2024_physics_olevel_mj_paper2

Extracted Content: 2024_physics_olevel_mj_paper2

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Candidate Name Centre Number Candidate Number

=, ZIMBABWE SCHOOL EXAMINATIONS COUNCIL
. General Certificate of Education Ordinary Level
PHYSICS 4023/2

PAPER 2 Theory

JUNE 2024 SESSION

dditional materials:
Jlectronic calculator
Answer booklet

INSTRUCTIONS TO CANDIDATES

Write your name, centre number and candidate number in
the spaces at the top.

At the end of the examination fasten the answer booklet used
securely to the question paper.

INFORMATION FOR CANDIDATES

The number of marks is given in brackets [ ] at the

end of each question.

This question paper consists of two compulsory
sections, A and B.

2 hours 15 minutes

ener nn et enn ett nee etn

__FOR EXAMINER’S USE

[Section A_.
Section B

12
—

Total

Lee

This question paper consists of 14 printed pages and 2 blank pages.
Copyright: Zimbabwe School Examinations Council, J2024.

© ZIMSEC 32024

[Turn over

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1 (a)

(b)

UI

Section A

Answer all questions.

Write your answers in the spaces provided on the question paper.

State which of the following are vector quantities:

acceleration, distance, current, speed

i [2]

i)

(ii)

Describe how it is possible to obtain a resultant force of zero from two
forces of 10.0 N each.

7 ee U1]
Fig.1.1 shows two equal forces acting at 120° to each other.
10N
ee
120
el rn > 10N
Fig.
Calculate the resultant force.
[2]
4023/2 12024
WR Time
MATHS GUARDIOLA 4447852954215 ‘Co Zimsec 2024

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2 (a) Define mechanical advantage.

(b) Fig.2.1 shows a pulley system of effort 300 N.

@)

Effort

load =750 N

Fig.2.1

Find the velocity ratio of the above system.

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[1]

[1]

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4 (iD Calculate the vertical distance moved by the effort in order to lift the load through 30.0 cm. [3] 3 (a) State the type of energy in the following: i) torch cell ee [1] (iD) compressed spring en - [1] (b) @ State what is meant by renewable energy source, ae [1] (i) Explain why it is important to use renewable energy source. - a _ 2] MATHS GUARDIOLA +447852954215

AAA Ay nee

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an

(a) Define specific latent heat.

_ _ {1]
(b) Fig.4.1 shows a heating curve for a substance, which was a solid before heating.
ve |
Yo __&
Q x
/
/
erent tment
P t/s
Fig.4.1
Name the process that occurs at QX and YZ.
QX _ _
YZ _ . 2]
(c) Explain why the heating element is placed at the bottorn in an electric kettle.
. 2

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5 (a) (b) () 6 {a) (b)

Describe how an echo is produced.

a (1

A bat flying towards a wall produces a sound wave directed towards the wall. The
bat hears the echo of the sound it had produced 25 ms later.

Given that the speed of sound produced by the bat is 330 m/s, determine the
distance of the wall from the bat.

[3]
State one application of echoes.
_ [1]
State two advantages of a diesel engine over a petrol engine.
_ ee _ [2]
Describe social implications of using fuels.
A — 6

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(a) Explain what is meant by @ electromotive force, fy Gi) current. (1

(b) Fig 7.1 shows a circuit diagram used to determine the resistance of a load R.

en |e

R
Fig 7.1
@ On the diagram, indicate in the circles provided, the voltmeter, V,
and the ammeter, A.
[1]
(619) Explain how this set up can be used to determine resistance.
_ _ _ Bi

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A0Q23/2 12024

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(a)

(b)

Explain what is meant by the following terms as used in radioactivity:

() half-life

(¢)) radioactive decay

The initial mass of radioactive isotope of half life 6 minutes is 20 g.

Find the mass of the isotope remaining after 18 minutes.

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[1]

{1

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(a) (b)

Section B
Answer any three questions from this section.
Write your answers on the separate answer booklet provided.
Define displacement. [1]
Fig.9.1 shows a velocity time graph for a motorcycle.

30
1 f
i

speed / ms

: : D
5 10 15 20 25 30
time /s
Fig.9.1
@ From the graph describe qualitatively the motion of the motor cycle from O
to D. [4]
(ii) Calculate the average speed of the motor cycle. [3]

A feather is plucked off an eagle at a height of 200 m above the ground. Fig.9.2
shows how the speed of the feather varies with time as it falls to the ground.

