2025_physics_olevel_mj_paper2

Extracted Content: 2025_physics_olevel_mj_paper2

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Candidate Name Centre Number Candidate Number

KT + +
NEE al

ZIMBABWE SCHOOL |
General Certificate of Education Ordinary Level

PHYSICS 4023/2
PAPER 2 Theory 2 hours 15 minutes

JUNE 2025 SESSION

Additional materials:
Electronic 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.

TTT he ate aa 7 BWR MES iS raoea een,
This question paper consists of 18 printed pages.
Copyright: Zimbabwe School Examinations Council, J2025.

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Section A Answer all ee the question paper. Write your answers in the spaces provide

1 (a) Define
(i) acceleration,

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(ii) average speed.
[1]

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; stacle on Fig .1.1 shows the speed of a bus from the time the driver saw a0 ob

the road and applied the brakes till the bus came to a stop.

(b)

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Fig. 1.1

Calculate the average speed of the car.

[3]

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Pe eas “Fan ASL a eT ee 4 to other areas. , — istribute pressure 2 (a) Arch shapes in construction help to di rarch shapes.

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Name any two large structures which make use

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over solid beams.

[2]

(b) (i) Give two advantages of using hollow beams

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(ii) Explain one disadvantage of using wood in structures.

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3 (a) = (i) State a method of heat transfer responsible for transferring heat
from the sun to the earth.

[1]

(ii) | Explain why other methods of heat transfer are not involved in
this transfer.

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(b) Describe how blankets keep people warm.

[2]

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(i) Describe the variation of the resistance, R, with temperature, @
illustrated in Fig. 4.1.

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istor when the
(ii) Determine, from the graph, the resistance of the therm!

temperature is 80 °C.

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(b) Fig. 4.2 shows a thermistor connected in series with a 10 {2 resistor.

45V

=

10 Q thermistor
Fig. 4.2

Calculate the voltage across the thermistor when its resistance is 22.0 ().

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5 (a) Fig. 5.1 shows a strain gauge.

Strain gauge

Fig. 5.1

(i) State the type of wire that is used to make a strain gauge.

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(ii) Explain the choice given in a(i).

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(iii) | Describe what happens to the resistance when a strain gauge is
stretched.

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(iv) | Name one practical use of a strain gauge.

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6 (a) Fig.6.1 shows a circuit diagram consisting of electronic components.
ed
Fig.6.1
(i) | Name the process being demonstrated in Fig.6.1.
[1]
(ii) | Draw a potential difference against time graph that appears
across the load.
[3]

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(ili) Add a component to the circuit in Fig .6.1 for smoothening
the potential difference across the load. [1]

7 (a) _‘ Fig. 7.1 shows an experiment used to study electromagnetic induction.
——>

Fig, 7.1

(i) Give two ways of increasing the electromotive force
induced.

(ii) Describe what is observed in Fig.7.1 when the coil is moved
towards the magnet.

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(a)

(b)

W litivanee.. -

(iii) — Give any two practical applications of electromagnetic
induction.

[2]

Explain what is meant by the following terms

(i) nucleon number,

[1]

(ii) isotope.

A nuclide is represented by 73:X.

(i) Calculate the number of neutrons.

[2]
(ii) | Write another representation of an isotope of X.

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Section B Answer any three questions from this section. Write your answers on the separate answer booklet provided. 9 (a) (i) Explain the term stability of an object. [1] (ii) | State two ways in which the stability of an object can be increased. [2]

(iii) A force, F, is used to displace a cone, as shown in Fig. 9.1.

W
Fig. 9.1
Explain how the cone regains its stability. [1]

(iv) | Explain why the luggage compartment of a bus should be at the
bottom. [2]

(b) Fig. 9.2 shows a wooden log of mass | tonne being pulled by a tractor on a
rough surface.

