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ZIMSEC A Level · 6032/1 · J2023

Physics Paper 1 June 2023

Questions
40
Time allowed
60 min
Syllabus code
6032/1

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Questions
40
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

electric fields
Which one is the correct unit for electric field strength?
  1. Akgms⁻²C
  2. Bkgm²s⁻²C⁻¹
  3. Ckgm²s⁻²C
  4. Dkgms⁻²C⁻¹

Question 2

kinematics
A ball is released from rest and falls in the absence of air resistance. Which graph shows the variation of displacement with time?
  1. AA
  2. BB
  3. CC
  4. DD

Question 3

fluids
The magnitude of the upthrust acting on a body falling in a fluid depends on the
  1. Asurface area of the object.
  2. Bspeed of the object.
  3. Cvolume of the displaced fluid.
  4. Ddensity of the object.

Question 4

gravitation
A geostationary satellite has a circular orbit of radius R around the Earth. The satellite falls into a new orbit of radius R/4. What is the period of the satellite in the new orbit?
  1. A3 hrs
  2. B6 hrs
  3. C24 hrs
  4. D192 hrs

Question 5

simple harmonic motion
The angular frequency of a body in simple harmonic motion making n complete oscillations in one second is
  1. A1/n rads⁻¹
  2. B2π/n rads⁻¹
  3. Cn rads⁻¹
  4. D2πn rads⁻¹

Question 6

simple harmonic motion
Which graph represents the variation of kinetic energy with displacement for a body executing simple harmonic motion?
  1. AA
  2. BB
  3. CC
  4. DD

Question 7

communications
In optical fibre transmission of information, infrared radiation is preferred to visible light because infrared radiation
  1. Atransfers more heat energy than visible light.
  2. Bis less attenuated in glass than visible light.
  3. Ctravels faster than visible light.
  4. Dhas a higher frequency than visible light.

Question 8

waves
Sound waves travel in air at constant temperature. Which statement is correct about the sound waves?
  1. Awavelength is directly proportional to amplitude
  2. Bvelocity is inversely proportional to wavelength
  3. Cfrequency is inversely proportional to wavelength
  4. Damplitude is inversely proportional to velocity

Question 9

medical physics
A radiographer wants to produce an image of high quality while investigating human muscle tissue using X-rays. This can be achieved by
  1. Ausing soft X-rays.
  2. Busing hard X-rays.
  3. Cusing contrast media.
  4. Dincreasing the time of exposure.

Question 10

waves
The diagram shows stationary waves in a pipe which is open at one end. What is the frequency of the sound wave with a speed of 330 ms⁻¹?
  1. A5.50 Hz
  2. B550 Hz
  3. C1 000 Hz
  4. D1 650 Hz

Question 11

alternating current
The diagram shows a resistor R connected to an a.c supply of period T, with an ammeter and voltmeters in the circuit. Which graph shows the variation of power with time across the resistor?
  1. AA
  2. BB
  3. CC
  4. DD

Question 12

resistors and power
The diagram shows a circuit in which a light dependent resistor (LDR) is connected to a 400 Ω resistor and a 6.0 V power supply. The LDR has a resistance of 200 Ω in bright light and 1 MΩ in darkness. What would be the values of VR in darkness and in bright light?
  1. Adarkness 0.0 V, brightness 4.0 V
  2. Bdarkness 6.0 V, brightness 0.0 V
  3. Cdarkness 4.0 V, brightness 0.0 V
  4. Ddarkness 0.0 V, brightness 6.0 V

Question 13

resistors and power
The diagram shows a battery of negligible internal resistance connected to resistors R1, R2 and a thermistor. When the switch is closed, the ammeter reading is 3.0 A with the thermistor at 20 °C. How would the ammeter reading change when the temperature changes to 40 °C?
  1. Adoubles as temperature has doubled
  2. Bincreases as thermistor resistance decreases with temperature
  3. Cdecreases as thermistor resistance increases with temperature
  4. Dreduces to half as thermistor resistance is doubled

Question 14

electrostatics
If the force between two charged bodies is F, then doubling their distance apart changes the force to
  1. A¼F.
  2. B½F.
  3. C2F.
  4. D4F.

