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Physics – Form 4 Secondary – Track 2 – 2016 Page 1 of 10
DIRECTORATE FOR QUALITY AND STANDARDS IN EDUCATION
Department for Curriculum Management
Educational Assessment Unit
Annual Examinations for Secondary Schools 2016
FORM 4 PHYSICS TIME: 1h 30min
Name: ________________________________ Class: _________________
INFORMATION FOR CANDIDATES
• Where necessary take acceleration due to gravity ‘g’ to be 10 m/s2.
• The use of a calculator is allowed.
• The number of marks for each question is given in brackets at the end of each question.
• You may find these equations useful:
Force F = m a W = m g
Motion Average Speed =
total distance
total time s =
(u + v) t
2 s = ut +
1
2at2
v = u + at v2 = u2 + 2as Momentum = m v
Electricity
Q = I t V = I R E = Q V
R ∝ 𝐿/𝐴 E = I V t
RTOTAL = R1 + R2 + R3 1
RTOTAL=
1
R1+
1
R2
Waves
η =real depth
apparent depth η =
speed of light in air
speed of light in medium
v = f λ
f =1
T
magnification =hi
ho=
image height
object height
Others Area of triangle =1
2bh Area of Trapezium =
1
2(a + b)h
INSTRUCTIONS TO CANDIDATES
• Use blue or black ink. Pencil should be used for
diagrams only.
• Read each question carefully and make sure that
you know what you have to do before starting your
answer.
• Answer ALL questions.
• All working must be shown.
For Examiner’s Use Only
Question Max Mark
1 8
2 8
3 8
4 8
5 8
6 15
7 15
8 15
Written 85
Practical 15
Total 100
This document consists of 10 printed pages.
Track 2
Page 2 of 10 Physics – Form 4 Secondary – Track 2 – 2016
SECTION A
Each question carries 8 marks. This section carries 40 marks of the total marks for this paper.
1. Figure 1 shows a sound wave travelling through air from a loudspeaker to a human ear.
Figure 1
a) On the diagram above, label a compression with a ‘C’ and a rarefaction with an ‘R’. [2]
b) Indicate, on the diagram, one complete wavelength using its correct symbol. [1]
c) How many complete waves are shown in the diagram?
___________________________________________________________________________[1]
d) The distance between the loudspeaker and the ear is 16.5 m. It takes 0.05 seconds for a sound
wave to reach the ear. Calculate the speed of sound in air.
_____________________________________________________________________________
___________________________________________________________________________[2]
e) Calculate the frequency in Hz of this sound wave.
_____________________________________________________________________________
___________________________________________________________________________[2]
2. A two euro coin rests at the bottom of a pool of water, as shown in Figure 2.
Figure 2
a) On the diagram, draw the path followed by a ray of light from the coin to the eye. [2]
b) Underline: The speed of the ray of light as it emerges into the air (increases, decreases, remains
the same). The image of the coin is (real, virtual). [2]
Physics – Form 4 Secondary – Track 2 – 2016 Page 3 of 10
c) Give ONE reason why the ray of light bends as it emerges from the water.
_____________________________________________________________________________
___________________________________________________________________________[2]
d) The coin appears at a depth of 1.5 m when viewed from above. Given that the refractive index
of water is 1.33, calculate the real depth of the pool of water.
_____________________________________________________________________________
___________________________________________________________________________[2]
3. Police use radar guns to determine the speed of cars along the road. The microwave beam emitted
by the radar gun gets reflected off the moving car and the difference between the outgoing and
the incoming frequencies of the microwaves is used to determine the speed of the car.
a) Is it possible for a driver to see and avoid the microwave beam? Why?
___________________________________________________________________________[2]
b) State ONE property that electromagnetic waves have in common.
_____________________________________________________________________________
___________________________________________________________________________[1]
c) A radar speed trap shows a change of frequency
of 3000 Hz when used to measure the speed of a
car. Use the graph to find the speed of the car.
_______________________________________ [1]
d) If the speed limit is 60 km/h, will the police issue
a ticket to this car? Show your calculations.
__________________________________________
___________________________________________________________________________[2]
e) If the radar gun operates at a frequency of 10700 MHz, calculate the wavelength of the waves
used. The speed of light is 300 000 000 m/s.
_____________________________________________________________________________
___________________________________________________________________________[2]
Figure 3
Page 4 of 10 Physics – Form 4 Secondary – Track 2 – 2016
4. A car is driven along a straight road. The graph shows how the velocity of the car changes from
the moment the driver sees a very slow-moving queue of traffic ahead.
Figure 4
a) Using the graph or otherwise, calculate the deceleration of the car between points A and B.
_____________________________________________________________________________
___________________________________________________________________________[2]
b) Calculate the distance covered by the car in the first 10 seconds.
_____________________________________________________________________________
___________________________________________________________________________[2]
c) Calculate the average speed of the car and draw a line to indicate this speed on the graph.
___________________________________________________________________________[2]
d) After the 10 seconds shown on the graph, the driver accelerates and reaches a speed of 18 m/s
in a distance of 200 m. Calculate the time it took the car to cover this distance.
_____________________________________________________________________________
_____________________________________________________________________________
___________________________________________________________________________[2]
A
B C
Physics – Form 4 Secondary – Track 2 – 2016 Page 5 of 10
5. Julia was investigating current flow through a lamp.
Figure 5
a) In the space provided, draw the circuit diagram for this setup using the correct circuit symbols.
[2]
b) The resistance of the lamp when brightly lit is 15 . Calculate the current in Amps flowing
through the lamp if the potential difference measured by the voltmeter is 1.5 V.
___________________________________________________________________________[2]
c) Another lamp that has double the resistance of the first lamp is connected in parallel to the
first lamp. Calculate the total resistance of the two lamps.
