OXFORD UNIVERSITY PRESS

NEW SENIOR SECONDARY PHYSICS AT WORK

MOCK EXAMINATION 2013

PHYSICS PAPER 1

Time allowed: 2 hours 30 minutes

This paper must be answered in English

GENERAL INSTRUCTIONS
(1) There are TWO sections, A and B, in this Paper. You are advised to finish Section A in about 60 minutes.

(2) Section A consists of multiple-choice questions in this question paper, while Section B contains
conventional questions printed separately in Question-Answer Book B.

(3) Answers to Section A should be marked on the Multiple-choice Answer Sheet while answers to Section B
should be written in the spaces provided in Question-Answer Book B. The Answer Sheet for Section A
and the Question-Answer Book for Section B will be collected separately at the end of the
examination.

(4) The diagrams in this paper are NOT necessarily drawn to scale.

(5) The last two pages of this question paper contain a list of data, formulae and relationships which you may
find useful.

INSTRUCTIONS FOR SECTION A (MULTIPLE-CHOICE QUESTIONS)

(1) Read carefully the instructions on the Answer Sheet. After the announcement of the start of the
examination, you should first insert the information required in the spaces provided. No extra time will be
given after the ‘Time is up’ announcement.

(2) When told to open this book, you should check that all the questions are there. Look for the words ‘END
OF SECTION A’ after the last question.

(3) All questions carry equal marks.

(4) ANSWER ALL QUESTIONS. You are advised to use an HB pencil to mark all the answers on the
Answer Sheet, so that wrong marks can be completely erased with a rubber. You must mark the answers
clearly; otherwise you will lose marks if the answers cannot be captured.

(5) You should mark only ONE answer for each question. If you mark more than one answer, you will
receive NO MARKS for that question.

(6) No marks will be deducted for wrong answers.

New Senior Secondary Physics at Work

Mock Exam 2013 Paper 1A 1
© Oxford University Press 2012
Section A

There are 36 questions. Questions marked with * involve knowledge of the extension component.

1 Metal blocks P and Q are of the same initial temperature. The ratio of the mass of P to that of Q
is 5 : 1. The ratio of the heat capacity of P to that of Q is 1 : 3. If both blocks absorb the same
amount of energy and are then put into good thermal contact, which of the following statements
about the heat flow between the two blocks is correct? Assume no energy is lost to the
surroundings.
A Heat will flow from P to Q.
B Heat will flow from Q to P.
C Heat will first flow from P to Q, and then Q to P.
D No heat will flow between the two blocks.

2 A gas substance is cooled under room temperature. Its cooling curve is as shown below. The
specific heat capacity of the gas is 2500 J kg−1 C−1. If the rate of energy loss of the substance is
constant throughout the cooling process, what is the specific latent heat of vaporization of the
substance?

temperature / C

80

60

40

20
0 10 20 30 40
time / min

A 75 kJ kg−1
B 100 kJ kg−1

C 150 kJ kg−1
D 250 kJ kg−1

3 Which of the following statements explains why we feel cool when there is a wind?

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© Oxford University Press 2012
 (1) The rate of evaporation of sweat is higher when it is windy.
(2) When wind blows, the warm air around us is replaced with cooler air.
(3) When wind blows, the average kinetic energy of air particles increases.
A (1) only
B (2) only
C (1) and (2) only
D (2) and (3) only

*4 An ideal gas is sealed in a container of fixed volume. The solid line below shows the
distribution of speeds of the molecules of the gas at time T1. The dotted line shows the new
distribution at time T2.

number of molecules

at T2

at T1

speed of
molecules
Which of the following quantities of the gas decrease(s) from T1 to T2?
(1) Temperature
(2) Volume
(3) Pressure
A (1) only
B (2) only
C (1) and (3) only
D (1), (2) and (3)

5 stone acceleration

time of impact
New Senior Secondary Physics at Work
Mock Exam 2013 Paper 1A water surface 3 time
0 Go on to the next page
© Oxford University Press 2012
 Figure (a) Figure (b)

