Physical Sciences Grade 10 P1 Gauteng June 2017 QP (Eng)

Downloaded from hlayiso.com GAUTENG DEPARTMENT OF EDUCATION PROVINCIAL EXAMINATION JUNE 2017 GRADE 10 PHYSICAL SCIENCES PAPER 1 TIME: 1½ hours MARKS: 100 11 pages + 1 data sheet P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 2 Paper 1 GRADE 10 GAUTENG DEPARTMENT OF EDUCATION PROVINCIAL EXAMINATION PHYSICAL SCIENCES GRADE 10 (Paper 1) TIME: 1½ hours MARKS: 100 INSTRUCTIONS AND INFORMATION 1. Answer ALL the questions in the ANSWER BOOK. 2. This question paper consists of TWO sections: SECTION A: 20 MARKS SECTION B: 80 MARKS 3. You may use a non-programmable calculator. 4. You may use appropriate mathematical instruments. 5. Number the answers correctly according to the numbering system used in this question paper. 6. Give brief substantiations, discussions, et cetera where required. 7. Round-off your final numerical answers to a minimum of TWO decimal places. P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 3 Paper 1 GRADE 10 SECTION A QUESTION 1: MULTIPLE-CHOICE QUESTIONS Four options are given as possible answers to the following questions. Choose the correct answer and write the letter (A – D) of your choice next to the question number in the ANSWER BOOK, e.g. 1.11 C. 1.1 Study the accompanying sketch. The following are represented by A, B and C: A Amplitude, trough, wavelength B Crest, trough, wavelength C Amplitude, wavelength, pulse length D Crest, trough, wavelength (2) 1.2 The speed of a pulse depends on the ... A distance that the pulse moves. B length of the pulse. C medium through which the pulse moves. D amplitude of the pulse. (2) P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 4 Paper 1 GRADE 10 1.3 The diagram below shows two points X and Y on a wave train. X Y How many wavelengths separate point X and Y? A 0,75 B 1 C 1,5 D 3 (2) 1.4 What would a drummer do to make a drum produce a lower pitch? A Hit the drum harder. B Hit the drum less hard. C Tighten the drum skin. D Loosen the drum skin. (2) 1.5 The following are arranged in order of increasing wavelength. A Microwaves, visible light, x-rays B X-rays, visible light, microwaves C Microwaves, x-rays, visible light D Visible light, x-rays, microwaves (2) P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 5 Paper 1 GRADE 10 1.6 Consider the following statements regarding magnetic fields. (i) The direction of magnetic field lines is from north to south. (ii) The strength of the magnetic field is indicated by the closeness of the field lines. (iii) The magnetic field of a bar magnet is weaker near its poles. