# Physical Sciences Grade 12 P1 NSC June 2024 QP (Eng) > Grade 12 Physical Sciences Paper 1 question paper from the NSC June Exam 2024 (English), 32 pages. Read online or download the free PDF. - Page: https://www.hlayiso.com/library/gr-12-physical-sciences-p1-english-june-2024-question-paper/ae2a3d8e-9379-4e66-bccb-637f5d9fd682 - Updated: 2026-09-27 - Subject: Physical Sciences - Grade: Grade 12 - Language: English - Document type: Question paper - Year: 2024 - Exam period: NSC June Exam - Paper: 1 - Curriculum: CAPS - Pages: 32 Breadcrumbs: [Home](https://www.hlayiso.com/) › [Library](https://www.hlayiso.com/library) › [Grade 12](https://www.hlayiso.com/library/grade-12) › [Physical Sciences](https://www.hlayiso.com/library/grade-12/physical-sciences) › [Physical Sciences Grade 12 P1 NSC June 2024 QP (Eng)](https://www.hlayiso.com/library/gr-12-physical-sciences-p1-english-june-2024-question-paper/ae2a3d8e-9379-4e66-bccb-637f5d9fd682) ## About this document Physical Sciences · Grade 12 · NSC June Exam · 2024 · English. Question paper, 32 pages. Read online or download the PDF. Read it free online on the page above; download the PDF from there. ## Document text Text extracted from the PDF. Layout, diagrams and tables may not survive extraction. ### Page 1 Downloaded from hlayiso.com Confidential \ Gouge ‘este basic education ( WE. fea Department: KG) / Basic Education Se REPUBLIC OF SOUTH AFRICA SENIOR CERTIFICATE EXAMINATIONS/ NATIONAL SENIOR CERTIFICATE EXAMINATIONS | PHYSICAL SCIENCES: PHYSICS (P1) | | MAY/JUNE 2024 | PHYSICAL SCIENCES: Paper 1 MARKS: 150 MAAC A TIME: 3 hour 10841E This question paper consists of 16 pages and 3 data sheets. X@5 TINE (O} ial Copyright reserved fH Please turn over ### Page 2 Downloaded from hlayiso.com Physical Sciences/P1 2 DBE/May/June 2024 SC/NSC Confidential INSTRUCTIONS AND INFORMATION 1. Write your centre number and examination number in the appropriate spaces on the ANSWER BOOK. 2. This question paper consists of TEN questions. Answer ALL the questions in the ANSWER BOOK. 3. Start EACH question on a NEW page in the ANSWER BOOK. 4. Number the answers correctly according to the numbering system used in this question paper. 5. Leave ONE line between two subquestions, e.g. between QUESTION 2.1 and QUESTION 2.2. 6. You may use a non-programmable calculator. 7. You may use appropriate mathematical instruments. 8. Show ALL formulae and substitutions in ALL calculations. 9. Round off your final numerical answers to a minimum of TWO decimal places. 10. Give brief motivations, discussions, etc. where required. 41. You are advised to use the attached DATA SHEETS. 12. Write neatly and legibly. Copyright reserved eel Please turr over ### Page 3 Downloaded from hlayiso.com Physical Sciences/P1 3 DBE/May/June 2024 SC/NSC Confidential QUESTION 1: MULTIPLE-CHOICE QUESTIONS Various options are provided as possible answers to the following questions. Each question has only ONE correct answer. Choose the answer and write only the letter {A-D) next to the question numbers (1.1 to 1.10) in the ANSWER BOOK, e.g. 1.11. 114 A book rests on a table. Which ONE of the following forces will form an action-reaction pair with the weight of the book? A Force of the Earth on the book B Force of the book on the Earth C Force of the book on the table D Force of the table on the book (2) 1.2 A person is standing on a bathroom scale in a moving lift. Which ONE of the following motions of the lift will result in the SMALLEST reading on the scale? A __ The lift accelerates upwards. B The lift accelerates downwards. C The lift moves upwards at a constant velocity. D__ The lift moves downwards at a constant veiocity. (2) 1.3 The velocity versus time sketch graph below represents the motion of a ball which was in free fall. The ball struck the ground after 3t seconds. Velocity (m-s”) ° > Time (s) Ss Which ONE of the following statements is CORRECT? The bali was ... i A ___ dropped from a height above the ground. B thrown vertically upwards from the ground. C thrown vertically upwards from a height above the ground. D __ thrown vertically downwards from a height above the ground. (2) Copyright reserved O] Wo Please turn over t iO} ### Page 4 Downloaded from hlayiso.com Physical Sciences/P1 4 DBE/May/June 2024 SC/NSC Confidential 14 The vector diagram below shows the initial momentum (p1), the final 1.5 momentum (pz) and the change in momentum (Ap) for a car that moved on a straight horizontal road. > > P Pz Ap Which ONE of the following sketch graphs CORRECTLY shows the momentum of the car for the time the car moved on the road? A Ea B E 2 5 t -—— =e | € ; ® ‘ o 5 | te =° Time 3° Time —> Momentum Momentum | __Time Time (2) A stone of mass m is dropped from a height h above the ground. Ignore the effects of air friction. Which ONE of the following combinations in the table below CORRECTLY represents the kinetic energy and the total mechanical energy of the stone at the instant the stone has fallen through a distance of % h? KINETIC ENERGY TOTAL MECHANICAL ENERGY A % mgh % mgh B Ys mgh % mgh Cc % mgh mgh D Ys mgh mgh (2). Copyright reserved Bigs) Please turn over om ### Page 5 Downloaded from hlayiso.com Physical Sciences/P1 5 DBE/May/June 2024 SC/NSC Confidential 1.6 The spectrum of helium emitted from a star moving away from Earth is compared to the spectrum of helium found on Earth. Which ONE of the following statements is CORRECT? The observed spectral lines from the moving star will have a ... A lower frequency and a longer wavelength. B lower frequency and a shorter wavelength. C higher frequency and a shorter wavelength. D higher frequency and a longer wavelength. (2) 17 The magnitudes of electric fields generated by different point charges are measured at a fixed point. For each measurement, the distance between this fixed point and the charges are the same. Which ONE of the following sketch graphs CORRECTLY shows the relationship between the magnitude of the electric field (E) and the magnitude A of the charge (Q)? E f B E* —_________» 0 3 ° Q E4 DEF | {__ Ny Copyright reserved Re Please turn over fl 5} i ### Page 6 Downloaded from hlayiso.com Physical Sciences/P1 6 DBE/May/June 2024 SC/NSC Confidential 1.8 The diagram below represents a circuit in which all the external resistors have the same resistance. (a) YY R Ag R Which ONE of the ammeters in the circuit will have the LOWEST reading? A A B Az Cc As D As (2) 1.9 A simplified diagram of an electrical machine is shown below. jit What type of machine is this? A ADC motor B An AC motor Cc A DC generator D An AC generator (2) Copyright reserved = Please turn over f ### Page 7 Downloaded from hlayiso.com Physical Sciences/P1 7 DBE/Mawy/June 2024 SC/NSC Confidential 1.10 Which ONE of the following combinations is CORRECT for a line absorption Spectrum in terms of the ENERGY TRANSITIONS OF THE ATOMS and the APPEARANCE OF THE NARROW LINES IN THE SPECTRUM? ENERGY TRANSITION APPEARANCE OF THE NARROW OF THE ATOMS LINES IN THE SPECTRUM A Higher to lower energy state Dark lines 8B Lower to higher energy state Coloured lines Cc Lower to higher energy state Dark lines D _Higher to lower energy state Coloured lines Copyright reserved Please turn over OF Ag] (2) [20] ### Page 8 Downloaded from hlayiso.com Physical Sciences/P1 8 DBE/May/June 2024 SC/NSC Confidential QUESTION 2 (Start on a new page.) Block A of mass 4,1 kg is connected to block B of mass 2,3 kg by a light inextensible string passing over a frictionless pulley. Block A is at rest on a rough horizontal table and block B hangs vertically, as shown in the diagram below. A force F of magnitude 49 N is applied on block A at an angle of 50° to the horizontal, causing block A to accelerate TO THE LEFT from rest along the table. The coefficient of kinetic friction between the surface of the table and block A is 0,35. F=49N 2.1 State Newton's Second Law of Motion in words. 