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Physics – Year 11 – Track 2 – 2019 Page 1 of 12
DEPARTMENT FOR CURRICULUM,
LIFELONG LEARNING AND EMPLOYABILITY
Directorate for Learning and Assessment Programmes
Educational Assessment Unit
Annual Examinations for Secondary Schools 2019
YEAR 11 PHYSICS TIME: 2 hours
Name: _____________________________________ Class: _______________
Answer ALL questions in the spaces provided on the Examination Paper.
All working must be shown. The use of a calculator is allowed. Where necessary take the acceleration due to gravity g = 10 m/s2.
Density m = ρ V
Pressure P = ρ g h F = P A
Moments Moment = F × perpendicular distance
Energy PE = m g h KE =
1
2mv2 Work Done = F s
Work Done = Energy Converted E = P t
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
P = I V R ∝ 𝐿/𝐴 E = I V t
RT = R1 + R2 + R3 1
RT=
1
R1+
1
R2
Electromagnetism N1
N2=
V1
V2
Heat ΔQ = m c Δθ
Waves
η =real depth
apparent depth η =
the speed of light in air
the speed of light in medium
v = f λ
f =1
T
m =hi
ho=
image distance
object distance
Radioactivity A = Z + N
Question 1 2 3 4 5 6 7 8 9 10 11 Theory Multiply
by 0.68 Prac Final Mark
Mark 10 10 10 10 10 10 10 10 15 15 15 125 85 15 100
Score
Track 2
Page 2 of 12 Physics – Year 11 – Track 2 – 2019
Section A.
This section has 8 questions. Each question carries 10 marks.
Figure 1 shows a pack of 10 microscope slides.
An experiment is carried out to determine the density of the glass used to make
microscope slides.
i. Given that the length of a pack of microscope slides is 7.5 cm, the width is 2.5 cm and
the height is 1.0 cm, determine the total volume of this pack.
______________________________________________________________________
___________________________________________________________________ [2]
ii. Calculate the volume of one microscope slide.
___________________________________________________________________ [1]
iii. Why is it better to measure 10 slides rather than one slide?
___________________________________________________________________ [1]
iv. Given that the mass of one slide is 4.75 g, calculate the density of glass.
______________________________________________________________________
___________________________________________________________________ [2]
A bottle opener is used as shown in Figure 2. An upward force of 35 N is applied at a
distance of 10 cm from the pivot P. The downward force F on the bottle opener by the
cap is 1.5 cm from the pivot P.
i. Calculate the moment produced by the 35 N force acting about the pivot P.
___________________________________________________________________ [2]
ii. Calculate the value of force F.
______________________________________________________________________
___________________________________________________________________ [2]
10 slides
Figure 1
Figure 2
Physics – Year 11 – Track 2 – 2019 Page 3 of 12
Figure 3 shows one way of using water to generate electricity.
Fill in the missing words in the boxes. [3]
Is this source of energy renewable or non-renewable?
___________________________________________________________________ [1]
Name one advantage and one disadvantage of using this source of energy.
Advantage _________________________________________________________
Disadvantage _______________________________________________________ [2]
If the water reservoir is at a height of 20 m above the generator and the density of
water is 1000 kg/m3, calculate the pressure caused by the water at the generator
house.
______________________________________________________________________
___________________________________________________________________ [2]
The total pressure registered at the generator house is 308 250 Pa. Why is this value
different from the pressure calculated in the question above?
___________________________________________________________________ [1]
Why is the dam wider at the bottom than at the top?
___________________________________________________________________ [1]
i. This water has
_______________________
energy due to its height.
iii. The generator produces
_______________________
energy.
ii. As the water falls, its
_______________________
energy increases.
Figure 3
Page 4 of 12 Physics – Year 11 – Track 2 – 2019
Figure 4 shows a helicopter moving horizontally at a constant speed of 60 m/s. When it
arrives above point X, the helicopter stops and the pilot drops a parcel through a height
of 80 m.
Calculate the time taken for the helicopter to travel 480 m horizontally.
___________________________________________________________________ [2]
State the acceleration of the falling parcel (ignore air resistance): ____________ [1]
Calculate the time taken for this parcel to reach the ground.
______________________________________________________________________
___________________________________________________________________ [2]
Calculate the velocity with which the parcel hits the ground.
______________________________________________________________________
___________________________________________________________________ [2]
One way to reduce the force acting on the parcel on impact is to reduce the velocity
with which the parcel hits the ground. How can this be achieved?
___________________________________________________________________ [1]
Suggest another way to reduce the force acting on the parcel on impact with the
ground. Explain your reasoning.
______________________________________________________________________
___________________________________________________________________ [2]
Ruth and Jacob are standing on their skateboards as shown
in Figure 5. They are at rest on level ground.