-l
vis

B Cc
O —>
t/s
Fig.9.2
@ Name the downward force acting on the feather. {1]
(c) State any upward force acting on the feather. [1]

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(ili)

@ @
Gi)

(iii)
0 @ @
(ii)

10

Describe qualitatively the motion of the feather up to a time it
reaches the ground. [4]

Define a vector quantity. {1]

Forces of 15.0 N and 7.0 N both act at the same point but their
direction can be varied. Calculate their

1. greatest possible resultant,

2. smallest possible resultant. [2]
If the two forces in (ii) are at right angles, find their resultant. [3]
Explain Hooke’s law. (1]

Fig.10.1 shows a spring mass system with an original length of 10.0 cm
and an extension of 0.5 em.

=
|
i
|

mass = 50 g

0.5 cm extension

a

Fig.10.1

1. Calculate the spring constant.

2. State any assumption made in (ii)1.
3. Name any additional apparatus not shown in Fig.10.1 that would

be used to take readings that will help to find the spring constant.

[4]

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(b)

@
Gi)

(iii)

Define inertia and momentum. [2]

Describe and explain what would happen to a rock if it is launched
with a speed of 10 m/s in a vacuum. [2]

Fig.10.2 shows a 300 g bird on a building 100 m tall.

Fig.10.2

If the bird is shot dead and falls down,
calculate the

1. force it exerts on the ground,

2. velocity the dead bird attains when it reaches the ground. [4]

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11.

(©)

(a)

(b)

12

Fig.10.3 shows a car moving round a bend.

(i)
(ii)

(iii)
(iv)

Gi)

(iii)

(ii)

Mr Zulu records details of electricity consumption in a week of some appliances in

Fig.10.3

State what provides the centripetal force.

If the car is travelling at constant speed round the bend, explain
how the centripetal acceleration is produced.

If oil is spilt on the road in Fig.10.3, describe the motion of the car.

State one advantage and one disadvantage of friction.

Name any three regions of the electromagnetic spectrum.

Calculate the frequency of the radiation with a wavelength of
1.0 x 10714m.

Explain how and why microwaves can cause damage to living cells
or even kill living cells.
Explain what is meant by induced magnetism.

Describe, with the aid of a diagram, how a magnetic material can
be magnetised by using a solenoid.

(2

4]

his home. The details are shown in the table.

ppliance ower rating/kW pe entiched Energy used/k Wh
stove 3.50 12.0
[PV and light (0.86 36.0 a

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i)

(ii)

(iii)

12. (a) (i)
(ii)

(i

Copy and complete the table by calculating the energy used by each
appliance. [2]

Mr Zulu uses prepaid electricity token. At the beginning of the
week the meter reading showing the remaining electrical energy
in his last prepaid token was 843.2 kWh.

Calculate the meter reading at the end of the week. [2]

The cost per unit of energy used is $0.25. Calculate the energy
cost of the appliance that consumed the most energy that week. [2]
Explain why transformers use alternating voltage. {1

With the aid of a diagram, describe the structure of a step-up
transformer. BB

Describe and explain the advantages of high voltage transmission. [2]

(b) Fig.12.1 shows a combination of logic gates.

(ii)
(iii)

tat
EN emer >
an ” ) >>
Fig.12.1
Name the two types of logic gates shown in Fig.12.1. [2]
Draw a truth table for the circuit diagram in Fig.12.1. [3]

Give a single gate that could be used to perform the same function
as the circuit diagram in Fig.12.1. fl]

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(c)

Fig.12.2 shows radiation emitted by a radioactive isotope.

x xX xX xX
| | radiations x xX XxX xX
i /
| =>
XX X Xx
radioactive source
Fig.12.2
@ Name one type of radiation emitted by radioactive isotopes. {1]

Gi Copy Fig.12.2 and show how radiations are deflected when
they pass through a magnetic field as shown in Fig.12.2. [3]

(ili) Give two particles that are found in the nucleus of an atom. [2]

(iv) Fig.12.3. shows a cathode ray tube.

1. Name the process by which electrons are emitted from the cathode.

2. Describe how electrons are accelerated inside the tube. [2]

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