2.2 Draw a labelled free-body diagram showing all the forces acting on block A while it accelerates to the left. 2.3 Calculate the magnitude of the: 2.3.1 Kinetic frictional force exerted on block A 2.3.2 Acceleration of block A, by applying Newton's Second Law to each block separately (2) (5) (3) (5) [15] Copyright reserved po Please turm oven ### Page 9 Downloaded from hlayiso.com Physical Sciences/P1 9 DBE/May-/June 2024 SC/NSC Confidential QUESTION 3 (Start on a new page.) A hot-air balloon moves vertically downwards at a constant velocity of 3,4 ms. When the balloon is 15 m above the ground, a small ball is dropped from the balloon. Refer to the diagram below. v=3,4ms" | + h=15m TEUUn ETE Ere? —L_______ ground The bail strikes the ground and bounces vertically upwards. The hot-air balloon continues to move downwards at the same constant velocity. Ignore the effects of air friction acting on the ball. 3.1 Define the term free fall. (2) The sketch graph below (not drawn to scale) represents the positions of the ball relative to the ground from the time the bali is dropped until the time it reaches its maximum height after the first bounce. E 8 0 tit ts 3 Time (s) 8 a ' 3.2 Was the ball in free fall between t; and tz seconds? Write down either YES or NO. (1) 3.3 Use only EQUATIONS OF MOTION to calculate: 3.3.1 The vaiue of t; indicated on the graph (3) 3.3.2 The height of the hot-air balloon above the ground at the instant when the ball struck the ground (4) a 3.4 The ball was in contact with the ground for 0,2 s and left the ground with a vertical upward velocity of 7,2 m-s"' ' Use only EQUATIONS OF MOTION to calculate the value of ts; indicated on the graph. (4) [14] Copyright reserved | al Please turn over ### Page 10 Downloaded from hlayiso.com Physical Sciences/P1 10 DBE/May/June 2024 SC/NSC Confidential QUESTION 4 (Start on a new page.) Two trolleys A and B of mass 3,2 kg and 2,6 kg respectively are held at rest on a straight horizontal, frictionless track, with a compressed spring between them, as shown in the diagram below. Before the spring is released A B 3,2 kg ing 2,6 kg — iTrack Compressed spring After the trolleys are released, the spring extends to its natural length and then falls onto the track. Trolley A now moves with a constant velocity of 0,4 m:s" to the left, while trolley B moves with a constant unknown velocity to the right. Trolley B reaches the end of the track after 1,3 s. After the spring is released [ 1 Extended spring 4.1 State the principle of conservation of linear momentum in words. (2) 4.2 Calculate the distance travelled by trolley B in 1,3 s. (5) The average force exerted by the extended spring on each trolley while they were in contact with the spring was 4,2 N. 4.3 Calculate the time it took the spring to extend to its natural length. (3) 44 Trolley B is now replaced by trolley C, which has a larger mass. The same compressed spring is placed between trollies A and C. The trolleys are then released. The average force exerted by the extended spring on the trolleys remains at 4,2 N for the same period of time as calculated in QUESTION 4.3. How does the magnitude of the velocity of trolley C compare to the magnitude of the velocity of trolley B after the spring has fallen to the track? Write only GREATER THAN, LESS THAN or EQUAL TO. Explain the answer. (3) [13] Copyright reserved ease turn over ### Page 11 Downloaded from hlayiso.com ECONOMICS 3 (PAPER 2) SECTION A (COMPULSORY) QUESTION 1 30 MARKS - 20 MINU TES 1.1 Various options are provided as possible answers to the following questions. Choose the answer and write only the letter (A — D) next to the question numbers (1.1.1 to 1.1.8) in the ANSWER BOOK, e.g. 1.1.9 D. 1.1.1 Which item best describes a private benefit, when conducting a CBA, of purchasing new capital machinery for a business? A _— Areduction in labour required B_ Additional maintenance C Purchase cost D Training Cost 1.1.2. What does productive efficiency refer to in Economics? A Maximising profits B_ Minimising costs C Optimising market shares D Setting high prices 1.1.3 When firms impose their production expenses on third parties, it is known as ... A private cost. B average cost. C negative externalities. D a production externality. 