Ruth pushes Jacob with a force of 12 N to the right
(forward). State the size and direction of the force acting
on Ruth.
____________________________________________ [2]
Which of Newton’s laws did you apply in part a)?
_____________________________________________ [1]
60 m/s
80 m distance = 480 m
Figure 4
Ruth
50 kg
Jacob
60 kg
Figure 5
Physics – Year 11 – Track 2 – 2019 Page 5 of 12
Calculate Jacob’s momentum if he moves with a velocity of 0.5 m/s and his mass is
60 kg.
___________________________________________________________________ [2]
State the value of Ruth’s momentum: __________________________________ [1]
Calculate Ruth’s velocity, given that her mass is 50 kg.
______________________________________________________________________
___________________________________________________________________ [2]
State the value of the total momentum immediately after Ruth pushes Jacob. Explain.
______________________________________________________________________
___________________________________________________________________ [2]
A radiation detector is connected to a counter and used to investigate a radioactive stone.
This stone is wrapped in various materials and different readings are recorded in counts
per minute as shown in Figure 6.
Figure 6
Give the name of a suitable radioactive detector.
___________________________________________________________________ [1]
What causes the reading of 30 counts per minute when no stone is present?
___________________________________________________________________ [1]
Calculate the corrected count-rate, in counts per minute, of the stone when it has no
wrapping.
___________________________________________________________________ [1]
State the type, or types, of radiation that this stone is emitting. Explain your reasoning.
______________________________________________________________________
______________________________________________________________________
___________________________________________________________________ [3]
The rock is now placed in a thick lead container. Suggest a value for the count-rate
you would expect in this case.
___________________________________________________________________ [1]
Radiation
detector
92
Page 6 of 12 Physics – Year 11 – Track 2 – 2019
The half-life of this radioactive stone is 2 days. Estimate the corrected count-rate
obtained from this stone after 4 days.
______________________________________________________________________
___________________________________________________________________ [2]
Give ONE reason why this stone should not be used in a smoke detector.
___________________________________________________________________ [1]
An electric plug is shown in Figure 7.
State the name of the wires labelled A, B and C.
A -_____________________________
B -_____________________________
C -_____________________________ [3]
Name TWO safety features present in the plug.
__________________________________________
__________________________________________ [2]
A student uses this plug with an electric heater rated 2.6 kW. Given that the voltage
supplied is 230 V, calculate the current flowing through this heater.
___________________________________________________________________ [2]
Suggest a suitable value for the fuse in the plug.
___________________________________________________________________ [1]
Calculate the cost of using this heater for 8 hours if electricity costs 17c per kWh.
______________________________________________________________________
___________________________________________________________________ [2]
The Earth is the third planet from the sun.
Name the TWO planets closest to Earth’s orbit.
___________________________________________________________________ [2]
Name the force that keeps planets in orbit around the sun.
___________________________________________________________________ [1]
A space probe takes approximately 90 days to reach Mars when travelling at 8000 m/s.
Calculate the distance travelled by the rocket.
______________________________________________________________________
___________________________________________________________________ [3]
A
B
C
Figure 7
Physics – Year 11 – Track 2 – 2019 Page 7 of 12
Some equipment used for space missions uses ‘wireless
power transfer’. This involves transmission of electrical
energy from a power source to an electrical load between
two coils.
i. Does the input current need to be alternating or direct?
___________________________________________________________________ [1]
ii. Briefly explain how power is transmitted between the two coils in Figure 8.
______________________________________________________________________
______________________________________________________________________
___________________________________________________________________ [3]
Figure 9 shows an electric motor driving a conveyor belt. A 15 kg suitcase takes 12 s to
go up from A to B.
Calculate the weight of the suitcase.
_________________________________ [1]
Calculate the gravitational potential
energy of the suitcase at point B.
____________________________________
_________________________________ [2]
The suitcase slips from point B to fall to the ground at point C. Calculate the
maximum velocity of the suitcase just before hitting the ground. (Assume that there
is no air resistance.)
______________________________________________________________________
______________________________________________________________________
___________________________________________________________________ [2]
The electric motor is powered by an input voltage of 230 V and a current of 1.5 A.
Calculate the electrical energy input to the motor in 12 s.
______________________________________________________________________
___________________________________________________________________ [2]
Calculate the efficiency of the conveyor belt.
______________________________________________________________________
___________________________________________________________________ [2]
Explain why the efficiency of the motor is not 100%.
___________________________________________________________________ [1]
power source
electrical load
coils
aeroplane
5.5 m
motor
suitcase
C
B
conveyor
belt
8.5 m
A
Figure 8
Figure 9
Page 8 of 12 Physics – Year 11 – Track 2 – 2019
Section B.
This section carries 45 marks. Each question carries 15 marks.
This question is about Electricity and Magnetism.
Luke uses the setup in Figure 10 to investigate how the amount of weights supported by
an electromagnet depends on the current flowing.
