# 中五 物理試卷 (F5 Physics Past Paper)

6656

pdf

30

Y_HY1516_S5

▼ 圖片只作預覽, 如欲下載整份卷, 請按「免費成為會員」 ▼
▲ 圖片只作預覽, 如欲下載整份卷, 請按「免費成為會員」 ▲

## 中五物理試卷 PDF 下載

General Instructions:
1. There are TWO sections, A and B, in this paper. Section A (40 marks) consists of multiple-choice
questions, while Section B (60 marks) contains conventional questions.
2. Answers to Section A should be written on the MC answer sheet provided.
3. Answers to Section B should be written on the answer book provided.
5. The diagrams are NOT necessarily drawn to scale.
6. Take the acceleration due to gravity to be 10 m s²².
7. Neglect air resistance.
8. Unless otherwise specified in the question, numerical answers should be either in exact value or
correct to three significant figures.
(a) For uniformly accelerated motion:
v² = u² + 2as
(b) Equation for single lens:
Belilios Public School
Half-yearly Examination, 2015-2016
Time Allowed: 2 hours
Maximum Marks: 100
Useful Formulae
25. Which of the following shows the correct order of five electromagnetic waves arranged in the
order of decreasing frequency?
A X-rays, infra-red, microwaves, radio waves, ultra-violet
Ultra-violet, infra-red, radio waves, X-rays, microwaves
Radio waves, microwaves, ultra-violet, infra-red, X-rays
D X-rays, ultra-violet, infra-red, microwaves, radio waves
26. If monochromatic light is directed perpendicularly at a plane transmission grating, what is the
path difference between the light waves from two adjacent slits at the first order bright fringe?
27. When a light wave passes through a narrow slit, which of the following wave properties
remain(s) unchanged?
(1) Frequency
(3) Wavelength
(2) and (3) only
(1), (2) and (3)
28. Which of the following are the key evidences showing light as a kind of wave?
(1) When light is reflected, its angle of incidence equals its angle of reflection.
(2) When light passes a narrow slit, it spreads into the shadow of the slit.
(3) Fringes can be observed when light passes two narrow slits close to each other.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
29. It is difficult to observe diffraction of light in daily life. Which of the following is/are the
(1) The wavelength of visible light is very short.
(2) The light rays that we see in daily life have various wavelengths.
The speed of light is very high.
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
30. In a Young's slits experiment, the separation between the fringes is increased by increasing
(1) the distance between the slits and the screen.
(2) the slit separation.
(3) the wavelength of the light.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
31. Which of the following statements about sound are correct?
(1) Sound is a kind of longitudinal wave.
(2) The speed of sound in air is higher than that in water.
(3) Sound is produced by vibrations.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
32. The following figure shows a longitudinal wave.
travelling direction
D P, R and T
Which of the following pair of particles are in antiphase?
travelling direction.
33. The following figure shows a longitudinal wave travelling in a medium at different time.
At t = 0.1 s, which particle(s) move(s) at the highest speed?
34. Which of the following are the differences between ultrasonic waves and microwaves?
(1) Microwaves are electromagnetic waves but ultrasonic waves are sound waves.
(2) Microwaves can travel through a vacuum but ultrasonic waves cannot.
(3) Microwaves are transverse waves but ultrasonic waves are longitudinal waves.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
35. Leo is singing inside a house. Joey is standing outside the house and cannot see Leo, but she can
still hear his singing. Which of the following wave phenomenon is responsible for this
36. The following figures show the waveform of four different musical notes shown on a CRO. The
settings of the CRO remain unchanged. Which note has the highest loudness?
A Reflection
B Refraction
C Interference
D Diffraction
Directions :
Each question below consists of two statements. Decide whether each of the two
statements is true or false. If both are true, then decide whether or not the second statement is a
correct explanation of the first statement. Then select one option A, B, C or D according to the
following table:
The 2nd statement is a correct explanation of the 1st statement.
The 2nd statement is not a correct explanation of the 1st statement.
1st statement
A wave of frequency 50 Hz always
takes 2 s to travel 100 m.
Destructive interference occurs when
a crest of a wave meet a trough of
another wave.
Light is a transverse wave.
Sound travels at about 340 m s-¹. in
The speed of a wave is equal to the
product of the frequency and the
wavelength.
When a crest meets a trough, the path
difference at that point must be equal to
2nd statement
Light can travel through a vacuum.
End of Section A
Questions for Section B are printed on the Answer Book.
Air particles travels at about 340 m s¹ in
a sound wave.
General Instructions:
1. There are TWO sections, A and B, in this paper. Section A (40 marks) consists of multiple-choice
questions, while Section B (60 marks) contains conventional questions.
2. Answers to Section A should be written on the MC answer sheet provided.
3. Answers to Section B should be written on the answer book provided.
5. The diagrams are NOT necessarily drawn to scale.
6. Take the acceleration due to gravity to be 10 m s².
