Physical Sciences Grade 10 P1 North West June 2024 QP (Eng)

PROVINCIAL ASSESSMENT GRADE 10 PHYSICAL SCIENCES: PHYSICS (P1) JUNE 2024 MARKS: 75 TIME: 1½ hours This question paper consists of 10 pages and 2 data sheets. Copyright reserved Please turn over

Physical Sciences/P1 2 NW/June 2024 Grade 10 INSTRUCTIONS AND INFORMATION Read the following instructions carefully before answering the questions. 1. Write your name on the ANSWER BOOK. 2. This question paper consists of SIX 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 open 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. 11. You are advised to use the attached DATA SHEETS. 12. Write neatly and legibly. Copyright reserved Please turn over

Physical Sciences/P1 3 NW/June 2024 Grade 10 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 1.7) in the ANSWER BOOK, e.g.1.8 E. 1.1 Which of the following best defines a transverse wave? A A wave where the particles of the medium move parallel to the direction of wave propagation. B A wave where the particles of the medium move perpendicular to the direction of wave propagation. C A wave where the particles of the medium do not move at all. D A wave that can only propagate in a solid medium. (2) 1.2 If the frequency of a wave increases while its wavelength remains constant, what happens to the speed of the wave? A It increases B It decreases C It remains constant D It depends on the amplitude of the wave (2) 1.3 An observer counts four complete water waves passing by the end of a dock every 10 seconds. What is the frequency of the waves? A 40 Hz B 4,0 Hz C 2,5 Hz D 0,40 Hz (2) Copyright reserved Please turn over

Physical Sciences/P1 4 NW/June 2024 Grade 10 1.4 Which graph represents the relationship between frequency and period of a wave? (2) 1.5 Which of the following colours of visible light has the lowest energy? A Blue B Green C Red D Yellow (2) 1.6 Consider two point charges, Q1 and Q2, placed a distance r apart in a vacuum. If the force between the charges is repulsive, which of the following statements is true? r Q1 Q2 A Q1 and Q2 must have the same charges. B Q1 and Q2 must have opposite charges. C The magnitude of Q1 must be greater than the magnitude of Q2. D The magnitude of Q1 must be less than the magnitude of Q2. (2) Copyright reserved Please turn over

Physical Sciences/P1 5 NW/June 2024 Grade 10 1.7 Consider the circuit diagram with three resistors given below: How will the readings on voltmeters V1, V2 and V3 compare with each other? A V1 = V2 = V3 B V1 = V2 + V3 C V1 > V2 + V3 D V3 > V1 + V2 (2) [14] Copyright reserved Please turn over

Physical Sciences/P1 6 NW/June 2024 Grade 10 QUESTION 2 (Start on a new page.) A snapshot of a transverse wave is given below, the wave has a frequency of 0,8 Hz and is moving from left to right. 2.1 Define the term frequency. (2) 2.2 Name the following: 2.2.1 Two points that are out of phase. (1) 2.2.2 Point D. (1) 2.3 Determine: 2.3.1 Wavelength of this wave. (2) 2.3.2 Amplitude of the wave in meters. (3) 2.4 Look at this diagram of pulse D and pulse A (from a different transverse wave which is moving from right to left). The two pulses will meet at point X and the resultant amplitude will be – 2 m. 2.4.1 Name the type of interference that will take place. (1) 2.4.2 Draw a labelled diagram to show the resultant pulse when the two pulses meet at point X. (2) [12] Copyright reserved Please turn over

Physical Sciences/P1 7 NW/June 2024 Grade 10 QUESTION 3: (Start on a new page.) The grade 10 class conducted experiments to investigate the effect of temperature on the speed of sound. One of the learners blew a whistle, while another learner 80 m away recorded the time travelled by the sound. 80 m The experiments were done at different temperatures at different times of the day. They recorded their findings in the table below: TEMPERATURE (˚C) TIME (s) 10 0,240 15 0,238 20 0,237 25 0,236 30 0,235 3.1 For this investigation, write down the: 3.1.1 Independent variable. (1) 3.1.2 Dependant variable. (1) 3.2 Calculate the speed of sound at 25˚C. (3) 3.3 Write down a conclusion for this investigation. (2) 3.4 Consider the following diagrams that represent sound waves as shown on an oscilloscope: 3.4.1 Identify the wave with the higher pitch. (1) 3.4.2 Identify the wave that produces the loudest sound. (1) [9] Copyright reserved Please turn over