Question 15

electric fields
The diagram shows two parallel conducting plates P and Q. Plate P is at a positive electric potential with respect to Q. MN is a line perpendicular to the plates. Which graph shows the variation of the electric field with distance along the line MN?
  1. AA
  2. BB
  3. CC
  4. DD

Question 16

capacitors
The diagram shows a capacitor of capacitance 3μF with the switch connected to terminal P, charged by a 6 V supply. The switch is now connected to Q, thus charging the 6μF capacitor from the 3μF. What is the new potential difference across the combination?
  1. A2.0 V
  2. B3.0 V
  3. C4.0 V
  4. D6.0 V

Question 17

magnetic fields
The diagram shows a conductor carrying a current of 13.0 A lying across a magnetic field of field strength B = 0.2 T at an angle of 150°, with a 2.0 cm and 3.5 cm construction shown. What is the magnitude of the magnetic force acting on the current carrying conductor?
  1. A5.2 T
  2. B9.1 T
  3. C10.4 T
  4. D18.2 T

Question 18

electromagnetism
The diagrams show two current carrying coils facing each other, coil X on the left (labelled at its right end) and coil Y on the right (labelled at its left end), each wound and connected to a battery the same way. Which statement is correct?
  1. AThe coils attract since face X is a north pole and face Y is a south pole.
  2. BThe coils attract since face X is a south pole and face Y a north pole.
  3. CThe coils repel since face X is a south pole and face Y is a south pole.
  4. DThe coils repel since face X is a north pole and face Y is a north pole.

Question 19

operational amplifiers
The diagram shows an operational amplifier (Op-Amp) circuit with Vin at the inverting input, the non-inverting input grounded, and supply rails +9.0 V / -9.0 V. Which graph shows the behaviour of the output voltage for an alternating current input voltage of Vmax = 2.0 V?
  1. AA
  2. BB
  3. CC
  4. DD

Question 20

logic gates
The diagram shows a combination of NAND gates performing the function of a certain logic gate: inputs A and B each feed both pins of their own first-stage NAND gate, and the two outputs feed a third NAND gate producing Q. Which logic gate is represented?
  1. ANAND
  2. BOR
  3. CEX-OR
  4. DAND

Question 21

operational amplifiers
The gain of a voltage follower is
  1. A0.
  2. B1.
  3. C10⁵.
  4. D∞.

Question 22

materials
Which one does not affect the Young modulus of a material?
  1. Atemperature
  2. Bpresence of dislocations
  3. Cpresence of impurities
  4. Dforce applied

Question 23

thermal physics
Which one is not an advantage of a thermocouple thermometer?
  1. Avery accurate when a milli-voltmeter is used
  2. Bcannot be read remotely
  3. Chas a very wide range
  4. Dit is very sensitive

Question 24

thermal physics
Which statement is true about the internal energy of an ideal gas?
  1. Ait depends on temperature and volume but not on pressure
  2. Bit depends on temperature but not on volume and pressure
  3. Cit depends on pressure and volume but not on temperature
  4. Dit depends on pressure and temperature but not on volume

Question 25

thermal physics
The diagram shows a variation of temperature T with time t as heat is extracted from a substance, in four labelled sections A, B, C, D (A: flat, B: sloped, C: flat at a lower temperature, D: sloped to the axis). In which section is heat extracted called latent heat of fusion?
  1. AA
  2. BB
  3. CC
  4. DD

Question 26

thermal physics
A sample of an ideal gas absorbs 150 J through heating and does 190 J of external work against the environment. Which phrase describes the change in the internal energy of the gas?
  1. Aan increase of 40 J
  2. Ban increase of 340 J
  3. Ca decrease of 40 J
  4. Da decrease of 340 J

Question 27

kinetic theory
A sample of an ideal gas contains 3.18 x 10^24 molecules whose molar mass is 4.0 g. The mean square speed of the gas is 300 m²/s². What is the total kinetic energy of the molecules?
  1. A0.60 J
  2. B3.2 J
  3. C1100 J
  4. D180 J

Question 28

fluids
The diagram shows a horizontal pipe with a constriction, with turbulence marks shown at and after the narrow section. The shape of the constriction is to
  1. Amake the flow more lamina.
  2. Breduce pressure and turbulence.
  3. Cincrease the velocity gradient across the layers.
  4. Densure that the fluid remains non viscous.