7. Neglect air resistance.
8. Unless otherwise specified in the question, numerical answers should be either in exact value or
correct to three significant figures.
(a) For uniformly accelerated motion:
(b) Equation for single lens:
Belilios Public School
Half-yearly Examination, 2015-2016
Time Allowed: 2 hours
Maximum Marks: 100
Useful Formulae
SECTION B CONVENTIONAL QUESTIONS
Instructions for Section B
1. This section carries 60 marks.
3. All workings must be shown clearly.
Question No.
(b) Find the angular speed of Jack.
Jack takes a ride on the 'Flying Swing' as shown. His mass is 50 kg. The length of the rope (L)
is 6 m. The mass of the chair is 20 kg. The bottom of the chair is 1 m above the ground when it
is at rest. The 'Flying Swing' completes a rotation in 4.53 s. The horizontal distance between
Jack and the rotation axis (r) is 3 m.
Assume that the mass of the rope is negligible. Take the acceleration due to gravity as 10 m s¹.
(a) State the forces acting on Jack when the 'Flying Swing' is rotating.
(c) Find the linear speed of Jack.
(d) Find the tension in the rope.
(e) If the 'Flying Swing' rotates 1.5 times as fast as it does at the beginning, what will be the
tension in the rope?
A 3-kg ball is thrown horizontally from a height of 10 m on a planet. 2 s later the ball reaches
the ground with a displacement of 16 m in the horizontal direction. The universal gravitational
constant G is 6.67 × 10-¹¹ N m² kg 2.
(a) What is the acceleration due to gravity near the surface of the planet? Hence, find the
gravitational field strength near the surface of the planet.
(b) Find the initial kinetic energy of the ball.
(c) Suppose the mass of the planet is 2.43 × 1023 kg.
(i) Find the radius of the planet.
(ii) If a satellite orbits around the planet just above its surface, find the period of the
The figure below (Fig a) shows a transverse wave of frequency 2 Hz traveling along a string to
the right at t = 0. The separation between two adjacent crests of the wave is 4 cm. The vertical
distance between a crest and a trough is 6 cm.
SECTION A MULTIPLE-CHOICE QUESTIONS
Instructions for Section A
1. There are 40 questions.
2. This section carries 40 marks.
3. All questions carry equal marks.
4. No marks will be deducted for wrong answers.
An object performs uniform circular motion. Which of the following statements about the object
is correct?
The velocity of the object does not change.
The speed of the object does not change.
The acceleration of the object is always zero.
The motion of the object does not obey Newton's laws.
A geostationary satellite orbits around the earth with a constant speed along a circular trajectory.
Which of the following quantities is/are not constant?
(1) Acceleration of the satellite
(2) Period of the satellite
(3) Centripetal force acting on the satellite
(1) and (3) only
(1), (2) and (3)
In a cycling training, a bicycle travels along a circular track of radius 30 m at a constant speed
of 9.42 m s¹. What is the period of the bicycle?
(i) its amplitude,
(ii) its period,
(iii) its speed.
displacement / cm
(b) A and B are two particles on the string separated by 2 cm.
(i) Sketch the displacement-time graph for particle A from t = 0 to t = 1 s in Figure b.
displacement / cm
(ii) Sketch the displacement-time graph for particle B from t = 0 to t = 1 s in Figure c.
(c) What is the phase relationship between particle A and B?
This question is about a ripple tank experiment.
(a) The figure below (Fig 4a) shows a water wave in a ripple tank travelling across a boundary
PQ from region A to region B. The wavelength of the wave in region A is 0.05 m while that
in region B is 0.03 m.
(ii) Which region, A or B, is deeper?
(i) Describe briefly how to set up two regions of different depths in a ripple tank.
(iii) If the frequency of the wave in region A is 10 Hz, what is the speed of the wave in
each region?
(b) Next, a barrier with an opening is set in region B. Figure 4b shows the water wave
travelling towards the opening of the barrier.
(i) Sketch the wave pattern formed on the other side of the barrier. (2 marks)
(ii) Name this wave phenomenon.
(c) Then, the width of the gap is increased as shown in Figure 4c. Draw the wave pattern
formed on the other side of the barrier.
A student uses the following set-up to find the wavelength of a laser beam.
The laser beam is shone normally on a plane transmission grating which has ruling of 100 lines
per mm. An interference pattern appears on a screen 0.5 m behind the grating. The student
records the separation x between two bright fringes of the same order in the following table.
Order of fringe, n
(a) State one safety precaution of using laser.
(b) Complete the table above.
(c) Estimate the wavelength of the laser.
(d) The width of the screen is 50 cm. Find the highest order of bright fringe shown on the
Two identical loudspeakers L₁ and L2 are connected to a signal generator. Sound of frequency
300 Hz is produced. Peter stands in front of the loudspeakers such that the distance between him
and the loudspeakers are 8.25 m and 5.50 m respectively. The speed of sound in air is 330 m s¹.
(a) Find the wavelength of the sound emitted by the loudspeakers. (2 marks)
(b) Explain whether Peter will hear a loud sound or a soft sound. (4 marks)
(c) The set-up now generates sound of frequencies 150 Hz at the same output volume. How
does the loundness of sound that Peter hears? Explain briefly. (4 marks)
End of Paper

