Physical Sciences Grade 10 P1 Gauteng June 2019 QP (Eng)

Downloaded from hlayiso.com GAUTENG DEPARTMENT OF EDUCATION PROVINCIAL EXAMINATION JUNE 2019 GRADE 10 PHYSICAL SCIENCES PAPER 1 TIME: 1½ hours MARKS: 100 10 pages, 1 data sheet and 1 graph paper P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES GRADE 10 2 PAPER 1 GAUTENG DEPARTMENT OF EDUCATION PROVINCIAL EXAMINATION PHYSICAL SCIENCES TIME: 1½ hours MARKS: 100 INSTRUCTIONS 1. Write your name in the appropriate space on the ANSWER BOOK. 2. This question paper consists of 6 questions. Answer ALL the questions. 3. Remove the graph paper, page 12 and hand it in with your ANSWER BOOK. 4. You may use a non-programmable calculator. 5. You may use appropriate mathematical instruments. 6. YOU ARE ADVISED TO USE THE ATTACHED DATA SHEETS. 7. Number the answers correctly according to the numbering system used in this question paper. 8. Write neatly and legibly. 9. Start EACH question on a NEW page in the ANSWER BOOK. 10. Leave ONE line between two sub-questions, for example between QUESTION 2.1 and QUESTION 2.2. 11. Show ALL formulae and substitutions in ALL calculations. 12. Round off your FINAL numerical answers to a minimum of TWO decimal places where needed. 13. Give brief motivations, discussions, et cetera where required. P.T.O

Downloaded from hlayiso.com PHYSICAL SCIENCES GRADE 10 3 PAPER 1 SECTION A QUESTION 1: MULTIPLE-CHOICE QUESTIONS Four options are provided as possible answers to the following questions. Each question has only ONE correct answer. Write only the letter (A-D) next to the question number (1.1-1.10) on the answer sheet. Each answer counts TWO MARKS. 1.1 What is the magnitude of the angle between the direction of the disturbance and the direction of propagation of a transverse wave? A 0° B 45° C 90° D 180° (2) 1.2 The diagram shows two waves travelling in the same medium for the same length of time. The two waves have different… A amplitudes. B speeds. C energies. D frequencies. (2) P.T.O

Downloaded from hlayiso.com PHYSICAL SCIENCES GRADE 10 4 PAPER 1 1.3 Two points on a transverse wave that have the same magnitude of displacement from equilibrium are said to be in phase if these points also have the … A same direction of displacement and the same direction of motion. B same direction of displacement and the opposite direction of motion. C opposite direction of displacement and the same direction of motion. D opposite direction of displacement and the opposite direction of motion. (2) 1.4 If two charges are identical with one having a charge Q, and they are brought together to touch each other and are then separated. The new charge on each will be… A Q. B 2Q. C . D 4Q. (2) 1.5 The region in a space where a magnetic material will experiences a force is called a/an … A charge. B electric field. C magnetic field. D magnetic flux. (2) 1.6 Which one of the following is equal to 10 C.s-1? A 10 V B 10 A C 10 Ω D 10 nC (2) 1.7 For which ONE of the quantities below is the CORRECT unit of measurement for the given quantity? QUANTITY UNIT A Current A.s-1 B Energy kW C Potential difference V D Resistance V.s P.T.O

Downloaded from hlayiso.com PHYSICAL SCIENCES GRADE 10 5 PAPER 1 1.8 Consider the following statements concerning ultraviolet radiation: (i) It can be reflected. (ii) It has a longer wavelength than gamma rays. (iii) It is radiated from the sun and may be harmful to humans. A (i) and (ii) only B (ii) and (iii) only C (i) and (iii) only D (i), (ii) and (iii) 1.9 Choose the CORRECT combinations below concerning the pitch and loudness of sound. The pitch and loudness of sound depend on: PITCH LOUDNESS A Frequency Amplitude of vibration B Frequency Speed of vibration C Amplitude of vibration Frequency D Speed of vibration Frequency 1.10 Two pulses travel towards each other as shown in the diagram. When they meet, the resultant displacement and type of interference will be: RESULTANT DISPLACEMENT TYPE OF INTERFERENCE A 4a Constructive B 2a Constructive C -2a Destructive D -4a Destructive [20] P.T.O

Downloaded from hlayiso.com PHYSICAL SCIENCES GRADE 10 6 PAPER 1 SECTION B QUESTION 2 2.1 The diagram below shows two waves A and B of the same wavelength but different amplitudes crossing each other. position vs time B A b position (m) a time (s) -a -b 2.1.1 Define the term wavelength. (2) 2.1.2 Draw the shape of the resulting wave as the two waves A and B cross. On your (4) diagram show the resulting amplitude. 2.1.3 Which wave property is illustrated in QUESTION 2.1.2? (2) 2.1.4 State the principle used to answer QUESTION 2.1.2. (2) 2.2 In the sketch below, not drawn to scale, Q represents an object on the surface of the water in a dam. A person standing on a bridge observes object Q moving up and down. Object Q rises to the top every 5 s. position (m) 1,5 m 1 Q● . 2.2.1 Define the term period of a wave. (2) 2.2.2 In which direction is object Q about to move? Write only UPWARDS or (2) DOWNWARDS. 2.3 Calculate the … 2.3.1 frequency of the waves. (4) 2.3.2 speed of the waves. (4) [22] P.T.O

