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ZIMSEC O Level · 4023/1 · N2024

Physics Paper 1 November 2024

Questions
34 of 35
Time allowed
60 min
Syllabus code
4023/1

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Questions
34
Pass mark
21
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Answer every question in the printed order, get marked at the end, then see the answers.

The questions

Question 1

Measurement
Which instrument is used to accurately measure the diameter of a tungsten wire?
  1. Avernier calipers
  2. Bmicrometer screw gauge
  3. Cmetre rule
  4. Dtape measure

Question 2

Measurement
Which one is a base unit?
  1. AAmpere
  2. BNewton
  3. CVolt
  4. DWatt

Question 3

Measurement
The diagram shows a measuring cylinder with water. A stone is gently lowered into the water and the reading rises to 35 cm3. What is the volume of the stone?
  1. A0.57 cm3
  2. B1.75 cm3
  3. C15.00 cm3
  4. D55.00 cm3

Question 4

Kinematics
The graph shows the variation of velocity with time of a car. What is the distance travelled in the first 15 s?
  1. A125 m
  2. B350 m
  3. C500 m
  4. D625 m

Question 5

Momentum
Which relationship defines momentum of a body?
  1. Amass x acceleration
  2. Bmass x velocity
  3. Cmass divided by acceleration
  4. Dmass divided by velocity

Question 6

Forces
Which quantity is constant during free fall?
  1. Adisplacement
  2. Bacceleration
  3. Cvelocity
  4. Dtime

Question 7

Forces
A moment of a force can be defined as the
  1. Aproduct of mass and distance from pivot.
  2. Bproduct of force and distance from pivot.
  3. Cproduct of mass and perpendicular distance from pivot.
  4. Dproduct of force and perpendicular distance from pivot.

Question 10

Energy
Work is defined as the product of
  1. Apower and distance.
  2. Bforce and distance.
  3. Cpower and velocity.
  4. Dforce and velocity.

Question 11

Energy
An electric motor is used to lift a 5 N load through a distance of 3 m when 27 J of energy is supplied to it. What is the amount of energy converted to heat and sound?
  1. A12 J
  2. B15 J
  3. C42 J
  4. D81 J

Question 12

Structures
Concrete is used in construction because it
  1. Ais light.
  2. Bhas a high strength to mass ratio.
  3. Cis compression resistant.
  4. Dis tension resistant.

Question 16

Thermal physics
The diagram shows movement of air currents in a room due to a heater. Which part A, B, C or D, of the room, has the highest temperature?
  1. AA
  2. BB
  3. CC
  4. DD

Question 17

Thermal physics
What will reduce the sensitivity of a liquid in glass thermometer?
  1. AReducing diameter of the capillary tube.
  2. BReducing thickness of the stem.
  3. CIncreasing diameter of capillary tube.
  4. DIncreasing the length of the stem.

Question 18

Machines
Which pair is correct for the power stroke in a petrol engine?
  1. Apiston moves upwards and the outlet valve is closed
  2. Bpiston moves upwards and the outlet valve is open
  3. Cpiston moves downwards and the outlet valve is open
  4. Dpiston moves downwards and the outlet valve is closed

Question 19

Energy
A non renewable form of energy is
  1. Atidal energy.
  2. Bwind energy.
  3. Cnuclear energy.
  4. Dgeothermal energy.

Question 20

Light
Unclear images can be seen on water surfaces because at the water surface
  1. Athere is refraction only.
  2. Bthere is reflection only.
  3. Cthere is total internal reflection.
  4. Dthere is both reflection and refraction.

Question 21

Waves
The diagram shows a graph of displacement against time for a wave. What is the wavelength if its speed is 150 m/s?
  1. A6.5 m
  2. B12.0 m
  3. C23.0 m
  4. D975.0 m

Question 22

Waves
Audible sound has a frequency of about
  1. A0 to 20 Hz.
  2. B20 Hz to 20 kHz.
  3. C20 kHz to 200 kHz.
  4. D20 MHz to 200 MHz.

Question 23

Waves
Sound travels the fastest in
  1. Aair.
  2. Bliquids.
  3. Csolids.
  4. Dvacuum.

Question 24

Waves
Which type of electromagnetic radiation has the lowest frequency?
  1. Amicrowaves
  2. Bultraviolet
  3. Cvisible light
  4. Dradio waves

Question 26

Electrostatics
When a plastic rod is charged positively by friction,
  1. Ait loses electrons.
  2. Bit gains electrons.
  3. Cit gains protons.
  4. Dit loses protons.

Question 27

Electricity
The circuit shown is used to determine electrical power dissipated in a resistor, R. The power dissipated by R is
  1. A1 W.
  2. B5 W.
  3. C6 W.
  4. D11 W.

Question 28

Electricity
An ideal voltmeter
  1. Ahas a large resistance.
  2. Bdraws a large current.
  3. Cmeasures power of a component.
  4. Dis connected in series with a component.

Question 29

Electricity
An electric stove is rated 230 V, 13 A. What is the energy used in 2 hours?
  1. A5.98 kWh
  2. B359 kWh
  3. C1 495 kWh
  4. D5 980 kWh

Question 30

Magnetism
A learner would deduce that a piece of metal is a magnet if
  1. Aa piece of copper wire is attracted to it.
  2. Ba piece of copper wire is repelled by it.
  3. Cone end of a compass needle is repelled by it.
  4. Dboth ends of a compass needle are attracted to it.

Question 31

Magnetism
Which material is suitable for the core of an electromagnet?
  1. Airon
  2. Bsteel
  3. Ccopper
  4. Daluminium

Question 32

Electricity
An ideal transformer has 400 turns on the primary coil and 100 turns on the secondary coil. What is the current on the secondary coil if 20 A flow in the primary coil?
  1. A0.2 A
  2. B5 A
  3. C20 A
  4. D80 A

Question 33

Electricity
E.m.f. induced when a conductor is moved at right angles to a magnetic field depends on the following, except
  1. Aresistance of the conductor.
  2. Bspeed of the conductor.
  3. Clength of the conductor.
  4. Dmagnetic field strength.

Question 34

Electronics
Which single logic gate is equivalent to the combination shown?
  1. AAND
  2. BNAND
  3. COR
  4. DNOR

Question 35

Electronics
Which symbol represents an OR gate?
  1. AA
  2. BB
  3. CC
  4. DD

Question 36

Electronics
Which diagram shows the symbol for a capacitor?
  1. AA
  2. BB
  3. CC
  4. DD

Question 37

Electronics
Which graph shows the output for half wave rectification?
  1. AA
  2. BB
  3. CC
  4. DD

Question 38

Radioactivity
The nuclear equation hydrogen-2 plus hydrogen-3 gives helium-4 plus a neutron represents
  1. Aalpha decay.
  2. Bbeta decay.
  3. Cnuclear fusion.
  4. Dnuclear fission.

Question 39

Radioactivity
The diagram shows a beam of alpha particles entering a magnetic field. The alpha particles will be deflected
  1. Ainto the paper.
  2. Bout of the paper.
  3. Ctowards the N-pole.
  4. Dtowards the S-pole.

Question 40

Radioactivity
Which one is not a use of radioactive isotopes?
  1. Atracers
  2. Bradiotherapy
  3. Cchemotherapy
  4. Ddetection of leakages

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