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ZIMSEC O Level · 4023/1 · N2022

Physics Paper 1 November 2022

Questions
39 of 40
Time allowed
60 min
Syllabus code
4023/1

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Questions
39
Pass mark
24
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Answer every question in the printed order, get marked at the end, then see the answers.

The questions

Question 1

Pressure
Which one is a unit of pressure?
  1. ANm
  2. BN/m
  3. CN/m2
  4. DN/m3

Question 2

Measurement
Which instrument is used to measure the diameter of a thin wire accurately?
  1. Ametre rule
  2. Bvernier calipers
  3. Cmicrometer screw gauge
  4. Dtap measure

Question 3

Measurement
Which one is a scalar quantity?
  1. Avelocity
  2. Bacceleration
  3. Cspeed
  4. Dforce

Question 4

Structures
Which is an effect of a tensional force?
  1. Abending
  2. Bbuckling
  3. Cshearing
  4. Dsnapping

Question 5

Kinematics
Which one is correct for a body in motion?
  1. AIts speed is the rate of change of distance.
  2. BThe gradient of its displacement-time graph at any point gives the average velocity.
  3. CIt must have an acceleration greater than zero.
  4. DWhen velocity increases with time, its acceleration also increases with time.

Question 6

Forces
Which row shows the correct difference between mass and weight?
  1. Amass is measured in newtons, weight is measured in kilograms
  2. Bmass is constant, weight varies with location
  3. Cmass is measured using a forcemeter, weight is measured using a balance
  4. Dmass is a vector quantity, weight is a scalar quantity

Question 7

Forces
What name is given to the turning effect of a force?
  1. Apivot
  2. Bpressure
  3. Cmoment
  4. Dresultant

Question 8

Forces
A larger centripetal force is produced when the
  1. Amass of a car is reduced.
  2. Bspeed of a car is reduced.
  3. Cradius of the circle is reduced.
  4. Dmomentum of the car is reduced.

Question 9

Energy
Which quantity is conserved when a stone is dropped from a height, L to the ground?
  1. Aenergy
  2. Bforce
  3. Cvelocity
  4. Dacceleration

Question 10

Forces
The diagram shows an extension load graph of a wire. Which point A, B, C or D shows the limit of proportionality for an elastic wire?
  1. AA
  2. BB
  3. CC
  4. DD

Question 11

Machines
The efficiency of a machine is improved by
  1. Aincreasing the mass of the moving parts.
  2. Bdecreasing the mass of the moving parts.
  3. Cincreasing the roughness of the moving parts.
  4. Dincreasing the height of the moving parts.

Question 12

Structures
Metal cannot be joined to plastic by
  1. Anailing.
  2. Bscrewing.
  3. Cbolting.
  4. Dbrazing.

Question 13

Energy
A mass of 8 kg is moving at constant speed. The kinetic energy of the mass is 400 J. What is the speed of the mass?
  1. A0.02 m/s
  2. B10.00 m/s
  3. C50.00 m/s
  4. D100.00 m/s

Question 14

Energy
Potential energy is the energy that a body has due to its
  1. Amotion.
  2. Bposition or physical condition.
  3. Cheight above sea level.
  4. Dtemperature difference.

Question 15

Energy
Which expression gives the power?
  1. Aenergy x time
  2. Bforce x velocity
  3. Cforce divided by velocity
  4. Dtime divided by energy

Question 16

Thermal physics
A cylinder contains 0.42 m3 of nitrogen at a pressure of 260 kPa. What is the new volume of nitrogen at 110 kPa at constant temperature?
  1. A0.18 m3
  2. B0.24 m3
  3. C0.42 m3
  4. D0.99 m3

Question 17

Thermal physics
Water is used as a coolant in car engines because it has a
  1. Ahigh specific heat capacity.
  2. Bhigh specific latent heat.
  3. Clow specific heat capacity.
  4. Dlow specific latent heat.

Question 18

Waves
What is the frequency for a red light of wavelength 7 x 10-7 m?
  1. A1.4 x 106 Hz
  2. B4.3 x 1014 Hz
  3. C2.3 x 10-15 Hz
  4. D2.1 x 102 Hz

Question 19

Waves
For reflection and refraction, a wave changes
  1. Adirection.
  2. Bspeed.
  3. Cfrequency.
  4. Dwavelength.