Downloaded from hlayiso.com PHYSICAL SCIENCES GRADE 10 7 PAPER 1 QUESTION 3 A section of the sound wave produced by a musical instrument is shown below. 3.1 Define the term, pulse. (2) 3.2 Identify the components of the wave labelled 3.2.1 B (1) 3.2.2 A (1) 3.3 The highest frequency that a normal human ear can hear is about 20 kHz. A special whistle known as the silent whistle is used to train dogs. 3.3.1 If the whistle produces sound waves of wavelength 9 mm, determine, by (5) calculation, whether the human ear will hear the sound produced by this whistle. Take the speed of sound in air to be 342 m.s-1. 3.3.2 Name the type of sound produced by the silent whistle. (1) 3.4 A sound emitting device is placed between two buildings A and B, as shown below. A sound wave emitted from the device strikes building A perpendicularly and returns to the device after 1,0s. A second sound wave strikes building B perpendicularly and returns to the device after 1,5s. If the speed of sound in air at that point is 340 m.s-1, calculate the distance between the two buildings. (6) [16] P.T.O

Downloaded from hlayiso.com PHYSICAL SCIENCES GRADE 10 8 PAPER 1 QUESTION 4 4.1 Radio waves are observed to have a wavelength of 0,14 m. 4.1.1 Give ONE use of radio waves in technology. (1) 4.1.2 Calculate the energy of a photon of these radio waves. (4) 4.2 An athlete breaks his leg while jogging and goes to have X-rays taken. X-rays emitted by the x-ray machine have a wavelength of 1, 5 x 10−11 m. 4.2.1 At what speed do X-rays travel? (1) 4.2.2 Calculate the frequency of the wave. (2) 4.3 Overexposure to X-rays can be potentially dangerous. Provide a reasons for this statement. (2) [10] P.T.O

Downloaded from hlayiso.com PHYSICAL SCIENCES GRADE 10 9 PAPER 1 QUESTION 5 5.1 Two insulated, graphite-coated polystyrene spheres A and B are suspended from threads. The spheres are held apart at a small distance. The charges on the spheres A and B are – 8 C and + 20 C, respectively. When the spheres are released they move towards each other. A B 5.1.1 Explain why the spheres move towards each other when they are released. (2) 5.1.2 Which one of the two spheres has excess electrons? Write down SPHERE A or SPHERE B. (1) 5.2 The two spheres are allowed to touch each other and then separate. 5.2.1 Calculate the charge on each sphere after contact. (3) 5.2.2 Will the force now be one of ATTRACTION or REPULSION? Give a reason for your answer. (2) 5.2.3 State the principle of quantisation of charge. (2) 5.2.4 Determine the number of electrons transferred between the two spheres during contact. (4) (14) P.T.O

Downloaded from hlayiso.com PHYSICAL SCIENCES GRADE 10 10 PAPER 1 QUESTION 6 6.1 Consider the circuit below. When the switch is open and a voltmeter is connected across the battery it reads the emf of the battery. When the switch is closed, ammeter A1 reads 5A and ammeter A2 reads 3 A. 6.1.1 Define emf of a battery. (2) 6.1.2 Calculate the effective resistance of the combination of the two resistors. (3) 6.1.3 What will be the reading on ammeter A3 when the switch is closed? (3) Consider the circuit below. When the switch is closed, voltmeter V1 reads 4V, V2 reads 1.6 V and voltmeter V4 reads 1 V. 6.2 6.2.1 Calculate the effective resistance of the combination of the three resistors. (3) 6.2.2 Determine the voltmeter reading on V3 when the switch is closed. (2) 6.2.3 If the current passing through the 8 Ω resistor is 0,2 A, what will the current (2) through 5 Ω resistor be? Explain. 6.3 A charge of 48 C flows through a circuit in 2 minutes. Calculate the current flowing through the circuit. (3) [18] TOTAL: 100 P.T.O

Downloaded from hlayiso.com PHYSICAL SCIENCES GRADE 10 11 PAPER 1 DATA FOR PHYSICAL SCIENCES GRADE 10 PAPER 1 (PHYSICS) GEGEWENS VIR FISIESE WETENSKAPPE GRAAD 10 VRAESTEL 1 (FISIKA) TABLE 1: PHYSICAL CONSTANTS / TABEL 1: FISIESE KONSTANTES NAME / NAAM SYMBOL / SIMBOOL VALUE / WAARDE Speed of light in a vacuum C 3,0 x 108 m·sˉ1 Spoed van lig in 'n vakuum Plank's constant H 6,63 x 10-34 J·s Plank se konstante Charge on electron E -1,6 x 10ˉ19 C Lading op elektron Electron mass me 9,11 x 10ˉ31 kg Elektronmassa P.T.O

Downloaded from hlayiso.com PHYSICAL SCIENCES GRADE 10 12 PAPER 1 NAME: ______________________________________ CLASS: ______________________________________ END