Question 29

thermal physics
Which statement is not true about the mechanism of thermal conduction?
  1. AConductors contain a large number of free electrons which carry heat and transfer it during collisions.
  2. BHeated atoms vibrate more and collide with free electrons transferring heat energy to them.
  3. CIndividual electrons can move very long distances along a conductor.
  4. DThermal conduction cannot occur at absolute zero.

Question 30

electromagnetism
The diagram shows a velocity selector. Only the ions having a selected velocity are able to emerge from slit S2. Positive ions travel right through crossed electric (upper plate positive) and magnetic (into the page) fields. What happens to ions which are unable to emerge from slit S2?
  1. AThe faster ions are deflected towards the upper plate due to the action of the magnetic field.
  2. BThe faster ions are deflected towards the upper plate due to the action of the electric field.
  3. CThe faster ions are deflected towards the lower plate due to the action of the magnetic field.
  4. DThe faster ions are deflected towards the lower plate due to the action of the electric field.

Question 31

magnetic fields
An electron of mass me and charge q moves in a circular path in a magnetic field of flux density B. What is the correct expression for its period?
  1. A2πme/(Bq)
  2. BBq/(2πme)
  3. C2πme/(Bqr)
  4. DBqr/(2πme)

Question 32

photoelectric effect
A photocell is illuminated with X-rays resulting in emission of photo electrons. The intensity of the illumination is reduced and this causes
  1. Aa reduction in both the rate at which electrons are emitted and their maximum kinetic energy.
  2. Ba reduction in the rate at which electrons are emitted but no change in their maximum kinetic energy.
  3. Cno change in the maximum kinetic energy of electrons and the rate at which electrons are emitted.
  4. Da reduction in the maximum kinetic energy of the electrons but no change in their rate of emission.

Question 33

photoelectric effect
The graph shows the variation of stopping potential with frequency obtained from an experiment to investigate the maximum kinetic energy of photoelectrons emitted from a metal surface. The gradient of the graph is equal to the
  1. Awork function of the surface divided by the electron charge.
  2. Bwork function of the surface.
  3. Cplanck's constant divided by the electron charge.
  4. Dplanck's constant.

Question 34

radioactivity
A radioactive nuclide emits two β particles and an α - particle. The resulting nuclide will be an isotope with
  1. Aa higher proton number.
  2. Ba lower proton number.
  3. Cthe same nucleon number.
  4. Dthe same proton number .

Question 35

radioactivity
Which row describes the nature of β radiation, γ-radiation and α - radiation?
  1. Aβ: Helium nuclei, γ: uncharged particles, α: electron
  2. Bβ: electron, γ: packets of wave energy, α: Helium nuclei
  3. Cβ: Helium nuclei, γ: packets of wave energy, α: electron
  4. Dβ: electron, γ: uncharged particles, α: Helium nuclei

Question 36

atomic physics
Which diagram correctly represents the paths of α particles scattered by a gold nucleus?
  1. AA
  2. BB
  3. CC
  4. DD

Question 37

radioactivity
Two samples consist of radioactive nuclide A and B. After an interval of time, it is found that 5/8 of the atoms of A and ¼ of atoms of B decayed. The ratio of (half life of B)/(half life of A) is
  1. A3.41.
  2. B0.29.
  3. C3.38.
  4. D2.96

Question 38

communications
The diagram shows the voltage variation with time of an amplitude modulated carrier wave, with a bracket marking 2μs under part of the waveform. The frequency of the carrier wave is
  1. A1 x 10⁶ Hz.
  2. B2.0 x 10⁶ Hz.
  3. C0.5 x 10⁶ Hz.
  4. D2.0 x 10⁻⁶ Hz.

Question 39

communications
Which one is true for both wire-pairs and coaxial cables, given a table of properties for each?
  1. Awire-pairs suffer from cross talk; coaxial cables have little cross-talk
  2. Bwire-pairs are more secure; coaxial cables have low secure
  3. Cwire-pairs have less electrical interference and noise; coaxial cables pick up noise and interference
  4. Dwire-pairs are less attenuating; coaxial cables have signal attenuated greatly

Question 40

communications
A signal of power 14.0 mW passes along one cable, where the attenuation is 20 dB. It then passes along another cable, where the attenuation is 40 dB. What is the power at the end of the two cables?
  1. A1.4 x 10⁴ W
  2. B1.4 x 10⁻⁴ W
  3. C1.4 x 10⁻⁶ W
  4. D1.4 x 10⁻⁸ W

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