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CCC HOH FUK TONG COLLEGE
2004-05 Second Term Examination
Physics Paper II
Date :
Class :
2005-06-28
Time : 10:45-11:45 (1hr)
S.4
Name :
Max. Marks :
Class No.（
45
）
Multiple-choice questions
1
If the mercury in a liquid-in-glass thermometer is replaced by alcohol, which of
the following statements is/are correct?
(1)
(2)
(3)
A
B
C
D
The thermometer can measure a higher temperature.
The thermometer becomes less sensitive to temperature change.
The thermometer will be safer to use.
(2) only.
(3) only.
(1) and (2) only.
(2) and (3) only.
2
0.2 kg of water at 70 C is mixed with 1 kg of water at 10 C. Find the final
temperature of the mixture. (Assume there is no energy lost to the surroundings.)
A 20 C
B 30 C
C 40 C
D 50 C
3
Which of the following statements about the conduction of heat is wrong?
A
Metals are generally better conductors than woods.
B
Lighter objects are generally better conductors than heavier objects.
C
Air is a poor conductor.
D
Convection is generally less important than conduction in transferring heat
in solids.
4
Which of the following processes involve(s) convection?
(1) Formation of land and sea breezes.
(2) Transfer of solar energy from the Sun to the Earth.
(3) Heating a kettle of water on a stove.
A
(1) only.
B
(3) only.
C
(1) and (2) only.
D
(1) and (3) only.
D
2
5
Which state of matter is the poorest conductor of heat?
A Solid
B Liquid
C Gas
D No difference
6
Convection causes
A sea-land breezes.
B tsunamis（海嘯）.
C
E
a drop of ink to spread out in still water.
lava（熔岩）to flow downhill.
7
The diagram below shows the apparatus used for finding the specific latent heat of
vaporization of a liquid.
The heater has a power output of 100 W. The balance reading decreases by 10 g
after the liquid boils for 200 s. If the heat lost to the surroundings is ignored, what
is the specific latent heat of vaporization of the liquid?
A
B
C
D
4  103 J kg–1
2  106 J kg–1
4  106 J kg–1
6  106 J kg–1
8
Two solid substances P and Q of equal mass are heated by two identical heaters
until they boil. The temperatures of each substance at different times are recorded,
as shown in the graph below.
3
Which of the following statements is INCORRECT?
A
B
C
D
The melting point of P is lower than that of Q.
The specific heat capacity of solid P is larger than that of solid Q.
The specific latent heat of fusion of P is smaller than that of Q.
The boiling point of P is higher than that of Q.
9
What is the most suitable unit of time for describing the time taken for a ball to
fall from the roof of a 30-m tall building to the ground?
A
second
B
minute
C
hour
D
day
10
In a 1-km run, a student starts from S and ends at T as shown in the following
figure. What is the magnitude of his displacement?
A
119 m
B
C
D
200 m
400 m
600 m
11
Which of the following motions can be recorded by a motion sensor?
(1) Motion along a straight line.
(2) Motion along a curved path.
(3) Motion along a zigzag path
A
(1) only.
B
(1) and (2) only.
C
(1) and (3) only.
D
(1), (2) and (3).
12
A can of soft-drink is dropped from the second floor of a building. If each floor is
3.5 m high, what is the displacement of the can after 2 s?
A
4.47 m
B
7m
C
20 m
D
40 m
B
4
13
A car is slowing down uniformly along a straight road. It slows down to 20 m s-1
after travelling a distance of 100 m, and runs 80 m further before it comes to a
stop. What is its speed at first?
stop
20 m s-1
100 m
80 m
A 30 m s-1
B 40 m s-1
C 50 m s-1
D 60 m s-1
14
A 3-kg box is pushed by a horizontal force of 21 N. The box moves horizontally
with an acceleration of 4 m s–2.
4 m s2
21 N
3 kg
What is the frictional force acting on the box?
A
6N
B
C
D
8N
9N
12 N
15
A ball is pushed up an inclined plane by a force of 10 N to a height of 5 m from
the ground.
