w y
time/s
0.05
4cm x z
16. The amplitude of the wave is:
A) 4cm
B) 0.05cm
C) 2cm
D) 8cm
17. The period of oscillation of the wave is:
A) 50s
B) 2.5s
C) 0.01s
D) 0.02s
18. If the wave is travelling at a speed of 100m/s, the wavelength of the wave is :
A) 5000m
B) 150m
C) 2m
D) 0.5m
19. Two points in phase on the wave form are;
A) W and X
B) W and Y
C) W and Z
D) X and Y
20. The wave property that makes it possible for sound to be heard round a bend is ?
A) Diffraction
B) Reflection
C) Refraction
D) Interference
SECTION B
INSTRUCTIONS: ANSWER ALL.
1. Define the following and state their S.I units of measurements:
a)
i) Heat (2mark)
ii) Temperature (2marks)
iii) State two features on a clinical thermometer that makes it different from a
normal liquid-in-glass thermometer(2marks)
b)
i) Define thermal expansion (2marks)
ii) Explain how a bimetallic strip works in an electric iron to switch it on and
off. (3marks)
iii) Explain why a metal spoon, left beside a flame for a few minutes becomes
so hot to touch. (2marks)
2. Plane wave fronts are generated forms are generated from a source S in a ripple tank as
shown below. The tank is made up of three sections A,B and C. A is shallow, B and C are
deep water but B is separated from C by a barrier with a small opening than the spacing
of the wave fronts.
B
A C
Deep water Deep water
Shallow water
a) Copy all of the diagram and continue the waves to show what happens as the waves
pass through section B and C.(2marks)
b) Name the phenomenon taking place in B and C and explain the nature of each.
(4marks)
c) State a daily experience that shows that the speed of sound in air is less than the
speed of light in air. (1mark)