1.1.4 The following will always be true for a monopolistic competitive firm: A AR=MR B P=ATC C ARMR 1.1.5 The demand curve of a monopolistic competitive firm is ... A negatively sloping. B kinked. C positively sloping. D horizontal. 1.1.6 An imperfect market that can only make normal profits in the short run: A Oligopoly B — Monopolistic competition C Monopoly D Perfect market D&S cautens province a2 3 ### Page 12 Downloaded from hlayiso.com ECONOMICS 4 (PAPER 2) GRt2 0624 1.1.7 A feature of a perfect market is: A _ Sellers have significant market power. B Prices can be set higher than the market price. C Products are differentiated. D_ Firms are price takers. 1.1.8 Ifa business in a perfect market increases its output, the total revenue of that business will ... A show no change. B decrease. C increase. D reset. (8 x 2) (16) 4.2 Choose a description from COLUMN B that matches the item in COLUMN A. Write only the letter (A — 1) next to the question numbers (1.2.1 to 1.2.8) in the ANSWER BOOK, e.g. 1.2.9 J. COLUMNA COLUMN B 1.2.1 Allocative efficiency all the costs divided by the quantity of output produced 4.2.2 Factor immobility occurs when two or more firms in the 1.2.3 Average cost same industry informally agree to control the market 1.2.4 Perfect market costs that cannot be recovered once 1.2.5 Progressive income tax incurred 1.2.6 Tacit/Implicit collusion cannot be utilised between industries 1.2.7 Sunk costs costs that can be recovered once incurred 1.2.8 Rent-seeking the pursuit of income through activities that do not create any additional value fierce competition prevents long term economic profit a system where the wealthy pay more, and low-income earners pay less the efficient distribution of resources to meet the preferences of consumers SOs GAUTENG PROVINCE, ay (8 x 1) (8) ### Page 13 Downloaded from hlayiso.com ECONOMICS 5 (PAPER 2) GR12 0624 1.3. Give ONE term for each of the following descriptions. Write only the term next to the question numbers (1.3.1 to 1.3.6) in the ANSWER BOOK. Abbreviations, acronyms and examples will NOT be accepted. 1.3.1. A systematic way of evaluating the social, economic, and environmental impact of a particular project 1.3.2 A situation where markets do not exist or cannot meet the demand for certain goods 1.3.3. The communication of information about a product or service to potential consumers 1.3.4 Asmall number of large firms that dominate the entire industry 1.3.5 The reduction in producer or consumer surplus due to the introduction of a tax or subsidy 1.3.6 Acollective term for the classification of markets based on the number of firms, product differentiation, entry barriers, and market power (6x1) (6) TOTAL SECTION A: 30 AS ### Page 14 Downloaded from hlayiso.com ECONOMICS (PAPER 2) IGR12 0624 SECTION B Answer any TWO of the three questions in this section in the ANSWER BOOK. QUESTION 2: MICROECONOMICS 40 MARKS - 30 MINUTES 2.1 2.2 Answer the following questions. 2.1.1. Name TWO characteristics of a demand curve of business in a perfectly competitive market. 2.1.2 Whyis price discrimination not possible for firms in a perfect market? Study the following cartoon and answer the questions that follow. AVIAN/BIRD FLU SEES FOUR MILLION CHICKENS DESTROYED, RAISING EGG DILEMMA FOR SA CONSUMERS on PSST! .. Watches? ... Eggs? Be Avian flu has triggered an egg shortage in South Africa — and some industry players have raised concerns about supplies of poultry products. [Adapted source: Daily Maverick} 2.2.1 How will the avian flu outbreak impact the market supply of eggs? 2.2.2 Whatis the effect of the flu outbreak on egg prices? 2.2.3 Briefly describe the term marginal product. 2.2.4 Explain why eggs are homogeneous goods. 