Download Physics_1996_Paper_II_+_ANS

PAPER II:
If necessary, tack g =10 ms-2.
All the cells are assumed to have negligible internal resistance.
1.Which of the following expressions does not represent energy?
A.Force×displacement
B.1/2×mass×(speed)2
C.(Current)2×resistance
D.Current×potential difference×time
E.Mass×specific latent heat of fusion
2.A man walks 40 m towards the west. He then walks 40 m towards the south and lastly
walks 70 m towards the east. find the magnitude of the resultant displacement
of the man.
A. 30m
B. 40m
C. 50m
D. 70m
E. 150m
3.Which of the following statements about mass and weight is incorrect?
A.Mass is measured in kilograms and weight in newtons.
B.Mass is a scalar while weight is a vector.
C.Mass is a measure of the inertia of an object and weight is a measure of the gravitational
pull on it .
D.The weight of an object at a particular place is proportional to its mass.
E.Both the mass and weight of an object vary slightly at different places on the earth.
4.An object moves with unform acceleration along a straight line.Which of the following
graphs correctly describe(s) the motion of the object?
A.(1)only
B.(2)only
C.(1)and(3)only
D.(2)and(3)only
E.(1),(2)and(3)
5.Which of the following statements concerning the motion of an object is/are correct?
(1)A constant unbalanced force is needed to keep an object moving with uniform velocity.
(2)An increasing unbalanced force is needed to keep an object moving with uniform
acceleration.
(3)An object may remain at rest if there is no unbalanced force acting on it .
A.(2)only
B.(3)only
C.(1)and(2)only
D.(1)and(3)only
E.(1),(2)and(3)
6.
A coin and a feather are released from rest in vacuum as shown above. Which of the
following is/are correct deductions from this experiment?
(1)The masses of the coin and the feather are identical in vacuum.
(2)The coin and the feather fall with the same acceleration in vacuum.
(3)The forces acting on the coin and the feather in vacuum are identical.
A.(1)only
B.(2)only
C.(1)and(3)only
D.(2)and(3)only
E.(1),(2)and(3)
7.A motor car of mass 2500 kg accelerates from rest to a speed of 20 ms-1 in 5s on a level
road .Find the average power of the car.
A.10KW
B.50KW
C.100KW
D.200KW
E.250KW
8.
A block remains at rest on an inclined plane as shown above.Which of the following
statements is/are true?
(1)The frictional force acting by the plane on the block is zero.
(2)The normal reaction acting by the plane on the block is zero.
(3)The resultant force acting on the block is zero .
A.(2)only
B.(3)only
C.(1)and(2)only
D.(1)and(3)only
E.(1),(2)and(3)
9.
A uniform plank AB of weight 200N rests on two trestles as shown above. A boy stands at
the end B of the plank. What can the maximum weight of the boy be without tilting the
plank?(Assume the weight of the plank acts through its center.)
A.75N
B.100N
C.200N
D.300N
E.600N
10.
The above diagram shows a man lifting a ball vertically upwards with uniform
acceleration.
Let F1 be the force acting on the ball by the man,
F2 be the force acting on the man by the ball.
F3 be the gravitational force acting on the ball.
Which of the following correctly describes the relation between the magnitudes of the
forces?
A.F1=F2>F3
B.F1=F3>F2
C.F1>F2=F3
D.F1>F2>F3
E.F1>(F2+F3)
11.
An object is placed in front of a concave mirror as shown above, where F denotes the focus
of the mirror. Which of the following correctly describes the nature of the image formed?
A. real, inverted and diminished
B. real, inverted and magnified
C. virtual, inverted and magnified
D. virtual, erect and diminished
E. virtual, erect and magnified
12.
If F denotes the focal length of the above convex mirror, which of the following ray
diagrams is correct?
13.Which of the following is not a correct application of the corresponding optical device?
Optical device Application
A.Concave mirror Shaving mirrors
B.Convex mirrors Rear-view driving mirrors
C.Concave lenses Spectacles for correcting long sight
D.Convex lenses Magnifying glasses
E.Triangular glass prisms Periscopes
14.A ray of red light travels in air and strikes a triangular glass prism at an angle of
incidence 45°. The critical angle of red light for the glass is 42°. Which of the following
diagrams best shows the path of the ray ?
15.
When an object O is placed in front of a convex lens and a plane mirror as shown above,
an image I is formed at the same position as the object. Which of the following
Statements is/are correct?
(1)The image I is real.
(2)The focal length of the lens is 10cm.
(3)If the distance between the lens and the plane mirror is changed to 2 cm, the position of
the image I remains unchanged.
A.(1)only
B.(3)only
C.(1)and(2)only
D.(2)and(3)only
E.(1),(2)and(3)
16.The temperatures of two gases are 0℃ and 100℃ respectively .Eepress the temperature
difference of the two gases in absolute temperature scale.
A.-173K
B.0K
C.100K
D.273K
E.373K
17.
A ray of light traveling in air enters a semi-circular glass block as shown above.
Different values of the angle of incidence θ and the corresponding values of the
angle of refraction Φ are measured. Which of the following expressions
represents the
Repractive index of the glass?