10 N
5m
1 kg
30
Which of the following statements is/are correct?
(1) Work done by the force is 50 J.
(2) The potential energy gained by the ball is 50 J.
(3) If the force makes an angle with the surface of the inclined plane, the work
done by the force would be greater.
A
(2) only.
B
(1) and (2) only.
C
D
(1) and (3) only.
(1), (2) and (3).
5
16
(Refer to the last question.) A ball-bearing is released at E of a smooth rail.
Which of the following graphs is/are correct?
(1)
(2)
kinetic energy
potential energy
(3)
total energy
A
B
C
D
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
17
In the following figure, ball A of mass 2m and ball B of mass 3m fall from the
height of h and 3h respectively.
B
3h
A
h
What is the ratio of the maximum velocity of A to that of B?
A 1:3
B 2:3
C 1: 3
D 2: 3
C
6
18
In the figure below, ball A of mass 1 kg moves at 0.2 m s1 and ball B of mass 2
kg moves at 0.3 m s1. If A moves at 0.2 m s1 in the direction opposite to its
initial velocity after collision, what is the impulse on A?
0.2 m s1
A
A
B
C
0.2 kg m s1
0.4 kg m s1
0.5 kg m s1
D
0.6 kg m s1
0.3 m s1
0.2 m s1
B
0.1 m s1
A
B
19
A 7-g bullet is fired towards a wooden block by a 3-kg gun. The bullet embeds in
the block after travelling 15 cm inside the block. On average, the block applies a
resisting force of 280 N on the bullet.
What is the velocity of the bullet before it hits the block?
A
B
C
D
100 m s1
110 m s1
120 m s1
130 m s1
20
Balls A and B are thrown vertically upwards and downwards respectively.
B
thrown downwards
A
thrown upwards
If their initial speeds are the same, which of the following statements is/are
correct when they meet?
(1) Their displacements should be the same.
(2) Their speeds should be the same.
(3) Their accelerations should be the same.
A
(1) only.
B
(3) only.
C
(1) and (3) only.
D
(1) and (3) only.
B
7
21
Which of the following description about speed, velocity and acceleration is
INCORRECT?
A
Velocity and acceleration are vectors.
B
An object can have zero acceleration but non-zero speed.
C
If an object has non-zero acceleration, its velocity must not be zero at all
times.
D
If an object has zero acceleration, its average speed is equal to the
instantaneous speed.
22
Which of the following quantities is/are scalar?
(1) Temperature
(2)
(3)
A
B
C
D
Potential energy
Volume
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
23
John walked on a circular track of radius 100 m. What was his displacement if he
walked a complete cycle?
A 0m
B
100 m
C
D
100  m
200  m
24
If the weight of a boy is 750 N on the Earth, what is his weight on Jupiter?
(Given: g on Jupiter = 26 m s2)
A
750 N
B
1950 N
C
2880 N
D
7500 N
25
Mary of weight W stands inside a lift. The life is moving upwards at a constant
acceleration. Let the normal force exerted on Mary by the floor be R, which of the
following statements is/are correct?
(1) R is greater than W in magnitude.
(2) R and W are in opposite directions.
(3) R and W form an action-and-reaction pair according to Newton's third law.
A
(1) only
B
(2) only
C
(1) and (2) only
D
(2) and (3) only
C
8
26
Gill uses the following portable gas stove to prepare hot pot. If the stove can
output energy of 1920 kcal in 1 hour, how much time does he need to wait for if
5150 kJ is required to boil water?
(Given: 1 calorie (cal) = 4.1868 J)
A
0.320 hour
B
0.641 hour
C
2.68 hours
D
11.2 hours
27
When two objects of different temperatures are put in contact, which of the
following statements is/are correct?
(1)
(2)
After sufficiently long time, their final temperatures will be the same.
The temperature rise of one object is equal to the temperature drop of
another object.
(3)
The specific heat capacity c of the whole body is equal to
A
B
C
D
and c2 are the specific heat capacities of the two objects.
(1) only.
(1) and (2) only.
(1) and (3) only.