2 December 2015

USE AN HB PENCIL ONLY
Wrong marks should be completely
erased with a clean rubber.
DO NOT FOLD THIS SHEET
HNM & No oi
Marking Scheme for section A
Half-yearly Exam.
A B P S H K C D E F
0 1 2 3 4 5 6 7 8 9
| | | | | | | ||
| | | | | | | | ||
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0
☐ ☐ ☐ 0 0 0 0 0 0 0
Secondary 5
(a) His weight
(b) Angular speed of Jack
CONVENTIONAL QUESTIONS
and normal reaction by the seat
Belilios Public School
Half-yearly Examination, 2015-2016
Marking Scheme
.. The tension is 808 N.
(c) Linear speed of Jack = r@
= 3 x 1.387
= 4.16 m s¹
(d) Horizontal component of tension = centripetal force
T sin 0 = mro²
(e) From (d),
= (50 +20) × (1.5 x 1.387)² x 6
(50+20) × 3 × 1.387²
Time Allowed: 2 hours
Maximum Marks: 100
(a) Take the downward direction as positive.
In the vertical direction,
by s = ut +-at²
10 = 0 + ×a×2²
The acceleration due to gravity near the surface of the planet is equal
to the acceleration due to gravity in magnitude, i.e. 5 N kg ².
(b) Initial speed of the ball =
(c) (i) By g =
Initial kinetic energy of the ball =
(ii) By a = ra²,
Period of the satellite =
6.67 × 10-11 x 2.43 × 10²3
= 1.80 x 106 m
(ii) Period =
(iii) Speed = fa
(c) In antiphase
displacement / cm
(Correct shape)
(Correct amplitude)
displacement / cm
(Correct shape)
(No wave before 0.25 s)
Place a sheet of Perspex/glass plate in the ripple tank to
produce a shallow region.
By v = fλ,
speed of waves in region A = 10 x 0.05
speed of waves in region B = 10 x 0.03 0.3 m s
(Correct shape of the wave)
(Wavelength unchanged)
(ii) Diffraction
(Correct shape of the wave)
(Diffraction less prominent)
In the following figure, A and B are two identical balls. They are fixed on a rod and rotating
with it. The distances of the balls A and B from centre O are R₁ and R₂ respectively. What is the
ratio of the angular speed of A to that of B?
A man is riding inside a 'rotor' of radius 3.5 m. The man rotates at an angular speed of
2.8 rad s ¹. What is his centripetal acceleration?
When a plane makes a turning, it tilts so that
air resistance is reduced.
the plane can moves upwards.
part of the lifting force provides the centripetal force.
oil consumption is reduced.
Which of the following statement about gravitational force is correct?
A Gravitational force only exits between stars and planets.
B Centripetal forces are always provided by gravitational forces.
C Gravitational forces exist between every two objects.
The gravitational force acting on the Earth by the Sun is larger than the gravitational force
acting on the Sun by the Earth.
(a) Do not direct the laser beam to the eyes.
0:3.26°, 6.56°, 9.87°, 13.2°
λ: 568, 571, 571, 570
(c) Wavelength
By d sin = nλ,
(a) By v = fx,
570×10-⁹
.. The highest order is 7.
568 +571+571+570
(c) Wavelength
x sin 26.57°
(b) Path difference at Peter's position = 8.25 -5.50 = 2.75 m
Destructive interference occurs
and he will hear a soft sound.
Path difference = 2.75 m = 1.25%
Destructive interference no longer occurs
and so he will hear a louder sound.
End of Paper
The figure below is about the field pattern of the Earth. Which of the following statements is
(1) The field lines point towards the Earth. This means the gravitational force acting on the
objects by the Earth is towards the Earth.
(2) The field lines are denser when it is closer to the ground. This means the gravitational field
strength near the Earth's surface is larger than that in the space.
(3) The positions with equal field line density have the same gravitational field strength.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
A and B are two planets. The masses of A and B are is M₁ and M2 respectively and the radii of A
and B are R₁ and R2 respectively. Two identical objects are placed on the surface of the two