A.the slope of the graph of sinθ against sinΦ
B.the slope of the graph of sinΦ against sinθ
C.the slope of the graph of θ against Φ
D.the slope of the graph of Φ against θ
E.the value of sinΦ when θ=90°
18.Which of the following phenomena concerning water can be explained by its high
specific heat capacity?
(1)Water is used as a coolant in car engines.
(2)Inland areas generally have hotter summers and colder winters than coastal areas of
similar latitude and altitude.
(3)The body temperature of human beings changes slowly even when the surrounding
temperature changes sharply.
A.(2)only
B.(3)only
C.(1)and(2)only
D.(1)and(3)only
E.(1),(2)and(3)
(For Questions 19 and 20.)The following apparatus is used to find the specific latent heat
of vaporization of a liquid.
19.When the liquid boils, the reading of the balance is taken. After 200s, the reading of the
balance decreases by 0.02 kg. The power output of the heater is 150W. If 20﹪of the
energy supplied is lost to the surroundings,find the specific latent heat of vaporization of
the liquid.
A.120Jkg-1
B.480Jkg-1
C.3.0×105Jkg-1
D.1.2×106Jkg-1
E.1.5×106Jkg-1
20.Which of the following can improve the accuracy of the experiment?
(1)covering the beaker with a lid
(2)completely immersing the heating coil in liquid
(3)stirring the liquid throughout the experiment
A.(1)only
B.(2)only
C.(1)and(3)only
D.(2)and(3)only
E.(1),(2)and(3)
21.
Two solid substances X and Y of equal mass are separately heated by two identical heaters.
The above graph shows the variation of the temperatures of the substances with
time .Which of the following statements is/are correct?
(1)The melting point of X is higher than that of Y.
(2)The specific heat capacity of X is smaller than that of Y.
(3)The specific latent heat of fusion of X is smaller than that of Y
A.(1)only
B.(3)only
C.(1)and(2)only
D.(2)and(3)only
E.(1),(2)and(3)
22.The volume of a fixed mass of gas is V. If the pressure of the gas is doubled and its
absolute temperature is reduced to half of the initial value, the volume of the gas becomes
A. 1/4V
B. 1/2V
C. V
D. 2V
E. 4V
23.Which of the following descriptions concerning the gas molecules is correct when a
fixed mass of gas is compressed and also heated at the same time?
Average spacing between….. Average speed of
The gas molecules …………..the gas molecules
A. remains unchanged………. increase
B. remains unchanged ……..remains unchanged
C. decreases ………………..decreases
D. decreases …………….remains unchanged
E. decreases ………………increases
24.
A vibrator generates a traveling wave on a string .Figure (a) shows the shape of the string
at a certain instant. Figure (b) shows the variation of the displacement of a certain particle
on the string with time .Which of the following expressions represents the speed of the
traveling wave?
A. x
B. y
C. x/y
D. y/x
E. xy
25.
A vibrator generates continuous plane waves in a ripple tank (see Figure (a).
Figure (b) shows the wave pattern observed.
Now the ripple tank is tilted as shown in Figuren (c) .Which of the following diagrams best
shows the pattern observed?
26.
X-rays
P
Visible light
Q
Microwaves
Part of the electromagnetic spectrum is shown above. Which of the following statements
is/are correct?
(1)P is ultra-violet and Q is infra-red.
(2)The wavelength of P is shorter than that of Q.
(3)The speed of P in vacuum is higher than that of Q.
A.(1)only
B.(3)only
C.(1)and(2)only
D.(2)and(3)only
E.(1),(2)and(3)
27.
In the above circuit, the reading of ammeter A2 is 0.3A. Find the reading of ammeter A1.
A.0.75A
B.0.6A
C.0.5A
D.0.45A
E.It cannot be determined since the e.m.f. of the battery is not given.
28.Which of the following is not an application of the corresponding electromagnetic
wave?
Electromagnetic wave
Application
A.Ultra-violet
Camera autofocusing
B.Infra-red
Detecting survivors buried in landslides
C.Microwaves
Satellite communication
D.X-rays
Detecting weapons hidden in suitcases
E.Radio waves
TV broadcasting
29.
A small conducting sphere is suspended by an insulated thread. When a positively charged
rod is brought near the sphere, the sphere is attacted as shown above. Which of the
following is/are reasonable deduction(s)?
(1)The sphere may carry a positive charge.
(2)The sphere may carry a negative charge.
(3)The sphere may be neutral.
A.(1)only
B.(2)only
C.(1)and(3)only
D.(2)and(3)only
E.(1),(2)and(3)
30.It is known that the resistance of a resistor R is about 5KΩ. Which of the
following circuits is most suitable for measuring the resistance of R?
The ammeter and voltmeter used are common moving coil meters.
31.Which of the following devices is not an application of electromagnetic induction?
A. a transformer
B. a bicycle dynamo
C. a magnetic tape playback head
D. a moving coil microphone
E. a moving coil loudspeaker
32.
In Figure (a), the ammeter reading and the total power dissipated in the two identical
resistors are I and P respectively. The resistors are rearranged as shown in Figure (b). Find
the ammeter reading and the total power dissipated in the two resistors.