(2) and (3) only.
c1  c2
, where c1
2
28
Which of the following actions CANNOT increase the rate of heat loss by
radiation of a hot object?
A
B
C
D
Increase its temperature.
Increase its surface area.
Paint its surface silvery.
Paint its surface dull black.
29
041203
The following picture is made of a series of successive photographs of a ball
falling from a height.
9
If the camera takes images at a rate of 75 times per second, what is the time
interval between the first and the fourth image?
A 0.02 s
B 0.03 s
C 0.04 s
D 0.05 s
30
In the following figure, Tommy stands at a cliff and throws a stone vertically
upwards at 15 m s1. The stone rises to the highest point and then falls into the
sea.
If Tommy is 50 m above the sea, what is the time interval for the stone moving in
air? Take g = 10 m s2.
A 4s
B 4.5 s
C 5s
D 5.7 s
31
Tom gives a sudden push to his toy car of mass 50 g. The car runs on the rough
floor at an initial velocity of 2 m s–1 and stops after travelling for a distance of 4
m. Find the average frictional force acting on the car.
A
0.01 N
B
0.025 N
C
0.05 N
D
0.1 N
10
32
Which of the following graphs show(s) that a constant resultant force is acting on
the object?
(1)
(2)
s
t
(3)
v
t
a
t
A
B
C
D
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
33
A car of mass 1500 kg travels with constant velocity 40 km h1. If the friction and
air resistance are negligible, what is the work done by the engine to accelerate the
car to 60 km h1?
A
95 kJ
B
103 kJ
C
108 kJ
D
116 kJ
34
A 7-kg metal-ball is fired from a 1500-kg cannon. If the metal-ball moves at
100 m s 1 at an angle 20 with the horizontal, what is the horizontal recoil speed
of the cannon?
A
B
C
D
D
0.13 m s1
0.21 m s1
0.355 m s1
0.439 m s1
11
35
Which of the following MUST be a property of a virtual image?
A
It is laterally inverted.
B
It is of the same size as the object.
C
It cannot be picked up on a screen.
D
It is as far behind the mirror as the object is in front.
36
As shown in the figure below, a letter 'P' is placed in front of a plane mirror.
Which of the following correctly shows the image of the letter 'P' formed by the
plane mirror?
A
B
C
D
37
Which of the following is NOT an application of the total internal reflection of
light?
A
Optical fibre
B
Reflecting telescope
C
Pentaprism in a single-lens reflex camera
D
Prisms in a periscope
38
In the following diagram, the magnification of the real image is 1.5. What is the
focal length of the convex lens?
A
B
4 cm
6 cm
C
D
8 cm
10 cm
12
39
A light ray is incident on a glass window at an angle of 30 to the normal. At what
angle (to the normal) does it go out from the other side?
(Given: refractive index of glass = 1.5)
A
B
C
D
19.5
30
48.6
60
B40
Which of the following statements about the image formed by a concave lens
is/are correct?
(1) It is between the lens and object.
(2)
(3)
A
B
C
D
It is always diminished.
It will be formed at infinity if the object is located at the focus of the lens.
(2) only
(1) and (2) only
(1) and (3) only
(2) and (3) only
41
If F and F' are the foci of a convex lens, which of the following ray diagrams
is/are INCORRECT?
(1)
(2)
(3)
A
(1) only
B
C
D
(2) only
(1) and (3) only
(2) and (3) only
42
A light ray passes from air into water (refractive index 1.33). What is the smaller
angle between the reflected ray and refracted ray?
13
A
B
C
D
97
105
111
117
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 option A, B,
C or D, according to the following table.
1st statement
2nd statement
A
True
True
B
True
True
C
True
False
D
False
True
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
43
2nd statement
Particles of different solids have
Particles have larger kinetic energy if
the same average kinetic energy if they vibrate more vigorously.
the solids have the same
temperature.
44
The displacement of a freely
The acceleration of a freely falling
falling object increases with time. object increases with time.
45
We cannot see virtual images
The image formed on the retina in our
directly.
eyes is always real.
--End of Paper--