2.2.5 How do fluctuations in the market price of eggs impact the revenue of smaller producers? SOF GauTens Province (2) (2) (1) (1) (2) (2) (4) ### Page 15 Downloaded from hlayiso.com ECONOMICS 7 (PAPER 2) IGR12 0624] 2.3 Study the information below and answer the questions that follow. STANDARD CHARTERED BANK (SCB) TO PAY R42,7M PENALTY IN EXCHANGE RATE MANIPULATION MATTER 15 November 2023 By: Marleny A rnoldi The SCB admitted liability to the manipulation of the US dollar and rand currency exchange rate. The bank agreed to pay an administrative penalty of R42,7-million. The SCB furthermore participated in dividing markets by allocating customers in terms of 7 aoe: which one trader withholds or pulls his/her am Nol Veiled existing bid or offer from the market to allow the other trader to execute and complete his/her trade. This conduct contravenes Section 4 of the Competition Act. [Adapted source: Creamer Media] 2.3.1 Identify the competition institution with the highest authority. (1) 2.3.2 Give ONE objective of the Competition Act. (1) 2.3.3 Briefly describe the term competition. (2) 2.3.4 Explain the role of the competition commission regarding the exchange rate manipulation matter. (2) 2.3.5 How can the manipulation of the exchange rate impact businesses that are competing in world markets? (4) 2.4 Draw a correctly labelled graph and explain how the supply curve is derived from cost curves. ; (8) 2.5 How does the slope of the total cost curve change in relation to changes in the output quantity produced? (8) [40] SBR oo nOviNes ### Page 16 3.1 3.2 Downloaded from hlayiso.com ECONOMICS 8 (PAPER 2) GR12 0624} QUESTION 3: CONTEMPORARY ECONOMIC ISSUES 40 MARKS - 30 MINUTES Answer the following questions. 3.1.1. Give any TWO examples of explicit costs. (2) 3.1.2 How does collusion affect the global competitiveness of South African businesses? (2) Study the cartoon below and answer the questions that follow. SAVE OUR AIRLINE fee ' Ny Ay ‘ Aces % Waa oe [Adapted source: www.zapiro.com] 3.2.1 Identify the state enterprise depicted in the cartoon above. (1) 3.2.2 Name the market structure under which it operates. (1) 3.2.3 Briefly describe the term overt/expiicit collusion. (2) 3.2.4 Why is it difficult for new firms to enter the airline industry? (2) 3.2.5 What impact would the collapse of the airline have on the South African economy? (4) SOE GAUTENG FROWNCE ### Page 17 Downloaded from hlayiso.com ECONOMICS 9 (PAPER 2) GR12 06 24 3.3. Study the logos below and answer the questions that follow. ne CE ane, THIEKBUR [Adapted source: www.googleimages.corn] 3.3.1 State the nature of the products in the market as illustrated above. (1) 3.3.2 Name ONE other industry that operates in this market structure. (1) 3.3.3 Briefly describe the term non-price competition. (2) 3.3.4. Why are monopolistic competitive businesses reluctant to compete based on prices? (2) 3.3.5 Explain briefly why businesses in the monopolistic market are said to be allocatively inefficient. (4) 3.4 Drawa well-labelled graph to illustrate economic profits for a monopoly market (without explanation). (8) 3.5 Analyse the relationship that exists between marginal revenue (MR) and average revenue (AR) in a monopolistically competitive market. (8) [40] SADR caviencrnomue aes ### Page 18 Downloaded from hlayiso.com ECONOMICS 40 (PAPER 2) IGR12 0624 QUESTION 4: MICROECONOMICS AND CONTEMPORARY ECONOMIC ISSUES 40 MARKS - 30 MINUTES 4.1 Answer the following questions. 4.41.1 Name TWO types of goods that are supplied by the government. (2) 4.1.2 How does direct control lead to the misallocation of resources? (2) 4.2 Study the graph below and answer the questions that follow. GOVERNMENT TO CONSIDER SETTING A PRICE CEILING FOR UNLEADED PETROL 8 + s “Government is deeply o concerned by the rising cost of petrol in South Africa,” said Radebe at a post-Cabinet briefing. The government has now decided to examine a whether it should set a maximum price for unleaded fuel. i i > 0 Qi Qe Qe Quantity [Adapted source: Mail & Guardian] 4.2.1 Identify the quantity supplied if the price ceilings are enforced. (1) 4.2.2 Name ONE benefit of the price ceiling for motorists. 4.2.3 Briefly describe the term minimum price. 4.2.4 Explain the implications of a price ceiling set above the market price. 