N5 Physics Past Paper PDF 2024 - X857/75/02

N5 X857/75/02 National Qualications 2024 Physics Section 1 — Questions THURSDAY, 25 A...

N5 X857/75/02 National Qualications 2024 Physics Section 1 — Questions THURSDAY, 25 APRIL 1:00 PM – 3:30 PM Instructions for the completion of Section 1 are given on page 02 of your question and answer booklet X857/75/01. Record your answers on the answer grid on page 03 of your question and answer booklet. Reference may be made to the data sheet on page 02 of this booklet and to the relationships sheet X857/75/11. Before leaving the examination room you must give your question and answer booklet to the Invigilator; if you do not, you may lose all the marks for this paper. © *X8577502* A/PB  DATA SHEET Speed of light in materials Speed of sound in materials −1 Material Speed in m s Material Speed in m s−1 Air 3.0 × 108 Aluminium 5200 Carbon dioxide 3.0 × 108 Air 340 Diamond 1.2 × 108 Bone 4100 Glass 2.0 × 108 Carbon dioxide 270 Glycerol 2.1 × 108 Glycerol 1900 Water 2.3 × 108 Muscle 1600 Steel 5200 Gravitational field strengths Tissue 1500 Water 1500 Gravitational field strength on the surface in N kg−1 Specific heat capacity of materials Earth 9.8 Specific heat capacity Material Jupiter 23 in J kg−1 °C−1 Mars 3.7 Alcohol 2350 Mercury 3.7 Aluminium 902 Moon 1.6 Copper 386 Neptune 11 Glass 500 Saturn 9.0 Ice 2100 Sun 270 Iron 480 Uranus 8.7 Lead 128 Venus 8.9 Oil 2130 Water 4180 Specific latent heat of fusion of materials Melting and boiling points of materials Specific latent heat Material Melting point Boiling point of fusion in J kg−1 Material in °C in °C Alcohol 0.99 × 105 Alcohol −98 65 Aluminium 3.95 × 105 Aluminium 660 2470 Carbon dioxide 1.80 × 105 Copper 1077 2567 Copper 2.05 × 105 Lead 328 1737 Iron 2.67 × 105 Iron 1537 2737 Lead 0.25 × 105 Water – 100 Water 3.34 × 105 Radiation weighting factors Specific latent heat of vaporisation of materials Radiation Type of radiation Specific latent heat of weighting factor Material vaporisation in J kg−1 alpha 20 Alcohol 11.2 × 105 beta 1 Carbon dioxide 3.77 × 10 5 fast neutrons 10 Glycerol 8.30 × 10 5 gamma 1 Turpentine 2.90 × 105 slow neutrons 3 Water 22.6 × 105 X-rays 1 page 02  SECTION 1 — 25 marks Attempt ALL questions 1. Which row in the table classifies speed, weight, and energy correctly? Speed Weight Energy A scalar scalar scalar B vector scalar vector C scalar vector vector D vector vector vector E scalar vector scalar 2. A student uses the apparatus shown to determine the average speed and instantaneous speed of a trolley as it travels down a slope. l card trolley t1 X ramp stopwatch light gate t2 d electronic timer Y The trolley is released at X and travels down the slope. The distance between X and the light gate at Y is d. The time taken for the trolley to reach the light gate is t1. The length of the card on the trolley is l. The time taken for the card to pass through the light gate is t2. Which row in the table shows the measurements required to determine the average speed of the trolley between X and Y, and the instantaneous speed of the trolley at Y? Measurements for average Measurements for speed between X and Y instantaneous speed at Y A l and t1 d and t2 B d and t1 l and t2 C l and t2 d and t1 D d and t2 l and t2 E d and t1 l and t1 page 03 [Turn over 3. A rocket is taking off from the surface of the Earth. The rocket engines exert a force on the exhaust gases. Which of the following is the reaction to this force? A The force of the Earth on the exhaust gases. B The force of the Earth on the rocket engines. C The force of the rocket engines on the Earth. D The force of the exhaust gases on the Earth. E The force of the exhaust gases on the rocket engines. 