planets. What is the ratio of the gravitational force acting on the object on A to that on B?
10. An object is put on the surface of the Moon and then on the Earth. Which of the following
statements is incorrect?
The object has inertia in both places.
The mass of the object is smaller on the Moon than on the Earth.
If a force is applied on the object, the object will accelerate in both places.
The weight of the object is smaller on the Moon than on the Earth.
11. A man of mass 80 kg is 10 m away from a boy of 35 kg. What is the gravitational force between
them? Take G to be 6.67 × 10-¹¹ N m² kg-².
1.87 × 10-⁹ N
1.87 × 10-7 N
1.87 × 10-³ N
12. A satellite turns around a planet in a circular orbit with period T. If the distance between the
satellite and the centre of the planet is two times its original value, the period will become
13. The following figure shows a wave travelling towards the right along a string. Consider four
particles P, Q, R and S on the string.
Which particle(s) has/have the same amplitude as P?
14. Which of the following is the unit of frequency of a wave?
None of the above
15. A transverse wave travels along a string as shown in the following figure.
displacement / m
displacement / cm
If the frequency of the wave is 12 Hz, what is the speed of the wave?
16. The following figure shows the displacement-time graph of particle Q on a transverse travelling
travelling direction
1 cm above the current position
1 cm below the current position
2 cm below the current position
distance / m
Consider another particle P being half a wavelength ahead of Q. If it is t = 0 now, what is the
position of P after half a period?
A The current position
17. A travelling longitudinal wave is generated along a slinky spring at a frequency of 5 Hz. The
figure below shows the wave at a certain time instant.
direction of travel
llleeeees Ø
What is the speed of the wave?
1.25 m s-¹
2.5 m s¯¹
18. The figure below shows some particles on a transverse wave.
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
Which of the following statements is/are correct?
(1) Particles a and i vibrate in phase.
(2) Particles a and q vibrate in antiphase.
(3) Particles k and o vibrate in antiphase.
to the right
19. The waves produced by two coherent sources must have
(1) the same amplitude.
the same frequency.
a constant phase difference.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
20. In the following figure, two pulses travel along a string.
Which of the following figures best shows their overlapped waveform?
21. In a ripple experiment, a water wave travels towards a shallow region.
Which of the following quantities of the wave would remain unchanged after the wave enters
the shallow region?
A Wavelength
All of the above
An elastic string stretched to 1 m long is fixed with one end to a vibrator and the other to a
stand as shown in the figure.
Stationary wave patterns are produced when the vibrator vibrates at 12 Hz and 16 Hz. No
pattern is produced at frequencies between these two. The speed of wave along the string is
23. In the following figure, a plane wave travels towards two narrow gaps and circular waves come
out from the gaps. P is 15 cm away from S₁ and 20 cm away from S2, while Q is 14 cm away
from S₁ and 12 cm away from S₂.
If the wavelength of the wave is 2 cm, what kind of interference will occur at P and Q?
Constructive
Destructive
Constructive
Destructive
Constructive
Constructive
Destructive
Destructive
24. In a ripple tank experiment, plane waves travel towards a barrier and reflected waves are
formed. Which of the following is/are incorrect?
(1) The amplitude of the reflected waves is larger than that of the incident waves.
(2) The frequency of the waves remains unchanged after reflection.
(3) The speed of the reflected wave is higher than that of the incident waves.
(1) and (2) only
(1) and (3) only