4.25 How can the proposed price ceiling on unleaded petrol lead to black markets? (1) (2) (2) (4) ### Page 19 Downloaded from hlayiso.com ECONOMICS 11 (PAPER 2) GR12 06 24 4.3. Study the text and the table below and answer the questions that follow. COST AND BENEFIT ANALYSIS Imagine two power stations. Station A (thermal) is cheap to build but expensive to run, while Station B (nuclear) is expensive to build but cheap to run. The economic costs and benefits calculated using net present values for the two projects are given below: Project ‘Economic cost (R)_| Economic benefits (R) | Station A (thermal) 140 billion 290 billion | Station B (nuclear) 450 billion 900 billion [Source: Examiner] 4.3.1 Identify ONE method used when calculating the CBA above. (1) 4.3.2 Name the project with the least economic costs. (1) 4.3.3 Briefly describe the term social benefits. (2) 4.3.4 What is the challenge of applying the cost-benefit analysis? (2) 4.3.5 How can the South African government use the cost-benefit analysis to prevent market failure? (4) 4.4 Discuss the effects of minimum wages as a consequence of market failure. (8) 4.5 What are the unintended consequences, in addition to lower production costs, of government subsidies on the agricultural sector? (8) [40] TOTAL SECTION B: 80 EGBA coureus roms fa os) ### Page 20 Downloaded from hlayiso.com ECONOMICS (PAPER 2) SECTION C Answer ONE of the two question in this section in the ANSWER BOOK. Your answer will be assessed as follows: MARK STRUCTURE OF ESSAY ALLOCATION Introduction The introduction is a lower-order response. e Agood starting point would be to define the main concept related to the question topic. e DoNOT include any part of the question in your Max. 2 introduction. Do NOT repeat any part of the introduction in the body. Avoid mentioning in the introduction what you are going to discuss in the body. Body Main part: Discuss in detail/In-depth discussion/Examine/ Critically discuss/Analyse/Compare/Evaluate/Distinguish/ Differentiate/Explain/Draw a graph and explain/Use the graph given and explain/Complete the given graph/Assess/Debate A maximum of 8 marks may be allocated for headings/ examples. Max. 26 Additional part: Critically discuss/Evaluate/ Critically evaluate/ Debate/Deduce Compare/Distinguish/ interpret/How?/Suggest A maximum of 2 marks may be allocated for the mere listing of facts. Max. 10 Conclusion Any higher-order conclusion should include: e A brief summary of what has been discussed without repeating facts already mentioned e Any opinion or value judgement on the facts discussed Additional support information to strengthen the discussion/analysis e Acontradictory viewpoint with motivation, if required e Recommendations Max. 2 TOTAL 40 ### Page 21 Downloaded from hlayiso.com QUESTION 5: MICROECONOMICS e Discuss in detail the various equilibrium positions of a firm in a perfect market, with the aid of graphs. e How do the pressures of competing in a perfect market affect the ethical behaviour of firms? QUESTION 6: MICROECONOMICS e Discuss in detail, without the use of graphs, the characteristics of monopoly as a market structure. e = Critically analyse the existence of monopolies in addressing socio-economic issues in South Africa. ECONOMICS 43 (PAPER 2) GR12 0624] 40 MARKS — 40 MINUTES (26) (10) [40] 40 MARKS - 40 MINUTES (26) (10) [40] TOTALSECTIONC: 40 TOTAL: 150 ### Page 22 Downloaded from hlayiso.com ### Page 23 Downloaded from hlayiso.com Physical Sciences/Pt 11 DBE/May/June 2024 SC/NSC Confidential QUESTION 5 (Start on a new page.) A crate of mass 18 kg, initially at rest, slides down a frictionless slope from point A to point B. The crate then moves along a rough horizontal surface from point B towards point C. Point A is 3 m above the horizontal surface. See the diagram below. A A ' t 3m t H YORE — B c 5.1 State the principle of conservation of mechanical energy in words. 5.2 Using ENERGY PRINCIPLES only, calculate the speed of the crate at point B. A constant frictional force of 40,6 N acts on the crate as it moves from point B towards point C. The crate comes to rest at point C. 5.3 State the work-energy theorem in words. 