YEAR 10 PHYSICS TIME: 2hours

DEPARTMENT FOR CURRICULUM, RESEARCH, INNOVATION AND LIFELONG LEARNING Directorate for Learning and Assessment Programmes Educational Assessment Unit

Annual Examinations for Secondary Schools 2018

YEAR 10

PHYSICS

Track 2

TIME: 2hours

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=ma

W = mg

Motion

Average

Speed

=

total distance total time

v = u + at

(u + v) t s= 2 v2 = u2 + 2as

s

=

ut

+

1 2

at2

Momentum = m v

Q = It

V = IR

E = QV

Electricity Waves Others

R /

RTOTAL = R1 + R2 + R3

real depth = apparent depth v = f

1 f=T

1 Area of triangle = 2 bh

E =IVt

1

11

RTOTAL = R1 + R2

speed of light in air = speed of light in medium

magnification

=

hi ho

=

image object

height height

1 Area of Trapezium = 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

This document consists of 10 printed pages.

Total

100

Physics ? Year 10 ? Track 2 ? 2018

Page 1 of 10

SECTION A Each question carries 8 marks. This section carries 40 marks of the total marks for this paper.

1. A vibrating tuning fork is placed close to a microphone as shown in Figure 1.

microphone tuning fork

oscilloscope

a) Are sound waves transverse or longitudinal?

Figure 1

_______________________________________________________________________ [1]

b) Explain, in terms of movement of air particles, how sound reaches the microphone. _______________________________________________________________________ [1]

c) The speed of sound in air is 340 m/s. Given that the wavelength of the waves is 170 cm, calculate the frequency of the sound produced. __________________________________________________________________________ _______________________________________________________________________ [2]

d) Calculate the periodic time of the sound waves. _______________________________________________________________________ [1]

e) Explain why the sound produced can be heard by humans. __________________________________________________________________________ _______________________________________________________________________ [1]

f) The waveform produced by the vibrating tuning fork is shown in Figure 2.

Figure 2

Figure 3

Figure 4

i) On Figure 3, draw the waveform produced by the same tuning fork vibrating

with half the amplitude of the tuning fork in Figure 2.

[1]

ii) On Figure 4, draw the waveform produced by a different tuning fork vibrating

at half the frequency but with the same amplitude as in Figure 2.

[1]

Page 2 of 10

Physics ? Year 10 ? Track 2 ? 2018

2. Shania builds a model of a balloon propelled cart as shown in Figure 5. She attaches a balloon to the cart and inflates it. The cart and the balloon are initially at rest. The balloon is released and the cart moves rapidly to the right with a speed of 1.4 m/s. The total mass of the cart and the balloon is 200 g.

balloon

air rushing out

movement cart

Figure 5

a) What is the total momentum before the balloon is released? __________________________________________________________________________ [2]

b) What is the total momentum after the balloon is released? Explain. _____________________________________________________________________________ __________________________________________________________________________ [2]

c) Calculate the momentum of the cart as it travels at 1.4 m/s. _____________________________________________________________________________ __________________________________________________________________________ [1]

d) Given that the air flows out of the balloon with a speed of 24 m/s, calculate the initial mass of air present inside the balloon. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ __________________________________________________________________________ [2]

e) Newton's 3rd law can be used to explain how this model works. State this law. _____________________________________________________________________________ __________________________________________________________________________ [1]

Physics ? Year 10 ? Track 2 ? 2018

Page 3 of 10

3. The circuit in Figure 6 consists of a cell, three identical filament lamps A, B and C and four switches S1, S2, S3 and S4.

S1 A

S2 B

S4

C

S3 Figure 6

a) State which switches need to be closed so that: i) only A and C light up;

____________________________________________________________________ [1] ii) only A and B light up;

____________________________________________________________________ [1] iii) all the three filament lamps light up.

____________________________________________________________________ [1]

b) Kelly connects a constantan wire XY in the circuit shown in Figure 7. When she closes the switch, she notices that current flows through the circuit.

constantan wire

A ammeter

X

Y

Figure 7

State what will be observed on the ammeter if: i) she replaces wire XY with a solid plastic cable;

____________________________________________________________________ [1] ii) she replaces wire XY with the same type of wire having double the length;

____________________________________________________________________ [1] iii) she connects an identical constantan wire in parallel with wire XY.

____________________________________________________________________ [1] c) Kelly tests whether the constantan wire in Figure 7 is an ohmic conductor. Name

TWO other components she requires to carry out this experiment.

_______________________________________________________________________ [2]

Page 4 of 10

Physics ? Year 10 ? Track 2 ? 2018

4. A parallel beam of light is incident on two different lenses as shown in Figure 8.

A

B

Figure 8

a) Fill in: Lens A is called a _____________________ lens, while lens B is called a

_____________________ lens.

[2]

b) Draw the path taken by the beam of light as it travels through each lens. [2]

c) One of the lenses in Figure 8 is used to find its approximate focal length using a distant object as shown in Figure 9. Which of the two lenses can be used for this experiment? _______________________________________________________________________ [1]

distant object

lens

image

Figure 9

d) Explain briefly how this experiment is carried out. State clearly which distance is approximately equal to the focal length of the lens. __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ _______________________________________________________________________ [2]

e) The image in Figure 9 is inverted. State ONE other property of the image formed. _______________________________________________________________________ [1]

Physics ? Year 10 ? Track 2 ? 2018

Page 5 of 10

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