Section A
1. Which of the following motions is uniform?
A. The swinging of a pendulum
B. The free-falling of a stone under gravity
C. The movement of a coin on a frictionless surface
D. The stopping motion of a moving MTR train
2. An astronaut travels from the earth to the moon. Which of the following statements is true?
A. His mass will increase
B. His weight will increase
C. His mass and weight will both decrease
D. His mass will remain unchanged but his weight will decrease
3. Which of the following graphs does not describe motion with uniform acceleration?
4. A ball is falling vertically under gravity. Assuming that air resistance is negligible, which of the following statements is/are correct?
(1) The acceleration of the ball is constant.
(2) The potential energy is conserved.
(3) The work done on the ball by gravitational force is increasing uniformly with time.
A. (1) only
B. (3) only
C. (1) and (2) only
D. (1) and (3) only
5. How long will a motor with an output power of 2000 W lift a 320kg container vertically upwards with uniforms speed for 26 m?
A. 4.2 s
B. 6.3 s
C. 29.8 s
D. 41.6 s
6. In the figure below, Peter and May are wearing rollers on their feet and they are holding a rope. When Peter pulls the rope,
A. Only May moves.
B. Only Peter moves.
C. Both of them move.
D. No one moves.
7. Which of the following can explain why a metal railing feels colder than a plastic railing?
(1) Metal is a good conductor of heat.
(2) The temperature of the metal railing is lower.
(3) The internal energy of the metal railing is lower.
A. (1) only
B. (1) and (2) only
C. (2) and (3) only
D. (1), (2) and (3)
8. Which of the following about evaporation and boiling of a liquid is/are correct?
(1) Evaporation occurs at a temperature below the boiling point of the liquid.
(2) Both processes release latent heat of vaporization.
(3) Both processes take place on the surface of the liquid.
A. (1) only
B. (1) and (2) only
C. (2) and (3) only
D. (1), (2) and (3)
9. A hot liquid is cooled down in a room with constant room temperature. The figure below shows the variation of the temperature of the liquid with time.
If the SAME hot liquid is cooled down under a LOWER room temperature, which of the following graphs (in dash lines) best shows the variation of the temperature of the liquid with time?
10. A student places a beaker of liquid on an electronic balance and heat the liquid to boiling with an immersion heater. When the liquid starts to boil, he records the reading of the balance. The reading of the balance reduces by 60 g after 10 minutes. The power output of the heater is 120 W. If 10 % of the energy supplied is lost to the surrounding, what is the specific latent heat of vaporization of the liquid?
A. 1080 J kg-1
B. 18000 J kg-1
C. 1080000 J kg-1
D. 1200000 J kg-1
11. The figure below shows a ray incident on a plane mirror. If the mirror is turned 60゜, what is the angle between the incident ray and the reflected ray?
A. 30゜
B. 60゜
C. 90゜
D. 120゜
12. Which of the following diagram shows correctly the dispersion of white light by a glass prism?
13. If an object placed at the focus of a concave lens is moved away from it, the image will
(1) become real.
(2) be smaller.
(3) move towards the lens.
A. (2) only
B. (3) only
C. (1) and (2) only
D. (1) and (3) only
14. Which of the following statements about a longitudinal wave is/are correct?
(1) The particles vibrate with the same frequency.
(2) The particles vibrate along the direction of propagation of the wave.
(3) Two particles separated by half of a wavelength are always moving in opposite directions.
A. (2) only
B. (1) and (2) only
C. (2) and (3) only
D. (1), (2) and (3)
15. A vibrator sets up a wave traveling along a long piece of string. Which of the following statements is correct?
A. Particle A is moving towards the right.
B. Particle B is moving up.
C. Particle C is instantaneously at rest.
D. Particle D is moving down.
16. A circular pulse diffracted from a small hole is about to strike a straight barrier, as shown in the figure below.
Which of the following diagrams shows correctly the reflected pulse?
17. Which of the following is NOT an application of microwave?
A. Food cooking
B. Remote controls
C. Telecommunications
D. Radar
18. Two charged conducting spheres A and B are suspended as shown in the figure below. If they are in equilibrium, which of the following statements must be correct?
(1) They both carry positive charge.
(2) The electrostatic force on A is greater than that on B.
(3) The weight of A is less than that of B.
A. (1) only
B. (3) only
C. (1) and (2) only
D. (2) and (3) only
The circuit diagram shown below is for question 19 and 20. The four light bulbs are identical and obey Ohm’s law.
19. What is the ratio of the power L1 to that of L4?
A. 2 : 1
B. 3 : 2
C. 5 : 3
D. 9 : 4
20. If L4 is blown out, which of the following statements is/are correct?
(1) L1 will be brighter.
(2) L2 will be brighter.
(3) L3 will be dimmer.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
21. The figure below shows a current-carrying wire. At which of the positions is the strenhth of the magnetic field strongest and pointing out of the paper?
A. P
B. Q
C. R
D. S
22. The diagram below shows the cross-section of a current-carrying wire placed in a magnetic field set up between the poles of a U-shape magnet. The current is flowing out of the paper. The direction of the force acting on the wire is
A. to the right.
B. to the left.
C. upwards.
D. downwards
23. The table below shows the count rate recorded when different materials are inserted between a radioactive source and a GM tube placed very near to each other.
Which type(s) of radiation does the source emit?