Mark the direction of the current in the circuit. [1]
State the magnetic pole formed at end A. _______________________________ [1]
A component that can change the current flowing is needed for the experiment to be
carried out. Name this component and draw its symbol on Figure 10.
___________________________________________________________________ [2]
Underline the correct word:
The electromagnet core is made of iron because iron (can, cannot) be easily
magnetised and demagnetised. [1]
The following table shows the results of the experiment.
Weight Added / N 0 1 2 3 4 5
Current / A 0.05 0.15 0.25 0.35 0.45 0.55
i. Plot a graph of Weight Added / N (y-axis) against Current / A (x-axis). [5]
ii. Use your graph to find the current needed to support an additional weight of 3.2 N.
___________________________________________________________________ [1]
iii. Underline the correct word:
The electromagnet supports heavier weights if Luke (decreases, increases) the
number of turns and (decreases, increases) the current. [2]
iv. The battery is reversed. Would the same results be expected? Explain.
______________________________________________________________________
___________________________________________________________________ [2]
Soft iron core
Weight
added
Figure 10
Soft iron bar
12 V
Physics – Year 11 – Track 2 – 2019 Page 9 of 12
Page 10 of 12 Physics – Year 11 – Track 2 – 2019
This question is about Electricity.
As a polythene rod is rubbed with a cloth, the rod becomes charged.
Fill in:
The particles that are transferred from the cloth to the polythene rod are called
___________________. The polythene rod ends up with a ___________________
charge as it ends up with an excess of these particles. However, the cloth acquires a
________________charge as it has a lack of these particles. [3]
Four identical bulbs are connected to a four-cell battery, as shown in Figure 11.
The output voltage of each cell is 1.5 V.
i. Calculate the total voltage of the battery.
___________________________________________________________________ [1]
ii. Each bulb has a resistance of 100 Ω. Calculate the total resistance of bulbs A,B and C.
___________________________________________________________________ [1]
iii. Calculate the total resistance of the four bulbs.
______________________________________________________________________
___________________________________________________________________ [2]
iv. Calculate the total current flowing through the circuit.
______________________________________________________________________
___________________________________________________________________ [2]
v. State which bulb is the brightest. Give a reason for your answer.
_____________________________________________________________________
___________________________________________________________________ [2]
Figure 11
Physics – Year 11 – Track 2 – 2019 Page 11 of 12
Philip investigates the relationship between the voltage across a conducting material
and the current through it. He obtains the graph shown in Figure 12.
Figure 12
i. Using the graph, explain why the conducting material obeys Ohm’s law.
______________________________________________________________________
___________________________________________________________________ [2]
ii. Fill in:
The gradient of the graph is equal to the ____________________ of the conducting
material. [1]
iii. Calculate the gradient of the graph.
______________________________________________________________________
___________________________________________________________________ [1]
This question is about Waves.
Jessica and Michael go for a day by the pool. They observe water waves in the pool
and would like to calculate their average speed. Michael decides to produce some
straight waves using a wooden bar.
i. Write down the remaining steps required (2, 3, 4) in the correct order.
They use the equation Speed = Distance/time.
They stop the stopwatch when the wavefront arrives at the other end.
They measure the length of the pool using a tape measure. 1
They lower the wooden bar in the pool to produce a wavefront and
start the stopwatch at the same time.
[3]
ii. Name TWO precautions they take during this experiment.
______________________________________________________________________
___________________________________________________________________ [2]
Voltage / V
Current / A
Page 12 of 12 Physics – Year 11 – Track 2 – 2019
At the edge of the pool, the wavefronts
pass through a gap as shown in Figure 13.
i. Draw the pattern of the wavefronts after
passing through the gap. [1]
ii. Calculate the wavelength of the waves if
they are moving at 0.25 m/s and have a
frequency of 0.5 Hz.
______________________________________________________________________
___________________________________________________________________ [2]
As Jessica is swimming underwater, she looks up and notices that the bottom of the
pool is being reflected by the water surface. This is due to total internal reflection.
i. Complete Figure 14 to show the path of the light ray undergoing total internal
reflection. Label the angle of incidence ‘i’ and the angle of reflection ‘r’. [3]
ii. Name one condition required for total internal reflection to occur.
___________________________________________________________________ [1]
Michael calls Jessica who is standing against a wall at a certain distance. Figure 15
shows the molecules of air at one instant as a sound wave passes through the air.
i. How many full wavelengths are shown in Figure 15? _______________________ [1]
ii. Michael hears an echo of his own voice 0.60 s later. Given that the speed of sound in
air is 340 m/s, calculate the distance between Michael and the wall.
______________________________________________________________________
___________________________________________________________________ [2]
Air
Water
Jessica’s eye
Figure 14
Figure 15
Direction of wave travel
Figure 13