In Figure (a), a stone is released from rest at a certain height above water. After some time, the
stone hits the water surface. For a short duration immediately after the impact, we can assume
the water resistance acting on the stone to be constant. Figure (b) shows the acceleration-time
graph of the stone. Which of the following velocity-time graphs best represents the motion of
the stone?
A velocity B velocity

time time
0 0

C velocity D velocity

time time
0 0

6 A car of mass 1600 kg is travelling on a straight road at 15 m s–1 initially. The driver sees an
obstacle ahead and applies the brake. The car travels a further distance of 20 m before it stops.
Suppose the braking force is a constant. Find the magnitude of the braking force.
A 3800 N
B 4500 N
C 6000 N
D 9000 N

New Senior Secondary Physics at Work 35

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© Oxford University Press 2012
 A boy is flying a kite of mass 0.2 kg attached to a light string. The kite remains stationary and
the string makes an angle of 35 with the horizontal. If the tension of the string is 15 N, what is
the magnitude of the force acting on the kite by the wind?
A 14.0 N
B 16.2 N
C 16.6 N
D 17.5 N

8
train
direction of motion
parcel

A train carrying a 200-kg parcel travels along a straight horizontal railroad with a constant
speed. Which of the following free-body diagrams shows all the forces acting on the parcel?

Note: W = gravitational force acting on the parcel,

R = normal reaction exerted by the train floor on the parcel, and
F = friction acting on the parcel.

A R B R

F
W W

C R D R

F F
W W

9 wooden block
600 m s–1

bullet 500 g

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 A bullet of mass 20 g flies horizontally at 600 m s–1. It hits a 500-g wooden block resting on a
smooth horizontal surface and becomes embedded into the block after impact. Find the change
in kinetic energy of the system (i.e. bullet and block) upon impact.
A –3456 J
B –3462 J
C –3467 J
D –3473 J

10 A passenger lift accelerates upwards uniformly at 0.654 m s–2. When the lift reaches a speed of
1.25 m s–1, the power delivered to the lift by the engine is 29 430 W. How many passengers are
in the lift? Take the mass of the lift to be 1500 kg and assume each passenger has a mass of
75 kg.
A 10
B 11
C 12
D 13

*11

100 m
O

8

A car is moving around a circular path with a banking angle of 8 at a uniform speed v. The
radius of curvature is 100 m. Suppose there is no friction between the car and the road. Find the
value of v.
A 11.7 m s–1
B 20.3 m s–1
C 31.2 m s–1
D 42.1 m s–1

12 The figure below shows a human arm. The forearm and the hand have a total mass of 1.5 kg and
their centre of gravity C is 15 cm from the elbow joint.

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 biceps

F
metal ball
forearm

C C'
elbow joint
4 cm
15 cm
34 cm

Suppose the hand holds a metal ball of mass 5 kg. The centre of gravity C' of the metal ball is
34 cm from the elbow joint. A force F applied by the biceps 4 cm from the elbow joint holds the
forearm at right angles to the arm. Find the magnitude of F.
A 362 N
B 408 N
C 472 N
D 553 N

*13 Q

10 m

S
7m

A monkey of mass 8 kg rests at point P. It grabs a vine and swings to point R where the vine is
vertical. It releases the vine at point R and lands on the ground at point S. Given that point R is
10 m above the ground and the horizontal distance between points R and S is 7 m. Find the
speed of the monkey at point R. Neglect air resistance.
A 2.9 m s–1
B 4.9 m s–1
C 8.3 m s–1
D 14.0 m s–1
14
P

equilibrium
position
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Mock Exam 2013 Paper 1A 7 Go on to the next page
© Oxford University Press 2012 Q
 The above figure shows a wave travelling along a string. At the instant shown, particle P is
moving downwards. Which of the following deductions is/are correct?
(1) The wave is moving to the right.
(2) Half a period later, particle Q will be moving upwards.
(3) The maximum displacements of particles P and Q from the equilibrium position are
different.
A (1) only
B (1) and (2) only
C (2) and (3) only
D (1), (2) and (3)

15 The figure below shows the displacement−time graph of a particle on a transverse wave.

displacement / cm

0 time / s
2 4 6

–5

Which of the following quantities of the wave can be deduced from the graph?
(1) Frequency
(2) Wave speed
(3) Direction of propagation
A (1) only
B (2) only
C (1) and (3) only
D (1), (2) and (3)

16 A train of straight water waves travels from region P to region Q. The following figure shows
the travelling directions of the wave in the two regions.

