Physical Sciences Grade 10 P1 Gauteng June 2023 QP (Eng)

Downloaded from hlayiso.com PROVINCIAL EXAMINATION JUNE 2023 GRADE 10 PHYSICAL SCIENCES (PHYSICS) PAPER 1 TIME: 2 hours MARKS: 100 9 pages + 1 data sheet P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) 2 (PAPER 1) INSTRUCTIONS AND INFORMATION 1. Write your name in the appropriate space on the ANSWER BOOK. 2. This question paper consists of 9 questions. Answer ALL the questions. 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. You may use a non-programmable calculator. 6. You may use appropriate mathematical instruments. 7. USE the DATA SHEET that is attached. 8. Show ALL formulae and substitutions in ALL calculations. 9. Round-off your FINAL numerical answers to a minimum of TWO decimal places. 10. Write neatly and legibly. P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) 3 (PAPER 1) GRADE 10 SECTION A: MULTIPLE-CHOICE QUESTIONS QUESTION 1 Four 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 number (1.1 to 1.8) in the ANSWER BOOK, e.g. 1.9 E. 1.1 Constructive interference takes place when … A the wavelengths of the combined pulses are smaller than the individual amplitudes. B the amplitudes of the combined pulses are smaller than the individual amplitudes. C the combined amplitudes of two pulses are in phase with each other. D the amplitudes of the combined pulses are greater than the individual amplitudes. (2) 1.2 A longitudinal wave is a wave where the particles in the medium … A move perpendicular to the direction of propagation of the wave. B move parallel to the direction of propagation of the wave. C move diagonal to the direction of propagation of the wave. D move adjacent to the direction of propagation of the wave. (2) 1.3 The amplitude and frequency of a sound wave are both DECREASED. How do these changes affect the loudness and the pitch of the sound? Loudness Pitch A Increased Raised B Increased Unchanged C Decreased Lowered D Decreased Raised (2) 1.4 The frequency of an electromagnetic wave with a wavelength of 2,1 x10-6 m is … A 1,43 x 1014 Hz. B 1,43 x 1012 Hz. C 2,6 x 1014 Hz. D 50 x 1012 Hz. (2) P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) 4 (PAPER 1) GRADE 10 1.5 John wants to decrease the resistance of an electrical circuit and has the following options: (i) Increase the length of the nichrome conductor (ii) Increase the thickness of the nichrome conductor (iii) Use a copper conductor instead of a nichrome conductor Which combination of his options would best reduce the resistance of the circuit? A (i), (ii) and (iii) B (i) and (ii) C (i) and (iii) D (ii) and (iii) (2) 1.6 The maximum work done per unit charge by a battery is the … A emf. B current. C resistance. D terminal potential difference. (2) 1.7 A positively charged rod is brought near the following objects: (i) Small uncharged pieces of paper (ii) A thin stream of water (iii) A positive charged balloon (iv) A negatively charged cloth Which of these objects will not be attracted to the rod? A (i), (ii) and (iii) B (i) and (ii) C (ii) and (iii) D (iii) (2) 1.8 A rubber balloon obtains a negative charge when rubbed against a rabbit’s fur. Which of the statements below best explains why this happens? A Negative charges are transferred from the rabbit’s fur to the rubber balloon. B Positive charges are transferred from the rubber balloon to the rabbit’s fur. C Negative charges are transferred from the rubber balloon to the rabbit’s fur. D Positive charges are transferred from the rabbit’s fur to the rubber balloon. (2) [16] P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) 5 (PAPER 1) GRADE 10 SECTION B: ELECTROSTATICS AND ELECTRICITY QUESTION 2 (Start on a new page.) A small, metal sphere A carrying a charge of – 4nC is placed on an insulated stand. 2.1 Were electrons added or removed from sphere A? (1) 2.2 How does the number of protons compare with the number of electrons in sphere A? Write down only LESS THAN, GREATER THAN or EQUAL TO. Give a reason for your answer. (3) 2.3 1013 electrons are now added to sphere A. Calculate the new charge on sphere A. (4) [8] QUESTION 3 (Start on a new page.) Two identical metal spheres B and C placed on an insulated stand, carry charges of +4 x 10-6 C and -6 x 10-6 C respectively as shown in the diagram below. The spheres are allowed to touch each other. After touching, the spheres are then separated and brought back to their original positions as shown in the diagram below. 