Download Physics_1997_Paper_II_+_ANS

PAPER II:
1. Which of the following expressions a physical quantity which is different from the
other?
A.Work/Time
B. (Voltage)2/Resistance
C. Force ×velocity
D. (current)2 ×resistance
E. Mass ×specific latent heat of fusion
2.
A student walks along a curve ABC, which is made up of two semi-circular part AB and
BC of radius 3 m and 4 m respectively. He talks 2 s to walk from A to B and 5 s to walk
from B to C. Find the magnitude of the average velocity of the student from A to C.
A.1.0m/s
B. 2.0 m/s
C. 2.3 m/s
D.3.1m/s
E. 3.6 m/s
3.
A block is placed on a smooth inclined plane. A force
P
parallel to the inclined
plane is applied to the block so that the block moves up the plane. Which of the following
diagrams correctly shows all the forces acting on the block?
4.Which of the following physical quantities is not a vector?
A. acceleration
B. Momentum
C. Velocity
D. Weight
E. Work
5. A particle of mass m is thrown vertically upwards with initial
speed v. When the
particle returns to its starting point , what are the changes in momentum and kinetic energy
of the particle?
Change in
momentum Change in kinetic energy
A.
0
0
B.
0
m v2
C.
mv
m v2 /2
D.
2mv
0
E.
2mv
m v2
6. A particle is released from rest and falls vertically vertically under gravity. If the
distance travelled
by the particle in the 1st second is
x and that travelled in the 2nd
second is y, find the ratio x:y.
A.1:1
B.1:2
C.1:3
D.1:4
E.1:5
7.
A pendulum bob is suspended by a light inextensible string. The bob is
Released from rest at a point A as shown above.When the bob reaches the
Lowest point B, the string hits a fixed pin. Which of the following statements is/are
correct?
(1)The bob has maximum kinetic energy at B.
(2)The highest level that the bob can reach is the level of the pin.
(3)The work done by the tension of the string is zero throughout the motion.
A.(2)only
B.(3)only
C.(1)and(2)only
D.(1)and(3)only
E.(1),(2)and(3)
8.A machine lifts up a load of 1200 N to a height of 1.5 m in 2 s. Find the average output
power of the machine.
A. 400W
B. 900W
C. 1800W
D. 3600W
E. 9000W
9.Which of the following pairs of forces is/are action and reaction pair(s)
according to Newton’s third law of motion?
(1) The weight of a man AND The force acting on the man
standing on a chair. By the chair.
(2)The gravitational force AND The gravitational force acting on the
acting on the earth by moon moon by the earth.
(3)The force exerted by a AND The force exerted by the water to
swimmer on the water push the swimmer forward.
To push the water backward.
A.(1)only
B.(2)only
C.(1)and(3)only
D.(2)and(3)only
E.(1),(2)and(3)
10.
A light plank of length 2 m rests on two trestles S1 and S2 as shown above. A boy of weight
500N stands at the mid-point of the plank.Find the forces
Acting on the two trestles by the plank.
Force acting on S1
Force acting on S2
A. 500/3N
1000/3N
B. 200N
300N
C. 250N
250N
D. 300N
E. 1000/3N
200N
500/3N
11.Which of the following correctly describes the nature of the image of an object formed
by a convex mirror?
A. virtual, diminished and formed between the mirror and the principal focus
B. vitual, diminished and formed between the object and the mirror
C. virtual, magnified and formed between the principal focus and the center of
curvature
D. real, diminished and formed between the mirror and the principal focus
E. real, magnified and formed between the principal focus and the center of curvature
12.
In the above diagram, A’B” is the image of an object AB formed by an optical device
PQ. What is PQ?
A.a concave mirror
B.a convex mirror
C.a plane mirror
D.a concave lens
E.a convex lens
13.
In the above diagram,the image I of an object O is produced by a concave mirror. Where
should the positions of the mirror and its principal focus be ?
Position of mirror……posiyion of principal focus
A. P …………………………..Q
B. P …………………………...R
C. Q…………………………...R
D. R…………………………...S
E. R …………………………..Q
14.Which of the following is/are correct application(s) of concave mirrors?
(1)Shaving mirrors
(2)Rear-view driving mirrors
(3)Reflectors for car headlights
A.(2)only
B.(3)only
C.(1)and(2)only
D.(1)and(3)only
E.(1),(2)and(3)
15.Which of the following phenomena involve(s) total internal reflection
of light?
(1)The sparkling of a diamond.
(2)The formation of a mirage.
(3)A ruler appearing bent when dipped in water.
A.(2)only
B.(3)only
C.(1)and(2only
D.(1)and(3)only
E.(1),(2)and(3)
16.Which of the following statements concerning a long-sighted eye is/are correct?
(1) It can be corrected by a convex lens.