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 P
Q

Which of the following statements is/are correct?

(1) The water in region P is deeper than in region Q.
(2) When the train of waves travels from region P to region Q, its wavelength increases.
(3) When the train of waves travels from region P to region Q, its frequency increases.
A (1) only
B (3) only
C (1) and (2) only
D (1) and (3) only

17 Two dippers X and Y produce circular water waves in a ripple tank to form an interference
pattern. The antinodal lines are represented by dotted lines as shown. P is a point on an
antinodal line.

X Y
X Y
Which of the following changes will result in destructive interference at P?
(1) Reduce the vibrating frequency of X by half.
(2) Double the amplitude of vibration of X.
(3) Reduce the depth of water in the ripple tank.
A (1) only
B (1) and (2) only
C (2) and (3) only
D (1), (2) and (3)
18 An elastic string is slightly stretched to a length of 1 m. Both ends of the string are fixed. By
giving a disturbance to the string, a stationary wave is produced on it as shown. P and Q are two
particles on the string.

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 Q
P

1m

Which of the following statements is correct?

A The wavelength of the stationary wave is 1 m.
B The speed of the wave along the string is zero.
C The two ends of the string are antinode positions.
D Particles P and Q vibrate in phase.

*19 A beam of monochromatic light is incident normally on a plane transmission grating as shown.
The maximum order of fringes formed is 4. Which of the following is a possible angle θ of the
second order bright fringe?

screen

monochromatic
light
θ
plane
transmission
grating
second order bright fringe

A 13
B 25
C 35
D 45

20 A student directs a ray of light to the centre of a semicircular glass block as shown. Then he
increases the angle of incidence i from 0 to 90 gradually. The refractive index of glass is 1.61.

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 ray box with
a single slit
i
air
×
glass O semicircular
glass block

Which of the following statements is/are correct?

(1) The light has the same frequency in air and in glass.
(2) The speed of light in air is larger than that in glass.
(3) Total internal reflection occurs when i > 38.4.
A (2) only
B (1) and (2) only
C (1) and (3) only
D (1), (2) and (3)

*21 An object is placed at 20 cm from a concave lens of focal length 5 cm. Find the magnification
of the image.
A 0.20
B 0.33
C 4.00
D 6.67

22 Which of the following statements about sound waves is/are correct?

(1) Sound waves require a medium to propagate.

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 (2) When a sound wave travels in air, the vibrations of air particles are perpendicular to the
direction of travel of the sound wave.
(3) The wavelength of a sound wave increases as the wave travels from air to water.
A (2) only
B (1) and (2) only
C (1) and (3) only
D (1), (2) and (3)

23 displacement of particles
in concrete

+
P
︱ distance / cm
15
–
The above figure shows the displacement–distance graph of a sound wave travelling to the right
in a block of concrete at a certain instant. P is a particle on the wave. Which of the following
statements is/are correct? (Take the displacement towards the right as positive.)
(1) P is at a centre of rarefraction at the moment shown.
(2) P is momentarily at rest at the moment shown.
(3) The wavelength of the sound wave becomes larger than 0.1 m when the wave travels
from concrete to air.
A (1) only
B (3) only
C (1) and (2) only
D (2) and (3) only

24 Karen combs her hair. Her comb becomes charged and she puts the comb near small bits of
paper without touching them. Which of the following statements is/are correct?
(1) Karen’s hair is charged.
(2) The bits of paper are charged.
(3) The comb attracts the bits of paper.
A (1) only
B (1) and (3) only
C (2) and (3) only
D (1), (2) and (3)
25 Two oppositely charged parallel metal plates are separated by a small distance d. The electric
field strength between the plates is E. An electron of mass m and charge –e enters the space
between the two plates as shown.
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Mock Exam 2013 Paper 1A
+ + + + 12+ + + + + +
Go on to the next page
© Oxford University Press 2012

e– d
 Which of the following correctly gives the magnitude and direction of the acceleration of the
electron as it travels between the plates?
Magnitude Direction
eE
A same as the electric field
m
eE
B opposite to the electric field
m
eE
C same as the electric field
md
eE
D opposite to the electric field
md

26 Two oppositely charged parallel metal plates are separated by a small distance. The electric
field strength between the two plates is uniform. An electron is projected from the negatively
charged plate to the positively charged plate. Which of the following graphs shows how the
kinetic energy KE of the electron varies with the distance d between the electron and the
negatively charged plate?
A KE B KE

d d
0 0

C KE D KE

d d
0 0
27 M and N are two resistive wires of the same length and thickness. A student passes currents I of
different sizes from 2 A to 10 A through each wire and measures the corresponding voltages V
across the wire. The result is shown in the graph below.