Question 20

Light
When a magnifying glass is moved away from an object, the image
  1. Abecomes inverted.
  2. Bbecomes diminished.
  3. Cmoves closer to the lens.
  4. Dmoves further from the lens.

Question 21

Waves
A boy fires a pistol in front of a tall building. He hears two shots 6 seconds apart. What is the distance of the boy from the building, if the speed of sound in air is 300 m/s?
  1. A50 m
  2. B100 m
  3. C900 m
  4. D1 800 m

Question 22

Waves
The table shows part of the electromagnetic spectrum in order: P, ultraviolet, Q, infrared. Which combination identifies P and Q?
  1. AP is X-ray and Q is visible light
  2. BP is radio waves and Q is visible light
  3. CP is X-ray and Q is gamma rays
  4. DP is gamma rays and Q is radio waves

Question 23

Electrostatics
In an electric field of an isolated negative charge, the
  1. Anumber of field lines depend on the size of the charge.
  2. Bfield lines cross each other.
  3. Cfield lines point away from the charge.
  4. Delectric force is in the opposite direction to field lines.

Question 24

Electrostatics
An uncharged gold leaf electroscope can be used for the following except to show
  1. Athat an object is charged.
  2. Bthat charge can be induced.
  3. Cthat like charges repel.
  4. Dthe nature of the charge.

Question 25

Electricity
The diagram shows identical lamps X and Y connected to battery. Which statement is not true about the lamps?
  1. AThey shine with equal brightness when lit.
  2. BThey can be operated from different switches.
  3. CThey can be operated independently from the same switch.
  4. DThey consume the same amount of electrical energy.

Question 26

Electricity
The earth wire on an electric heater should be connected to the
  1. Aheating element.
  2. Bmetal case.
  3. Con/off switch.
  4. Dplastic handle.

Question 28

Electricity
Resistance of a conductor is independent of
  1. Adensity.
  2. Btemperature.
  3. Clength.
  4. Dthickness.

Question 29

Magnetism
A metal bar is a permanent magnet if it
  1. Aattracts another magnet.
  2. Battracts both ends of a compass needle.
  3. Crepels a copper rod.
  4. Drepels another magnet.

Question 30

Electricity
Direct current cannot be stepped down using transformers because it
  1. Acannot be transmitted over longer distances.
  2. Bcannot be generated in form of high voltage.
  3. Cdoes not electrocute even at high voltage.
  4. Ddoes not produce a changing magnetic field.

Question 31

Electricity
What changes the direction of induced e.m.f. in an a.c. generator every half-cycle?
  1. Abrushes
  2. Bslip rings
  3. Ccommutators
  4. Ddirection of coil

Question 32

Electronics
The diagram shows a logic gate symbol. What is the logic gate shown?
  1. AOR
  2. BAND
  3. CNOR
  4. DNAND

Question 33

Electronics
Which diagram shows a half-wave rectifier circuit?
  1. AA
  2. BB
  3. CC
  4. DD

Question 34

Magnetism
The right hand grip rule is used to determine the direction of the
  1. Ainduced current in a conductor.
  2. Bmagnetic field due to current in a straight conductor.
  3. Cforce on a current-carrying conductor in a magnetic field.
  4. Ddeflection on a charged particle in a magnetic field.

Question 35

Electronics
What is the reason for making the interior region of a cathode ray oscilloscope a vacuum?
  1. ATo increase collimation of electrons.
  2. BTo increase deflection of electrons.
  3. CTo maintain acceleration of electrons.
  4. DTo increase emission of electrons.

Question 36

Thermal physics
The diagram shows a type of a thermometer. What type of a thermometer is shown in the diagram?
  1. Aresistance thermometer
  2. Bthermocouple thermometer
  3. Cclinical thermometer
  4. Dliquid in glass thermometer

Question 37

Radioactivity
Isotopes of carbon elements have different
  1. Anumber of protons.
  2. Bnumber of electrons.
  3. Catomic number.
  4. Datomic masses.

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
Which one is not a use of radio active substances?
  1. Atracers
  2. Bsterilisation
  3. Cpower generation
  4. Dradio communication

Question 40

Radioactivity
Iodine-128 has a half-life of 25 minutes. If the initial mass is 600 g, the mass that decays in 75 minutes is
  1. A75 g.
  2. B200 g.
  3. C400 g.
  4. D525 g.

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