2019_physics_olevel_nov_paper2

Extracted Content: 2019_physics_olevel_nov_paper2

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Candidate Name

TIONS COUNC
SCHOOL EX AN sina Level IL
|

MBABWE
a AB General Certificate of
cS 4023/2
PHYSI
PAPER 2 Theory
NOVEMBER 2019 SESSION 2 hours 15 minutes

Candidates answer on the question papeT-

Additional materials: Electronic calculator

efore the examination.

dates 5 minutes to count pages b

Allow candi

r stapled and pages should not be removed.

This booklet should not be punched 0:
Time 2 hours 15 minutes

INSTRUCTIONS TO CANDIDATES : ; .
Write your name, centre number and candidate number in the spaces at the top of this page
and centre and candidate number in the hoxes on the top right corner of every page of this
paper. Check if the booklet has all the pages and ask the invigilator for a replacement if there

are duplicate or missing pages.
Do not fasten the booklet.

Section A

Answer all questions. .
Write your answers in the spaces provided on the question paper.
Section B

Answer any three questions.

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

capone nak FOR CANDIDATES

‘he number of marks is given in brackets [ ] at the end i

the 1 of each question.

Candidates are reminded that all quantitative answers should include appropriate units.

This question paper consists of 18 printed pages and 2 blank pages.

Copyright: Zimbabwe School Examinations Council, N2019.

© ZIMSEC N2019
ver
[Ture 0

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+ tg Name
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2
Section A

Answer all questions from this section,

(a) The total mass of a cyclist and

with a driving force of 135.'N the bicycle is 90 kg. The cyclist accelerates from rest

against a frictional force of 30 N.
Calculate the acceleration,

B)

(b) State any two factors that affect the size of the frictional force in (a).

4023/2 N2019

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Candidate Namé

irled around at a constant

ing being wh
Fig, 2.1 shows & stone attached fo 4 string
b) Fig. 4
® speed of 10 m/s.

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It ‘
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Fig. 2.1

(i) State the velocity at B and velocity at D

velocity at B
velocity at D

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4

4,

e
_ Nam Centre Number Candidate Number
4

(a) State any two reasons why concrete dam walls are usually arch shaped

(2)

stand

pbumer

Fig. 4.1

' ‘ 1
Draw arrows to show convection currents on Fig.4.1. i

urrents are produced when a liquid is heated. ,

(b) Explain how convection ¢

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4023/2 N2019

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(c) Describe heat transfer by conduction. |

(b) Calculate the amount of heat required to melt 80 g of ice at 0 °C, ‘
[specific latent heat of fusion of ice = 330 J/g] . |

heat required = J
ee

2]
()

State the effect of impurities on the melting point of ice

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P gidate Name

Ce
2 hire Number Candidate Number

6

In an experiment, a i
6 @ Plastic rod was charged by rubbing it on a piece of cloth.

State the type of charge on the cloth

(c) The charged rod was brought close to small pieces of paper.
Explain why the pieces of paper were attracted to the rod.

1

(b) Sketch an I-V characteristic graph for a filament lamp.

[2]

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Numbe,
7

te the amount of current

can

_ Caloula'
(c) A3 (resistor is connected to a 1.5 v supply

passing through the resistor.

(a) Two atoms of mass numbers 20 and 21 have a proton number of 10.

go

re er

(i) State the name given to the atoms.

1]

(b) A radioactive sample has a mass of 10 g and a half-life of 5 days.

Calculate the number of days taken for the sample to decay to 1.25 g.

4023/2 N2019

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| Section B

Answ
| er any three questions from this section,

, @ @ State the SI unit of density,

(iii) Explain why ice floats on water. .

[2]

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Candidate Name
9

h of a body in motion. |

(b) Ais 9.1 shows a velocity-time BraP

velocity

(m/s)

time (s)
Fig, 9.1
(i) Define acceleration.
{1]
(ii) Calculate the’ distance covered in 10 seconds.
[3]
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[2]

[2]

(ii) Describe how a falling body attains terminal velocity.

erimental techniques to be observed during an experiment to

(ili) Suggest good exp of an object dropped into oil.

determine terminal velocity

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Candidate Name -"

(a)

Centre Number Candidatg Nun

11

ifta load of mass 20 kg with an effort of

tol
Fig. 10.1 shows 4 pulley system used

95N.

effort 95N

(i) Name a single pulley that has the same velocity ratio as the pulley system
in Fig. 10.1.

4023/2 N2019

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Candidate Number

12

(iii) Calculate the mechanical advantage of the pul
€ pul

ley system.

[2]

(iv) Suggest why the mechanical advantage can never be greater than the velocity
ratio for any pulley system.

[2]
(b) Water in a river flows over a cliff70 m high.
(i) Calculate the change in gravitational potential energy of each kilogram of the
water. ;
» [g=10ms ]
(2]

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logram of the water hits the bottom Of the

i ki
(ii) Determine the speed at which a

cliff.

(iii) State the assumption made in (ii).

ee |

(c) (i) Name two methods of welding.

4023/2 Na019

= wel

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Candidate Number

14

(iv) Suggest, giving two reas
motherboard, ons, & method of joining a capacitor to a computer

Method

[3]

ti. (a) (i) State what happens to electromagnetic waves when they

I change medium,

2. pass through a magnetic field.

(ii) State any two uses of visible light.

[2]

(iii) Explain why the frequency of ultra violet light is greater than that of
iii

microwaves.

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(ii) Sketcha singe showing straight wavefronts for a water wave passing
vt e
normally from shallow end to deep end.
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3]

(iii) State two characteristics of a wave which will change if the water in (ii) passes
the boundary at an angle.

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Temperature measurement involves two fixed points

@

(i)

C)

Define the

1. lower fixed point,

nt and

The length of a mercury thread in a thermometer is 10 mm at ice poi
110 mm at steam point. . ;

Calculate the temperature that corresponds to 70 mm length of mercury.

(3]

Suggest, with a reason why amercury in glass thermometer cannot measure
,

melting point of carbon dioxide.

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Candidate Name Nut
|
17

12, (a) (i) Describe how electricity may be used to

1. make a permanent magnet,

(b). (i) State two differences between the magnetic properties of iron and steel,

iron steel

—

(ii) A piece of metal was found in the school yard

Describ ‘
escribe how a student may determine whether the metal is a magnet or not.

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(iti) Suggest a suitable rating for a fuse to be used on an appliance rated 800 W,
240 V.

[3]

(iv) Explain why the fuse must be connected to the live wire.

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