Ammeter reading …..Total power dissipated
A. 2I………………………. 2P
B. 2I ……………………….4p
C. 4I ………………………2P
D. 4I ………………………4P
E. 4I………………………. 8P
33.A milliammeter of resistance 10Ω has a full scale deflection of 10mA. Which of the
following methods can convert the milliammeter to measure voltages up to 5V?
A.connecting a 0.02Ω resistor in series with the milliammeter.
B.Connecting a 490Ω resistor in series with the milliammeter.
C.Connecting a 0.02Ω resistor in parallel with the milliammeter.
D.Connecting a 50Ω resistor in parallel with the milliammeter.
E.Connecting a 490Ω resistor in parallel with the milliammeter.
34.
The switch S and the fuse of an iron are incorrectly fitted in the neutral wire as shown
above. Which of the following statements is correct?
A.The iron will not operate even when S is on .
B.The iron will still operate even when S is off .
C.The iron will still operate ,but if there is a high current the fuse will not blow.
D.The iron will still operate, but if the live wire accidently touches the body of the iron the
current cannot be conducted to the earth.
E.The iron will still operate ,but the heating element will remain at a high potential even
when S is off.
35.
Two long insulated wires carrying equal currents are placed perpendicular to each other on
a table as shown above. The points P, Q, R and S are all of equal distances from the
wires .At which point(s) is the resulting magnetic field pointing out of the paper?
A.P only
B.Q only
C.S only
D.P and Q only
E.R and S only
36.
The primary coil of a transformer has 3600 turns and is connected to a 200 V a.c.supply.
The secondary coil has 180 turns, Which can be tapped at different points as shown
above .A ‘40W,10V’ light bulb is connected to the transformer so that it works at its
rated value. Which of the following statements is/are correct?
(1)The bulb should be connected to points P and Q.
(2)The current through the bulb is 4A.
(3)If the efficiency of the transformer is 80﹪, the current in the primary coil is 0.25A.
A.(1)only
B.(2)only
C.(1)and(3)only
D.(2)and(3)only
E.(1),(2)and(3)
37.
In the above nuclear reactions ,what do X, Y and Z represent?
X …………………Y………………. ….Z
A. an α particle …..a proton ………a β particle
B. an α particle ….a neutron ………a β particle
C. an α particle…. a neutron ………γ rays
D.a β particle ……a neutron……….γ rays
E.a β particle a proton a neutron
38.
In the above circuit, the sounding of the buzzer depends on (a) whether switch S is open or
closed; (b) whether the temperature of the thermistor X is higher or lower than a preset
temperature T0.
Which of the following statements is/are correct?
(1)The buzzer sounds when S is closed and the temperature of X is lower than T0.
(2)The value of T0 can be varied by changing the resistance of Y.
(3)The loudness of the buzzer can be increased by reducing the resistance of Y
A.(1)only
B.(2)only
C.(1)and(3)only
D.(2)and(3)only
E.(1),(2)and(3)
39.Which of the following can be deflected by both an electric field and a magnetic field?
(1)α particles
(2)β particles
(3)γ rays
A.(1)only
B.(3)only
C.(1)and(2)only
D.(2)and(3)only
E.(1),(2)and(3)
40.
An a.c.supply and a CRO are connected to a black box as shown in Figure (a).Figure(b)
shows the trace shown on the CRO. Which of the following is/are possible arrangement(s)
inside the black box?
A.(1)only
B.(2)only
C.(1)and(3)only
D.(2)and(3)only
E.(1),(2)and(3)
41. The activity of a radioactive isotope falls to 1/16 of its initial value in one hour. Find
the half-life of the isotope.
A. 3.75minutes
B. 7.5minutes
C. 10minutes
D. 15minutes
E. 20minutes
1st statement…… 2nd statement
nd
A. True …………….True ….2 statement is a correct
………………………………explanation of the 1st
statement
B. True …………….True…. 2nd statement is not a
correct
………………………………explanation of the 1st
statement
C. True …………….False
D. False…………… True
E. False …………….False
1st statement …………………………………2nd statement
42.Raising a heavy load with a screw-jack ……A smaller effort can
be used to raise
has a higher efficiency than raising it …………a heavy load when
a screwjack is used.
without a screwjack.
43.The internal energy of a body always ……..The temperature of a body always
increases when the body is heated…………….. Increases when the body is heated.
44.At a point of constructive interference …….At a point of constructive interference
of two waves,a crest is always formed. ……….Of two waves, the amplitude of
………………………………………………..vibration increases.
45.The efficiency of a transformer is …………..The energy lost due to induced
increased if its iron core is laminated…………...Currents (eddy currents) in the iron
…………………………………………………core of a transformer is reduced if
………………………………………………….the core is laminated.
CE Physics (English) 1996 Paper 2 答案
1C
11E
21D
31E
41D
2C
12E
22A
32D
42D
3E
13C
23E
33B
43C
4D
14E
24C
34E
44D
5B
15E
25B
35B
45A
6B
16C
26C
36D
7C
17A
27A
37B
8B
18E
28A
38B
9D
19D
29D
39C
10A
20B
30A
40A