5.4 Using ENERGY PRINCIPLES only, calculate the distance that the crate travelled from point B to point C. 5.5 The height of the track is now lowered so that point A is at a vertical height less than 3 m. The same crate is again released from point A. How will the distance now, travelled by the crate along the horizontal surface before it comes to rest, compare to the distance calculated in QUESTION 5.4? Write only GREATER THAN, SMALLER THAN or EQUAL TO. Explain the answer. Copyright reserved iO; ay P as@ turn over (2) (3) (2) (4) (3) [14] ### Page 24 Downloaded from hlayiso.com Physical Sciences/P1 12 DBE/May/June 2024 SC/NSC Confidential QUESTION 6 (Start on a new page.) A stationary listener records the frequency of the sound emitted by the siren of a police car. When the car which is travelling at a constant velocity of 26 m-s"', approaches the listener, the recorded frequency is 615 Hz. The car passes the listener at time t, and then moves away from the listener. The recorded frequency now is 526 Hz. Ignore the effects of wind. 6.1 State the Doppler effect in words. (2) 6.2 Use the information given to calculate the speed of sound in air. (5) 6.3 Calculate the wavelength of the sound emitted by the police siren. (4) 6.4 Sketch the graph of recorded frequency versus time for the motion of the car as it moved towards the listener, passed the listener and then moved away from the listener. Label time t, on the graph. No values need to be indicated on the frequency axis. (3) [14] Copyright reserved = Please turn over ### Page 25 Downloaded from hlayiso.com Physical Sciences/P1 13 DBE/May/_une 2024 SC/NSC Confidential QUESTION 7 (Start on a new page.) 71 X is a point 0,025 m away from a +4 nC point charge. See the diagram be low. +4nC @ °x }*—— 0,025 m ——>| 7.164 Draw the electric field pattern due to the +4 nC charge. (2) 7.1.2 Calculate the magnitude of the electric field at point X. (3) 7.2 Two identical neutral polystyrene balls A and B are suspended from a ceiling by insulated, light inextensible strings of equal length, as shown in the diagram below. ceiling A) © Ball B is then given an initial negative charge, Qe, of unknown magnitude. The balls attract each other, touch and then repel each other. The balls come to rest with their centres 10 cm apart so that each string makes an angle of 9° with the vertical. See the diagrams below. ceiling ceiling AXE) — 10cm — 7.2.1 State Coulomb's Law in words. (2) 7.2.2 Calculate the magnitude of the initial charge Qg given to ball B if the mass of each ball was 0,012 kg. (6) [13] Copwright reserved Sere Please turn over “7 ### Page 26 Downloaded from hlayiso.com Physical Sciences/P1 14 DBE/May/June 2024 SC/NSC Confidential QUESTION 8 (Start on a new page.) A battery of emf 12 V and internal resistance 0,2 Q is connected to three resistors, a high-resistance voltmeter and two switches, an ammeter and connecting wires of negligible resistance, as shown in the circuit diagram below. The three resistors have different and unknown resistances. Rx S2 | Ry Rz ©) The resistance of Ry is TWICE the resistance of Rx. When both switches are CLOSED, the reading on the ammeter is 5,5 A. 8.1 Give a reason why there is no current through resistor Rz. (1) 8.2 Calculate the resistance of resistor Ry. (5) 8.3 Calculate the power dissipated by resistor Rx. (4) When both switches are now OPENED, the reading on the ammeter is 1,3 A. 8.4 Calculate the reading on the voltmeter. (3) Switch $, remains OPEN while switch S2 is now CLOSED. 8.5 Calculate the reading on the ammeter. (6) [19] Copyright reserved Ao Please turn over ### Page 27 Downloaded from hlayiso.com Physical Sciences/P1 15 DBE/May/June 2024 SC/NSC Confidential QUESTION 9 (Start on a new page.) The simplified diagram below represents an AC generator with a coil rotating clockwise. X and Y are two points in the external circuit. N S$ Y R X 9.1 What is the direction of the current in the external circuit? Write either X to Y or Y to X. (2) 9.2 State the energy conversion that takes place in this generator. (1) The maximum voltage produced by the generator is 125 V. 9.3 Define the term root mean square voltage. (2) 9.4 Calculate the root mean square voltage of the