(1) Alpha particles
(2) Beta particles
(3) Gamma rays
A. (1) only
B. (1) and (2) only
C. (2) and (3) only
D. (1), (2) and (3)
24. A radioactive nuclide X undergoes two Alpha-decays and two Beta-decays to form nuclide Y. Which of the following notations represents nuclide Y correctly?
25. At time t = 0, a sample of radioactive nuclide is placed in front of a GM tube and counter shows a count rate of 400 counts per minute. The set up is left for 10 days. It is known that the half life of the radioactive nuclide is 5 days and the background count rate is 80 counts per minute. What is the most probable reading of the GM counter after 10 days?
B. 80 counts per minute
C. 100 counts per minute
D. 160 counts per minute
E. 180 counts per minute
1st statement / 2nd statement26.
Wet clothes hanging in wind dries up quickly. / The wind helps to remove the energetic water molecules escaped from the water on the clothes.27.
The speed of ultraviolet radiation in space is higher than that of radio wave. / The frequency of ultraviolet radiation is higher than that of radio waveSection B
28. An object of mass 2 kg is under the action of two forces which are perpendicular to each other. The magnitude of the two forces are 3.5 N and 5 N respectively. What is the acceleration of the object?
A. 0.75 ms-1
B. 3.05 ms-1
C. 4.25 ms-1
D. 18.7 ms-1
29. Which of the follow statement about the motion of an object is/are correct?
(1) Its velocity and acceleration are always in the same direction.
(2) Its acceleration is the change of its velocity.
(3) An object moving along a circular path must be accelerating.
A. (1) only
B. (3) only
C. (1) and (2) only
D. (2) and (3) only
30. In a head-on collision between a car and a large truck, which of the following is true?
A. The truck exerts a greater force on the car.
B. The car exerts a greater force on the truck.
C. Both exert forces of the same magnitude on each other.
D. The truck exerts a force on the car, but the car does not exert a force on the truck.
31. A block of mass 3 kg is pulled from rest by a force F of 4.5 N at an angle of 30゜to the horizontal as shown in the figure below. The friction between the block and the surface is known to be 1.3 N. How much work is done on the block by F after it has moved for 5 seconds?
A. 28 J
B. 32 J
C. 42 J
D. 49 J
32. A tennis ball of mass 0.1 kg traveling at 20 ms-1 is hit by a racquet and returns at a speed of 30 ms-1. If the ball is in contact with the racquet for 0.1s, find the impulse and the force exerted by the racquet on the ball.
Impulse / Ns Impulsive Force / N
A. 5 10
B. 5 50
C. 1 50
D. 1 10
33. Which of the following about convection current in air is/are correct?
(1) Temperature of air along the convection current is different.
(2) The density of air along the convection current is different.
(3) Air molecules transfer energy by collisions.
A. (2) only
B. (1) and (2) only
C. (1) and (3) only
D. (1), (2) and (3)
34. Which of the following about the function of the glass panes of a greenhouse is correct?
A. They prevent cold air outside from sinking into the greenhouse by convection.
B. They reduce the heat loss from the greenhouse by conduction.
C. They prevent long infrared waves from leaving the greenhouse.
D. They allow ultraviolet waves to enter the greenhouse.
35. A light ray P is totally reflected in a medium X as shown below. Which of the following statement(s) is/are correct?
(1) The angle a is greater than the critical angle.
(2) The refractive index of medium X is smaller than that of medium Y.
(3) The intensity of the light ray Q if angle a is further increased.
A. (1) only
B. (1) and (2) only
C. (2) and (3) only
D. (1), (2) and (3)
36. Which of the following physical quantities is measured in decibel (dB)?
A. Loudness
B. Pitch
C. Quality
D. Wavelength
37. In an interference pattern produced in an ripple tank, constructive interference can occur at more positions by
(1) increasing the separation of the two sources.
(2) increasing the water depth
(3) increasing the frequency of the vibrator.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
38. A pulse of ultrasound is sent vertically downward from a ship to the seabed. The echo is received after 30 ms If the speed of sound in water is 1500 ms-1, what is the depth of the sea under the ship?
A. 12.5 m
B. 22.5 m
C. 30 m
D. 45 m
39. A negatively charged plastic rod is brought near two neutral metal spheres on wooden stands and placed in contact as shown in the figure below.What will be the charges on the two spheres?
Sphere P Sphere Q
A. Negative Positve
B. Negative Neutral
C. Positive Negative
D. Positive Neutral
40. If the resistance R is about 20 Ω, which of the following circuit is most suitable for measuring its resistance?
41. A copper ring is dropped over a bar magnet and passes through it as shown in the diagram below.
Which of the following statement(s) is/are correct?
(1) As seen by the observer, the induced current in the ring flows in the anti-clockwise direction and then in the clockwise direction.
(2) When ring is a just above the magnet, its acceleration is greater than g.
(3) Heat is produced in the ring.
A. (2) only
B. (3) only
C. (1) and (2) only
D. (1) and (3) only
42. A metal rod XY is being pulled along a conducting wire inside a magnetic field by a force F as shown in the diagram below. The magnetic field is pointing into the paper.
Which of the following statement(s) is/are correct?
(1) An induced current flows from X to Y through the metal rod.
(2) X is at higher potential than Y.
(3) The resultant force on the metal rod XY is F.
A. (2) only
B. (3) only
C. (1) and (2) only
D. (1) and (3) only
43. The graph below shows the variation of the output voltage of a generator with time.