4. A motor raises a mass of 2400 kg vertically through a height of 5.0 m in 2 minutes. The minimum power rating of the motor to raise the mass is A 100 W B 980 W C 24 000 W D 59 000 W E 120 000 W. 5. A satellite is in circular orbit around a planet. satellite planet A group of students make the following statements about the satellite in orbit: I The horizontal speed of the satellite is constant. II The satellite does not move. III While orbiting the planet the satellite is weightless. Which of these statements is/are correct? A I only B II only C III only D I and III only E II and III only page 04 6. A pulse of light from a laser is transmitted from the Earth to the Moon. The light reflects from a mirror on the Moon and is detected back on Earth 2.6 s after being transmitted. The distance from the Earth to the Moon is A 8.8 × 102 m B 1.2 × 108 m C 2.3 × 108 m D 3.9 × 108 m E 7.8 × 108 m. 7. The table shows the altitude and period of four satellites. Satellite Altitude (km) Period (minutes) International Space Station    408   93 AprizeSat-3    686 Intelsat-18 35 800 1440 Hubble Space Telescope    537   95 The period of the AprizeSat-3 satellite is A 85 minutes B 94 minutes C 98 minutes D 1440 minutes E 1600 minutes. 8. A student makes the following statements about the Universe: I One light-year is the time taken for light to travel from the Sun to the Earth. II The approximate age of the Universe is 13.8 billion years. III The ‘Big Bang’ theory describes the origin of the Universe. Which of these statements is/are correct? A II only B III only C I and III only D II and III only E I, II and III page 05 [Turn over  9. An electric field exists around two point charges Q and R. The diagram shows the path taken by a charged particle as it travels through the field. The motion of the particle is as shown. path taken by particle R Q Which row in the table identifies the charge on the particle, the charge on Q, and the charge on R? Charge on particle Charge on Q Charge on R A positive negative negative B negative negative positive C negative positive negative D positive negative positive E positive positive positive 10. A toaster is connected to a 230 V mains supply and switched on. The heating element in the toaster has a power rating of 1.2 kW. A student makes the following statements about the toaster: I The heating element transfers 12 000 J of electrical energy each second. II The plug of the toaster should be fitted with a fuse rated at 13 A. III The charge passing through the heating element each second is 230 C. Which of these statements is/are correct? A I only B II only C I and II only D II and III only E I, II and III page 06 11. A circuit is set up as shown. 16 Ω V1 24 Ω V2 The reading on voltmeter V1 is 3.6 V. The reading on voltmeter V2 is A 0.4 V B 2.2 V C 2.4 V D 3.6 V E 5.4 V. [Turn over page 07 12. A circuit is set up as shown. A2 A1 A3 The resistance of the LDR increases as the light level decreases. The light level incident on the LDR decreases. Which row in the table describes the effect of this change on the readings on the ammeters? Reading on Reading on Reading on ammeter A1 ammeter A2 ammeter A3 A decreases decreases decreases B decreases stays the same stays the same C stays the same stays the same stays the same D increases stays the same stays the same E increases increases increases 13. Three resistors are connected as shown. 12 Ω X 6.0 Ω Y 4.0 Ω The total resistance between X and Y is A 0.5 Ω B 2.0 Ω C 4.0 Ω D 6.0 Ω E 22 Ω. page 08 14. A length of wire has a resistance of 8.0 Ω. The current in the wire is 1.5 A. The power developed in the wire is A 5.3 W B 12 W C 18 W D 43 W E 96 W. 15. A student carries out an experiment to determine the specific heat capacity of copper. The setup used by the student is shown. thermometer immersion heater 12 V power supply stopclock 1 kg copper block heatproof mat The student heats the copper block for 5 minutes. The temperature of the block increases by 14 °C. The value of the specific heat capacity of copper determined by the student using this method is found to be inaccurate. Which of the following changes would improve the accuracy of this experiment? A Heating the copper block for a longer time. B Placing insulation around the copper block. C Replacing the copper block with one of less mass. D Replacing the immersion heater with one of a higher power rating. E Removing the heatproof mat. [Turn over page 09 16. A solid substance