3.1 State the principle of conservation of charge. (2) P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) 6 (PAPER 1) GRADE 10 3.2 Explain what occurred as the spheres touched each other. Explain why this reaction occurred after touching each other. (3) 3.3 Calculate the number of electrons transferred between the two spheres during contact. (4) [9] QUESTION 4 (Start on a new page.) The grade 10 learners want to investigate the relationship between current and potential difference. Their teacher gives them the following apparatus:  voltmeter  ammeter  connecting wires  5 cells The table below shows the results obtained during the investigation: Voltmeter (V) Ammeter (A) 1,5 0,7 3,0 1,4 4,5 2,0 6,0 2,7 7,5 3,4 4.1 Write down a possible investigative question. (2) 4.2 Name the dependent variable for this investigation. (2) 4.3 What is the control variable? (1) 4.4 Draw a graph of the potential difference versus current difference. Plot the points and connect them with a best fit straight line. (7) 4.5 From the graph drawn, deduce a relationship that exists between the current difference and the potential difference in a circuit. (2) [14] P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) 7 (PAPER 1) GRADE 10 QUESTION 5 (Start on a new page.) The circuit below shows two light bulbs 4Ω and 5Ω respectively, connected in PARALLEL to a 4,5 V battery. 5.1 Calculate the effective resistance of the circuit. (2) 5.2 Calculate the total current of the circuit. (3) 5.3 Calculate the amount of charge passing through the ammeter A2 in 10 s. (3) 5.4 Another resistor is connected in series next to ammeter A1. How will this change affect the total current of the circuit? Write down only DECREASES, INCREASES or REMAINS THE SAME. Give a reason for your answer. (3) [11] P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) 8 (PAPER 1) GRADE 10 SECTION C: WAVES, SOUNDS AND LIGHTS QUESTION 6 (Start on a new page.) 6.1 Two or more pulses can pass through the same medium at the same time in the same place. When they do, they interact with each other to form a different disturbance at that point. The resulting pulse is obtained by using the principle of superposition. State the principle of superposition of pulses. (2) 6.2 Destructive interference takes place when two pulses meet and result in a smaller amplitude disturbance. The amplitude of the resulting pulse is the sum of the amplitudes of the two initial pulses, but the one amplitude will be a negative number. Use the theory of destructive interference to draw TWO pulses of different amplitudes meeting from different directions to demonstrate this theory. (3) 6.3 A pulse covers 37,5 cm in 1,25 s on a heavy rope. Calculate the pulse speed in (m·s-1). (4) [9] QUESTION 7 (Start on a new page.) A transverse wave is travelling along a string. A point on the medium carrying the wave is observed. A graph of displacement versus time of the point is shown below. The vertical distance between a crest and a trough is 3,2 cm. 7.1 Define a transverse wave. (2) 7.2 How many full waves are there between t = 0 s and t = 0,21 s? (2) P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) 9 (PAPER 1) GRADE 10 7.3 From the information given, write down the amplitude of the wave. (2) 7.4 Calculate the period of the wave. (2) 7.5 If the wavelength of the wave is 0,4 m, calculate the speed of the wave. (4) [12] QUESTION 8 (Start on a new page.) 8.1 Grade 10 learners studied the relationship between the frequency and wavelength of different types of EM radiations. 8.1.1 Define the term electromagnetic radiation. (2) 8.1.2 Arrange the following types of EM radiation in order of increasing wavelength: infra-red; X-rays; ultraviolet; visible light; gamma rays (5) 8.1.3 Ultraviolet radiation is dangerous and can cause skin cancer. Explain how this radiation causes cancer when your skin is overexposed. (2) 8.2 Give ONE use for each of the following types of EM radiation: 8.2.1 X-rays (1) 8.2.2 Microwaves (1) 8.3 Calculate the wavelength of a radio wave with a frequency of 2,1 ×108 Hz. (4) [15] QUESTION 9 (Start on a new page.) The particle nature of light can be demonstrated by the interaction of photons with matter. One way in which light interacts with matter is via the photoelectric effect. 9.1 Define a photon. (2) 9.2 The infrared beam emitted by a projector remote has a wavelength of 1,3 μm. Calculate the energy of a photon of this infrared radiation. (4) [6] TOTAL: 100 END

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) 10 (PAPER 1) GRADE 10 DATA FOR PHYSICAL SCIENCES GRADE 10 PAPER 1 (PHYSICS) TABLE 1: PHYSICAL CONSTANTS Acceleration due to gravity g 9,8 m·s–2 Planck’s constant h 6,63 x 10 – 34 J·s 8 Speed of light in a vacuum c 3,0  10 m·s–1 Charge on electron e –1, 6x 10 C -19 TABLE 2: FORMULAE ELECTROSTATICS Q Q Q2 n Q 1 e 2 ELECTRICITY I  Q R S  r1  r 2  r3  .. . Δt V 1 1 1 1 R      .. . I RP R1 R2 R3 WAVES, SOUND AND LIGHT v=f T= 1 f c E = hf or E = h 