tractor

Fig. 9.2

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(i) Draw a diagram to show the forces acting on the wooden log. [2] (ii) | Suggest why the force exerted by the tractor when pulling the wooden log on a rough surface is greater than when pulling the wooden log on a smooth surface. [1] (iii) | Calculate the acceleration of the wooden log when the force exerted by the tractor is 80 000 N and the frictional force 1s 65 000N. [g=10 m/s ] [3] (ce) Wi State the direction in which the pressure of a fluid acts. [1] (ii) Explain why very small forces are required during use of a needle. [1] (iii) A dancer of mass 48 kg is balancing on heels on a dancing floor. The area of the heel is 6.4 107° m?. Calculate the pressure exerted to the floor by the heels. [3] (d) Describe the construction of a mercury barometer. [3] 10 (a) (i) Define specific heat capacity. [1] (ii) In an experiment to measure the specific heat capacity of steel, a mass of 500 g of steel rivet is placed in a calorimeter and heated using a 50 W electrical heater. After a period of two minutes, the temperature of the rivet rises from 10 °C to 35 °C. Calculate the specific heat capacity of steel. [3] (iii) State one assumption made in calculating the specific heat capacity of the steel rivet. 1] (iv) | Explain why water is used as a coolant in engines. [2] (b) (i) Draw and label the heating curve of water starting from ice. [4] (ii) | Name one good and one bad conductor of heat. [2] 4023/2 J2025 ll ~\\/ =: _ __ _ ANOK

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(c) The pie chart in Fig.10.1 shows percentages of main energy sources, used in a mining town.

Hydro - Power
50%

Fig.10.1
(i) Determine the percentage of energy supplied by coal. [1]
(ii) | State which sources are renewable. [2]

(iii) | Give two advantages and two disadvantages of using solar

lighting system. [4]
11 (a) (i) Explain the term dispersion of light. [1]
(ii) | Copy and complete Fig. 11.1 for a colour spectrum formed by a narrow
beam of white light.
glass
prism

Fig. 11.1

[3]

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et —— alli SS ——————

[2]

(iii) | Explain why red light is at the top of the spectrum.

(b) Fig. 11.2 shows a lightning conductor used to protect a hut against lightning.

qettied charged cloud

spikes

thick cable

Fig. 11.2

(i) State, with a reason, a suitable material for the cable in Fig. 11.2. [2]
(ii) Describe, briefly, how the charge on the cloud is produced. [2]

(iii) © Explain why

1. a thick cable is used instead of a thin cable,

2. there are spikes at the top of the conductor, [2] :

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—————————————

Copy and complete Table. 11.1 which shows the three wires connected
to a three pin plug and their colour codes.

() @

Table.11.1

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(ii) State on which of the wire a fuse is connected to.

[3]
[1]

A filament lamp is connected to a 240 V supply. At maximum

(iii)
brightness a current of 12 A flows through the lamp.

1. Calculate the resistance of the lamp at maximum brightness.

2. Explain why the resistance of the filament lamp cannot be
assigned a fixed value when current is flowing.

[4]

12 (a) Fig. 12.1 shows an electric relay circuit.

radio transmitter

low current

Fig. 12.1

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re E™E™ESlcié<é‘ cm’. 3 36)— ——————

(i) Identify component X. [1]
(ii) Name materials used to make component X. [2]
(iii) | Explain why the materials in (ii) are used. [2]
(iv) | Suggest why a radio transmitter is connected to circuit B. [1]

(b) Fig. 12.2 shows a combination of logic gates.

Fig. 12.2
(i) Copy and complete Table 12.1 for the combination of logic gates in Fig.
12.2.
Table.12.1

[4]

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(ii) Fig. 12.3 shows a combination of logic gates.

—p—b»—

Fig. 12.3
Name a single logic gate which performs the same function as that
of the combination in Fig.12.3. [1]
(iii) | Suggest any one use of logic gates. [1]
(c) = (i) Describe how radioactive materials are stored. [2]

(ii) Fig. 12.4 shows a paper milling machine.

detector Y
a paper pulp

thin sheet

of paper radioactive source

lead
Fig. 12.4

Using Fig 12.4,
1. suggest the type of radiation used,

2. give a reason for your answer in (ii) 1,

3. identify the detector Y; [3]

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— ed

WT

— i ll + Y
——

(iii) | Radium-226, underwent radioactive nuclear transformation as shown in
the following equation:

226 Ra —>% Rn +; He+ energy

1. Find the values of A and B. ;
2. Name any one use of the energy released in a radioactive
nuclear transformation from the equation in e(iii). [3]

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