generator. (3) 9.5 The total resistance in the external circuit is 42,4 Q. Caiculate the maximum current induced. (3) 9.6 The generator induced current at a frequency of 20 Hz. The coil started rotating from the initial position, as shown in the diagram above. Sketch a graph of induced current versus time for two complete rotations of the coil. Indicate the following on the graph: ¢ The time taken for two rotations ¢ The maximum current induced by the generator (4) [15] Copyright reserved | ay Flease tiirr over ### Page 28 Physical Sciences/P? 16 DBE/May/June 2024 Downloaded from hlayiso.com SC/NSC Confidential QUESTION 10 (Start on a new page.) 10.1 10.2 10.3 Copyright reserved Define the term photoelectric effect. Light of wavelength 4,7 x 107 m is shone onto the surface of a piece of caesium metal. If the threshold frequency of caesium is 4,37 x 10"* Hz, calculate the maximum speed of an electron ejected from the surface of the metal. A simple electroscope consists of a zinc disc, a metal stem and a thin length of gold foil. When the electroscope is neutral, the foil hangs vertically, as shown in DIAGRAM 1 below. When the electroscope is negatively charged, the foil is repelled from the stem, as shown in DIAGRAM 2 below. Neutral electroscope Negatively charged electroscope Disc Disc Stem |} Stem DIAGRAM 1 DIAGRAM 2 When ultraviolet light is shone on the disc of the negatively charged zinc electroscope, the foil collapses towards the stem (hangs vertically). 10.3.1 How does the frequency of the ultraviolet light compare to the threshold frequency of zinc? Write only HIGHER THAN, LOWER THAN or EQUAL TO. 10.3.2 Explain why the foil of the electroscope collapses. Green light is now shone on another negatively charged zinc electroscope. The foil does not collapse. 10.3.3 Will the foil collapse if the intensity of the green light is increased? Write either YES or NO. Give a reason for the answer. TOTAL: OFAC] (2) (5) (1) (3) (2) [13] 150 ### Page 29 Downloaded from hlayiso.com Physical Sciences/P1 1 DBE/May/lurie 2024 SC/NSC DATA FOR PHYSICAL SCIENCES GRADE 12 PAPER 1 (PHYSICS} GEGEWENS VIR FISIESE WETENSKAPPE GRAAD 12 VRAESTEL 1 (FISIKA) TABLE 1: PHYSICAL CONSTANTS/TABEL 1: FISIESE KONSTANTES NAME/NAAM SYMBOL/SIMBOOL VALUE/WAARDE Acceleration due to gravity 98m-s2 Swaartekragversnelling ' Universal gravitational constant AT Rp 2 Universele gravitasiekonstante S SHEE ia ral Radius of the Earth 6 Radius van die Aarde Re 6,38 x 10° m Mass of the Earth Me 5,98 x 104 kg Massa van die Aarde Spoed van ig in h vaku c 3,0 x 10° ms" Planek 9 Konstante h 6,63 x 10 J-s Coulomb earn k 9,0 x 10°N-m?-C? ea op pean e -1,6x 10°C eee Me 9,11 x 107" kg Copyright reserved Of il Plena turn over ### Page 30 Downloaded from hlayiso.com Physical Sciences/P1 2 DBE/May/June 2024 SC/NSC TABLE 2: FORMULAE/TABEL 2: FORMULES MOTION/BEWEGING Vi = Vi + aAt Ax = viAt + Yat? or/of Ay = viAt + Yaat? vi =v? + 2adx orlof vj = vi + 2aAy Ax= (* a: Ja orlof Ay = [Sg a FORCE/KRAG Fret = ma p=mv fn = AN f= HN FretAt = Ap w= Ap = mv; - MVj mg FGM onfof = GTP | g = ok oof g= coe WORK, ENERGY AND POWERIARBEID, ENERGIE EN DRYWING W = FAxcos 6 U=mgh orlof E,=mgh Whet = AK orfof = Wher = AEx K=vemv? orlof Ex = amv’ AK=Kr-K, orfof AK=Ene—Ex Ww Wae = AK + AU orfof Wre = AEK + AE, | P = Te Pave = FVave / Pgemia = FVgemia WAVES, SOUND AND LIGHT/GOLWE, KLANK EN LIG 1 v=fa T =F _ VEv, _ vVtvye i= viv, hf is vty, fy E=hf oof E= ne E=Wot Excmaxy or/of E=Wo + Kimax) where/waar E=hf and/en Wo =hfo and/en Ex = %mv2,, orfof Kmax = MV, Copyright reserved al Please turn over Este ### Page 31 Downloaded from hlayiso.com DBE/May/Jurne 2024 Physical Sciences/Pt ELECTROSTATICS/ELEKTROSTATIKA 3 SC/NSC _ kQ,Q, F 72 Ve ne= orfof n= ©|O| o/s a ELECTRIC CIRCUITS/ELEKTRIESE STROOMBANE emf (€)=KR +r) R=” l emk (£)=I(R +r) R, =R, +R, + J1_1,14, q= IAt R, RR, W=Vq p- At W = VIAt P=VvI W = PRat P=PR _ Vt we R pv R ALTERNATING CURRENT/WISSELSTROOM I. = rms V2 wok V2 View = Vag =~ Pave =Vimslims / Pagemia = Vwaklwok Pare = TinsR 1 Paemit = Fag rms! 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