(2) The distance between the eye and its near point is longer than that of a normal
eye.
(3) The image of an object placed close to the eye is formed in front of the retina.
A.(1)only
B.(3)only
C.(1)and(2)only
D.(2)and(3)only
E.(1),(2)and(3)
17.A fixed mass of gas at 120℃ is heated at constant volume so that its pressure is
tripled. Find the new temperature of the gas.
A. 40℃
B. 360℃
C. 633℃
D. 906℃
E. 1179℃
18.Which of the following graphs correctly shows the relation between the pressure P
and volume V of a fixed mass of gas at constant temperature?
19.
The above apparatus is used to find the specific heat capacity of a liquid. Which of the
following can improve the accuracy of the experiment?
(1)Taking the final temperature of the liquid immediately after switching off the power
supply
(2)Covering the cup with a lid
(3)Stirring the liquid throughout the experiment
A.(1)only
B.(3)only
C.(1)and(2)only
D.(2)and(3)only
E.(1),(2)and(3)
20.An immersion heater of power 100 W is used to heat 0.3kg of a liquid with specific
heat capacity 2000 J kg-1K-1.If the initial temperature of the liquid is 23℃, find its
temperature after 2 minutes. Assume all the energy given out by the heater is absorbed by
the liquid.
A.(0.3*2000*23)℃
B.(0.3*2000*23*2/100)℃
C.(100*120*0.3/2000+23)℃
D.(100*120/0.3*2000+23)℃
E.(0.3*2000/100*120+23)℃
21.
The above diagram shows a mechanical model of a gas. The weight of the disc and the
power of the motor can give a measure of two different properties of the gas .
What are these two properties?
Weight of the disc
A. Pressure
power of the motor
Volume
B. Pressure
Temperature
C. Volume
Pressure
D. Volume
Temperature
E. Temperature
Pressure
22.Which of the following statements concerning microwaves and ultrasonic
waves is/are correct?
(1)Microwaves are electromagnetic waves while ultrasonic waves are not.
(2)Microwaves and ultrasonic waves travel with the same speed in air.
(3)Microwaves can be diffracted while ultrasonic waves cannot.
A.(1)only
B.(3)only
C.(1)and(2)only
D.(2)and(3)only
E.(1),(2)and(3)
(For Question 23 and 24.) A vibrator generates a stationary wave on a string.The diagram
below shows the string at a certain instant.
23.Which of the following statements is incorrect?
A. The distance between X and Y is equal to half the wavelength of the stationary
wave.
B. The particles at X and Y always remain at rest.
C. All particles between X and Y on the string vibrate in the same direction.
D. All particles between X and Y on the string vibrate with the same frequency.
E. All particles between X and Y on the string vibrate with the same amplitude.
24.The vibrating string also sets the neighbouring air into vibration. Which of the
following statements about the waves on the string and those in air must be correct?
A. They are both transverse.
B. They are both stationary.
C. They have the same speed.
D. They have the same wavelength.
E. They have the same frequency.
25.
A vibrator generates continuous plane waves in a ripple tank. The waves undergo
diffraction when they pass through a slit .Which of the folloeing can increase the degree of
diffraction of the waves?
(1)Increasing the width of the slit
(2)Placing the vibrator close to the slit
(3)Increasing the wavelength of the water waves
A.(1)only
B.(3)only
C.(1)and(2)only
D.(2)and(3)only
E.(1),(2)and(3)
26.Which of the following is an application of ultra-violet radiation?
A. Camera autofocusing
B. Detecting cracks in railway tracks
C. Detecting survivors buried in landslides
D. Measurement of the depth of the sea-bed
E. Sterilization of drinking water
27.The following are the steps to charge an isolated metal sphere by induction,but they are
in the wrong order.
(1)Removing the finger away from the metal sphere.
(2)Touching the metal sphere with a finger.
(3)Bringing a positively charged rod near the metal sphere.
(4)Removing the positively charged rod away from the metal sphere.
Which of the following shows the correct order?
A.(2),(1),(3),(4)
B.(2),(3),(4),(1)
C.(3),(2),(1),(4)
D.(3),(2),(4),(1)
E.(3),(4),(2),(1)
28.The kilowatt-hour is a unit of
A.
B.
C.
D.
E.
charge.
Current.
Energy.
Potential difference.
Power.
29.(1)
All the resistors in the above networks are identical. Arrange the
networks in ascending order of equivalent resistances:
A.(1),(2),(3)
B.(1),(3),(2)
C.(2),(1),(3)
D.(3),(1),(2)
E.(3),(2),(1)
30.Which of the following statements about the earth wire in an electric
iron is/are correct?
(1)The earth wire should be connected to the metal body of the iron.
(2)If the iron is working properly ,no current passes through the earth
wire.