Physical Sciences/P1 8 NW/June 2024 Grade 10 QUESTION 4: (Start on a new page.) Consider the diagrams below of different electromagnetic radiation and answer the questions that follow: Cell phone Microwave UV – tanning bed TV Remote X – ray Gamma rays 4.1 Why are electromagnetic waves unique in comparison to other waves? (2) 4.2 Give the type of electromagnetic waves that are used in: 4.2.1 Cell phone (1) 4.2.2 TV remote (1) 4.3 Looking at the examples of electromagnetic radiation, which one has the highest energy? (1) 4.4. Give a reason for your answer to QUESTION 4.3 (1) 4.5 A photon has a wavelength of 700 nm. 4.5.1 Define the term photon. (2) 4.5.2 Calculate the energy of this photon. (4) [12] Copyright reserved Please turn over

Physical Sciences/P1 9 NW/June 2024 Grade 10 QUESTION 5: (Start on a new page.) Two identical insulated spheres, A and B, suspended by threads from a ceiling, are held at a small distance apart, as shown in the diagram below. The spheres carry charges of +5 nC and -2 nC respectively. 5.1 State the Principle of Conservation of Charge. (2) 5.2 Is there a SHORTAGE or EXCESS of electrons on the -2 nC object before contact? (1) The two spheres are brought into contact and then separated again. 5.3 In what direction will electrons be transferred during contact? Write only FROM A TO B or FROM B TO A. (1) 5.4 Apply the principle of conservation of charge in order to calculate the new charge on the objects after separation. (3) 5.5 Calculate how many electrons are on each object after contact. (3) A charged ruler is brought closer to neutral pieces of paper. The pieces of paper are attracted to the ruler, as shown below. 5.6 Explain why the pieces of paper are attracted to the ruler. (2) [12] Copyright reserved Please turn over

Physical Sciences/P1 10 NW/June 2024 Grade 10 QUESTION 6: (Start on a new page.) The circuit diagram below consists of four cells each with a voltage of 1,5 V. The resistance of bulbs A, B and C are 3 Ω, 6 Ω and 8 Ω respectively. Use the circuit diagram to answer questions that follow: Switch S is closed. 6.1 Define the term current strength. (2) 6.2 Determine the voltmeter readings on: 6.2.1 V1 (2) 6.2.2 V2 (2) 6.3 Determine the reading on the ammeter (A). (3) 6.4 Calculate the: 6.4.1 Effective resistance of the circuit. (3) 6.4.2 Amount of charge that is passing through resistor C in 20 s. (3) 6.5 If bulb B fuses, how will this affect the total current of the circuit? Write down INCREASES, DECREASES or REMAINS THE SAME. (1) [16] TOTAL: 75 Copyright reserved Please turn over

Physical Sciences/P1 1 NW/June 2024 Grade 10 DATA FOR PHYSICAL SCIENCES GRADE 10 PAPER 1 (PHYSICS) TABLE 1: PHYSICAL CONSTANTS NAME SYMBOL VALUE Acceleration due to gravity g 9,8 m·s-2 Speed of light in a vacuum c 3,0 x 108 m·s-1 Planck's constant h 6,63 x 10-34 J·s Charge on electron e- -1,6 x 10-19 C Electron mass me 9,11 x 10-31 kg TABLE 2: FORMULAE MOTION v f  v i  a t x  v i t  21 at 2  v  vi  v f 2  vi2  2ax x   f  t  2  WORK, ENERGY AND POWER 1 K  E k  mv 2 U  E P  mgh 2 EM  Ek  E p or E M  K  U WAVES, LIGHT AND SOUND 1 vf T f c E = hf or E  h  Copyright reserved Please turn over

Physical Sciences/P1 2 NW/June 2024 Grade 10 ELECTROSTATICS Q Q1  Q2 n Q e 2 ELECTRIC CIRCUITS V 1 1 1 R    ... I R p R1 R 2 Q  I t R s  R1  R 2  ... W V Q Copyright reserved