is placed in an insulated container and heated. The graph shows how the temperature T of the substance varies with time t. T U S T Q R P 0 t To determine the specific latent heat of vaporisation of the substance, a student would use the time from section A PQ B QR C RS D ST E TU. 17. A syringe containing air is sealed at one end as shown. syringe plunger air seal The initial volume of the air in the syringe is 1.40 × 10−6 m3 and the pressure is 120 kPa. The plunger is pushed in causing the volume to be reduced by 0.30 × 10−6 m3. The temperature of the air inside the syringe remains constant. The pressure of the air inside the syringe is now A 26 kPa B 94 kPa C 99 kPa D 153 kPa E 560 kPa. page 10 18. The size of the buoyancy force Fb acting on an object immersed in a fluid is given by the relationship Fb = ρgV where: ρ is the density of the fluid in kg m−3 g is the gravitational field strength in N kg−1 V is the volume of the object in m3. The volume of an object that experiences a buoyancy force of 360 N when immersed in a fluid of density 1020 kg m−3 is A 0.036 m3 B 0.33 m3 C 3.5 m3 D 28 m3 E 37 000 m3. 19. The diagram represents a wave travelling from X to Y. X Y 24 m The speed of the wave is 48 m s−1. The frequency of the wave is A 0.50 Hz B 2.0 Hz C 6.0 Hz D 144 Hz E 384 Hz. [Turn over page 11 20. The letters X, Y, and Z represent missing words or phrases from the following passage. Infrared has a.... X.... wavelength than visible light. Infrared diffracts....Y.... than visible light. The speed of infrared is.... Z.... visible light. Which row in the table shows the missing words or phrases? X Y Z A longer less the same as B shorter less slower than C longer more the same as D shorter more faster than E longer more faster than 21. The diagram shows the path of a ray of red light as it passes through and out of a semicircular glass block. air 58° 70° glass ray of light Which row in the table shows the angle of incidence in the glass and the angle of refraction in air? Angle of incidence in glass Angle of refraction in air A 20° 32° B 32° 20° C 58° 70° D 70° 32° E 70° 58° page 12 22. Which of the following statements describes the term ionisation? A The removal of a proton from an atom to form a charged particle. B The removal of an electron from an atom to form a charged particle. C The removal of a neutron from an atom. D The splitting of a large nucleus into smaller nuclei. E The joining of small nuclei to form a larger nucleus. 23. In a radioactive source 1.8 × 106 nuclei decay in 10 hours. The activity of the source is A 1.8 × 105 Bq B 3.0 × 104 Bq C 3.0 × 103 Bq D 500 Bq E 50 Bq. 24. A sample of tissue receives an absorbed dose of 0.20 µGy from a source of alpha radiation and an absorbed dose of 6.0 µGy from a source of slow neutrons. The total equivalent dose received by the sample of tissue is A 6.2 µSv B 19 µSv C 22 µSv D 64 µSv E 140 µSv. [Turn over page 13 25. A technician carries out an experiment, using the apparatus shown, to determine the half‑life of a radioactive source. clock ratemeter Geiger-Müller radioactive stop clock tube source Before carrying out the experiment the technician measures the background count rate. The technician takes readings of the count rate displayed on the ratemeter every 60 s for a period of 20 minutes. A graph of the technician’s measurements is as shown. 500 corrected count rate (counts per second) 400 300 200 100 0 0 5 10 15 20 time (minutes) Which of the following changes would allow the technician to more easily determine the half-life of the radioactive source? A Take readings of the count rate every 30 seconds for 20 minutes. B Take readings of the count rate every 60 seconds for 40 minutes. C Place lead shielding around the radioactive source. D Move the radioactive source closer to the Geiger-Müller tube. E Move the radioactive source further away from the Geiger-Müller tube. [END OF SECTION 1. NOW ATTEMPT THE QUESTIONS IN SECTION 2 OF YOUR QUESTION AND ANSWER BOOKLET] page 14  [BLANK PAGE] DO NOT WRITE ON THIS PAGE page 15  [BLANK PAGE] DO NOT WRITE ON THIS PAGE page 16