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 V

I/A
0 2 6 8 10

Which of the following statements are correct?

(1) Wire M obeys Ohm’s law from I = 2 A to I = 8 A.
(2) The two wires have the same resistance when I = 6 A.
(3) The resistance of M is greater than that of N from I = 2 A to I = 6 A.
A (1) and (2) only
B (1) and (3) only
C (2) and (3) only
D (1), (2) and (3)

28 100 
X Y

R R

In the network of resistors shown, the resistance across terminals X and Y is 99 . When switch
S is opened, what is the resistance across terminals X and Y?
A Smaller than 49 
B Between 49  and 99 
C Between 99  and 100 
D Larger than 100 

29 An electric toaster is rated at ‘220 V, 1100 W’. Which of the following fuses should be
assembled to the power switch of the toaster?
A 3A
B 5A
C 8A
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 D 13 A

30 Three long parallel current-carrying wires X, Y and Z are aligned as shown. Both X and Z are
2 cm apart from Y. The currents passing through X, Y and Z are 2 A, 1 A and 3 A respectively.

X Y Z

2 cm 2 cm

Which wire experiences the greatest resultant magnetic force per unit length? Which
experiences the smallest?

Greatest Smallest
A Y X
B Y Z
C Z X
D Z Y

*31 Which of the following statements about Hall effect is/are correct?
(1) Hall effect occurs only in current-carrying semiconductors.
(2) From the sign of Hall voltage in a material, we can determine the sign of charge carriers
in the material.
(3) Hall effect can be applied to measure the strength of a steady magnetic field.
A (1) only
B (2) only
C (3) only
D (2) and (3) only

32 Find the directions of the current through the conducting ring when the ring is entering
(Figure (a)) and leaving (Figure (b)) a uniform magnetic field as shown.

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 Figure (a) Figure (b)

Entering the magnetic field Leaving the magnetic field

A clockwise anticlockwise
B clockwise clockwise
C anticlockwise anticlockwise
D anticlockwise clockwise

*33 An alternating current passing through a resistor varies sinusoidally as shown in Figure (a). The
average power dissipated by the resistor is W. If another alternating current with waveform in
Figure (b) is used instead, what will be the average power dissipated by the resistor?

current I / A current I / A

2I0
I0

0 time t / s 0 time t / s
T 2T 0.5T T 1.5T 2T

–2I0 –2I0

Figure (a) Figure (b)

W
A
2
B 1.25 W
C 1.75 W
D 2.5 W

34 number of neutrons
135

134 Rn

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132

131 P
 The diagram above shows the number of neutrons and the atomic number of an isotope of
radon (Rn). The radon nuclide undergoes the following decays and becomes Z.

  
Rn X Y Z

Which of the following nuclides represents Z?

A P
B Q
C R
D S

35 Which of the following equations represents a nuclear fission?

1 H + 1H → 1H + 1H
2 2 3 1
A

1 H + 1H → 2 He + 01n
2 3 4
B

C 239
94 Pu + 01 n → 144
58 Ce + 94
36 Kr + 2 01 n

D 3
2 He + 23 He → 42 He + 211 H

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36 The half-life of a radioactive substance is 6 hours. A G-M counter is used to measure the
acitivity of a sample of the substance. The initial count rate recorded is 1840 counts per second.
After 12 hours, the count rate of the sample becomes 520 counts per second. Estimate the
background radiation.
A 60 counts per second
B 80 counts per second
C 100 counts per second
D 120 counts per second