(3)In case the neutral wire is broken, the earth wire provides a spare
wire for the return path to the mains socket.
A.(1)only
B.(3)only
C.(1)and(2)only
D.(2)and(3)only
E.(1),(2)and(3)
31.
In the above circuit, X and Y are identical heaters .The ammeter has negligible resistance
while the voltmeter has very high resistance. When switch S is closed,
The ammeter records a reading but the voltmeter reading is zero. Which of the following
provides a provides a possible explanation?
A. The heater X burns out.
B. The heater Y burns out
C. The heater X is short-circuited.
D. The heater Y is short-circuited.
E. The battery is short-circuited.
32.Which of the following devices converts mechanical energy into electrical energy when
it works?
A.a buzzer
B.a dynamo
C.a motor
D.a ticker-tape timer
E.a transformer
33.
A galvanometer has a resistance of 1 KΩ and a full scale deflection of 0.1 mA.
The above diagram shows how the galvanometer is converted into a voltmeter with a
full scale deflection of either IV at position P or 5V at position Q. find the resistances of R
and S.
Resistance of R resistance of S
A. 9KΩ 40KΩ
B. 9KΩ 49KΩ
C. 9KΩ 50KΩ
D. 10KΩ 40KΩ
E. 10KΩ 50KΩ
34.
A metal ring is released and falls vertically around a magnet as shown above .Which of the
following diagrams/statement correctly describes the directions of the induced current ,if
any, in the ring at positions X and Y?
E.There are no induced currents in either case.
(For Questions 35 and 36.) In the following circuit, the terminal Q and
the sliding contact R of the variable resistor are connected to the Y-input
of a CRO.
35.Which of the following diagrams correctly shows the trace displayed
on the screen of the CRO?
36.If R is moved towards P, how would the amplitude and period of the trace
displayed on the CRO be affected?
Amplitude of the trace……. Period of the trace
A. increases…………………. remains unchanged
B. increases…………………. increases
C. decreases ………………….remains unchanged
D. decreases ………………….decreases
E. remains unchanged ……….increases
37.
The above diagram shows an electricity generator connected to a load.
Which of the following can increase the e.m.f.produced by the generator?
1. Rotating the coil at a greater speed
2. Reducing the resistance of the load
3. Replacing the coil with one of large area
A.(1)only
B.(2)only
C.(1)and(3)only
D.(2)and(3)only
E.(1),(2)and(3)
38.
The above diagram shows a combination of a NAND gate and an OR gate. Which
of the following sets of the states of inputs P, Q and R would give a low
output at S?(Take 1 for high voltage and 0 for low voltage.)
P
Q
R
A. 0
0
0
B. 0
1
0
C. 0
1
1
D. 1
0
0
E. 1
1
0
39.Which of the following statements about β particles is incorrect?
A. β particles can be stopped by a piece of paper.
B. β particles can be deflected by a magnetic field.
C. βparticles can be blacken photographic films.
D. βparticles can be travel through a vacuum.
E. βparticles consist of fast moving electrons.
40.Which of the following is not an application of radioactivity?
A.
B.
C.
D.
E.
Carbon-14 dating
Examination of foetuses (babies not yet born)
Killing cancer cells in human bodies
Sterilization of food
Thickness gauge
Directions: Each question below (Questions 41-45) 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-E according to the following table:
1st statement 2nd statement
True
True
2nd statement is a correct
st
explanation of the 1 statement
A
True
True
True
False
False
True
False
False
2nd statement is not a correct
explanation of the 1st statement
B
C
D
E
1st statement …………………………………2nd statement
41.Virtual images cannot be ……….The image formed on the photographic
photographed with a camera. ………Film in a camera is always real.
42.A convex lens can be used as a ….The image of an object formed by a
magnifying glass. ……………………Convex lens is always magnified.
43.Light is a wave. ………………………Light can undergo refraction when
it
………………………………………….travels from one medium to another..
44.When a ‘220V,100W’ bulb P …..When a ‘220V,100W’ bulb P and a
and a ‘220V,40W’ bulb Q are ……‘220V,40W’ bulb Q are connected in
connected in series to a 220V ……………series to a 220V supply,the
current
supply,the power disspated in……………. passing through P is large than
that
P is large than that in Q……………………. through Q.
45.(210,83)A and (214,83)B are …………..(210,83)A and (214,83)B have
the same
isotopes of the same element. ………………Number of protons.
CE Physics (English) 1997 Paper 2 第 17 題 答案
1E
11A
21B
31C
41D
2B
12D
22A
32B
42C
3D
13A
23E
33A
43B
4E
14D
24E
34B
44E
5D
15C
25B
35E
45A
6C
16C
26E
36A
7D
17D
27C
37C
8B
18C
28C
38E
9D
19D
29A
39A
10B
20D
30C
40B