_____________________________________________________________________________
___________________________________________________________________________[2]
d) Underline: The voltmeter reading will (increase, decrease, remain the same) when the second
lamp is connected in parallel to the first lamp. [1]
e) Explain why a lamp does not obey Ohm’s law.
_____________________________________________________________________________
___________________________________________________________________________[1]
Page 6 of 10 Physics – Form 4 Secondary – Track 2 – 2016
SECTION B
Each question carries 15 marks. This section carries 45 marks of the total marks for this paper.
6. Julia was investigating how the current through a coil
of wire changes with the voltage across it. She sets up
the apparatus as shown in Figure 6.
a) The multimeter labelled X is being used as an
___________________ and is connected in
___________________. [2]
b) The multimeter labelled Y is being used as a
___________________ and is connected in
___________________. [2]
c) Using numbers from 3 to 6, list in the correct order the steps Julia must take to carry out the
experiment.
Set the rheostat to maximum resistance. 1
Adjust the rheostat to a new resistance value.
Switch on the circuit and take the initial current and voltage readings. 2
Record the voltage and current readings with the new rheostat setting.
Plot a graph of Current against Voltage.
Repeat the process a number of times to get at least five different readings.
[2]
d) During the experiment the data was collected in the following table.
Voltage V / V 0 1 2 3 4 5 6
Current I / A 0 0.2 0.4 0.6 0.8 1.0 1.2
Plot a graph of Current on the y-axis against Voltage on the x-axis. [4]
e) Use the graph to find the value of the
i) current I in amps when the voltage is 3.5 V _________________________________ [1]
ii) voltage V in volts when the current is 0.3 A _________________________________ [1]
f) From the graph, calculate the resistance R in ohms of the wire.
___________________________________________________________________________[2]
g) Does the resistance wire obey Ohm’s law?
___________________________________________________________________________[1]
X
Y
Figure 6
Physics – Form 4 Secondary – Track 2 – 2016 Page 7 of 10
I / A
Graph of current I / A against voltage V / V
0
0.2
0.6
0.8
1.0
0
0.4
1.2
1 2 3 4 5 6
0.5
0.3
0.1
0.7
0.9
1.1
7 8
V / V
Page 8 of 10 Physics – Form 4 Secondary – Track 2 – 2016
7.
a) Peter was driving home after a very long day of work. He spots a hedgehog crossing the road
and applies the brakes to stop just next to the hedgehog.
Figure 7
At A, Peter is travelling at a uniform velocity of 15 m/s. When he arrives at B he sees a
hedgehog on the road at E. Peter starts to brake at C and finally comes to a complete stop at
D.
i) What is Peter’s velocity at B? __________ m/s. [1]
ii) The time taken to cover the distance BC is called the _____________________ time. [1]
iii) Distance CD is the braking distance. Which distance is the stopping distance?
____________ . [1]
iv) Name ONE factor which affects the distance BC.
________________________________________________________________________ [1]
v) Name ONE factor which affects the distance CD.
________________________________________________________________________ [1]
vi) The car came to a complete stop in 1.5 s. Calculate the deceleration of the car.
__________________________________________________________________________
________________________________________________________________________ [2]
vii) If the total mass of Peter and his car is 900 kg, calculate the braking force applied.
__________________________________________________________________________
________________________________________________________________________ [2]
Figure 8
b) An empty train cargo wagon of mass 10,000 kg is released from the engine and moves with a
velocity of 4 m/s towards a stationary wagon of mass 30,000 kg. After collision the two
wagons join together.
A B C D E
A B
Physics – Form 4 Secondary – Track 2 – 2016 Page 9 of 10
i) Calculate the momentum of wagon A before collision.
__________________________________________________________________________
__________________________________________________________________________
________________________________________________________________________ [2]
ii) What is the total momentum of the two wagons after collision?
________________________________________________________________________ [1]
iii) What is the total mass of the two wagons after collision?
________________________________________________________________________ [1]
iv) Calculate the common velocity with which the two wagons move after collision.
__________________________________________________________________________
________________________________________________________________________ [2]
8. Elizabeth and Neville are investigating the properties of a lens and a prism.
a) Elizabeth shines a ray of white light
through a prism.
i) Complete the ray diagram to show how
the red ray of the spectrum forms on the
screen. Label clearly. [1]
ii) What is this effect called?
________________________________________________________________________ [2]
iii) Name ONE example where this happens in nature.
________________________________________________________________________ [1]
b) Neville is given a converging lens. He uses it to focus a distant object on a screen. By using
numbers from 2 to 5, arrange in order the steps he needs to follow to find an approximate
value for the focal length of the lens.
The convex lens is cleaned with a fine cloth. 1
A screen is placed behind the lens.
Lens is placed facing a distant object.
Screen is moved until a sharp image is obtained.
The distance between the screen and lens is measured.
[4]
White LightGlass Prism
Screen
Figure 9
blue
Figure 10
Page 10 of 10 Physics – Form 4 Secondary – Track 2 – 2016
c) Neville uses this lens to obtain a sharp image on a screen of an object that is placed in front
of the lens.
Figure 11
i) On the diagram above, mark the principal focus F of the lens. [1]
ii) Calculate the focal length of the lens.
________________________________________________________________________ [1]
iii) Underline: The image of the object obtained on the screen is (real, virtual) and
(upright, inverted). [2]
iv) Calculate the height of the image.
________________________________________________________________________ [1]
v) The magnification of a lens is found using the equation
magnification =image height
object height
If the object height is 8 cm, calculate magnification of lens.
__________________________________________________________________________
__________________________________________________________________________
________________________________________________________________________ [2]
Scale: 1 square = 2 cm