END OF SECTION A

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Mock Exam 2013 Paper 1A 18
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 List of data, formulae and relationships
Data
molar gas constant R = 8.31 J mol−1 K−1
Avogadro constant NA = 6.02  1023 mol−1
acceleration due to gravity g = 9.81 m s−2 (close to the Earth)
universal gravitational constant G = 6.67  10−11 N m2 kg−2
speed of light in vacuum c = 3.00  108 m s−1
charge of electron e = 1.60  10−19 C
electron rest mass me = 9.11  10−31 kg
permittivity of free space 0 = 8.85  10−12 C2 N−1 m−2
permeability of free space 0 = 4  10−7 H m−1
atomic mass unit u = 1.661  10−27 kg (1 u is equivalent to 931 MeV)
astronomical unit AU = 1.50  1011 m
light year ly = 9.46  1015 m
parsec pc = 3.09  1016 m = 3.26 ly = 206 265 AU
Stefan constant  = 5.67  10−8 W m−2 K−4
Planck constant h = 6.63  10−34 J s

Rectilinear motion Mathematics

For uniformly accelerated motion: Equation of a straight line y = mx + c
Arc length = r
v = u + at
1 Surface area of cylinder = 2rh + 2r2
s = ut + at 2
2 Volume of cylinder = r2h
2
v = u2 + 2as
Surface area of sphere = 4r2
4
Volume of sphere = πr 3
3
For small angles, sin   tan    (in radians)
Astronomy and Space Science Energy and Use of Energy
GMm 
U =− gravitational potential energy E= illuminance
r A
P = AT4 Stefan’s law Q A(TH − TC )
=k rate of energy transfer by conduction
f v λ t d
  Doppler effect
f0 c λ0 k
U= thermal transmittance U-value
d
1
P = Av 3 maximum power by wind turbine
2
Atomic World Medical Physics
1 1.22λ
2
me vmax = hf −  Einstein’s photoelectric equation  Rayleigh criterion (resolving power)
2 d
1  me e 
4
13.6 1
En = − = − 2 eV power = power of a lens
2  2 f
n  8h  0 
2
n
I
energy level equation for hydrogen L = 10 log intensity level (dB)
atom I0
h h Z = c acoustic impedance
= = de Broglie formula
p mv I (Z − Z1 ) 2
= r = 2 intensity reflection coefficient
1.22λ I 0 (Z 2 + Z1 ) 2
 Rayleigh criterion (resolving power)
d I = I0e−x transmitted intensity through a
medium

New Senior Secondary Physics at Work

Mock Exam 2013 Paper 1A 19
© Oxford University Press 2012
 energy transfer during Q1Q 2
A1. E = mcT D1. F= Coulomb’s law
heating and cooling 4 π 0 r 2

energy transfer during Q electric field strength due to a

A2. E = lm D2. E=
change of state 4π 0 r 2 point charge

equation of state for an Q electric potential due to a

A3. pV = nRT D3. V=
ideal gas 4π 0 r point charge

1 V electric field between parallel

A4. pV = Nmc 2 kinetic theory equation D4. E=
3 d plates (numerically)

3RT
A5. EK = molecular kinetic energy D5. I = nAvQ general current flow equation
2N A

l
D6. R= resistance and resistivity
A
v p
B1. F =m = force D7. R = R1 + R2 resistors in series
t t
1 1 1
B2. moment = F  d moment of a force D8. = + resistors in parallel
R R1 R2

gravitational potential
B3. EP = mgh D9. P = IV = I2R power in a circuit
energy
1 force on a moving charge in a
B4. EK = mv 2 kinetic energy D10. F = BQv sin 
2 magnetic field
force on a current-carrying
B5. P = Fv mechanical power D11. F = BIl sin 
conductor in a magnetic field

v2 BI
B6. a= = 2r centripetal acceleration D12. V= Hall voltage
r nQt

Gm1 m 2 Newton’s law of 0 I magnetic field due to a long

B7. F= D13. B=
r 2 gravitation 2πr straight wire

 0 NI magnetic field inside a long

D14. B=
l solenoid

λD fringe width in 
C1. y = D15. =N induced e.m.f.
a double-slit interference t

Vs N s ratio of secondary voltage to

diffraction grating 
C2. d sin  = n D16. primary voltage in a
equation Vp N p
transformer
1 1 1 equation for a single
C3. + =
u v f lens

E1. N = N0e−kt law of radioactive decay

ln 2
E2. t1 = half-life and decay constant
2
k

activity and the number of

E3. A = kN
undecayed nuclei
E4. E = mc2 mass-energy relationship

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Mock Exam 2013 Paper 1A 20
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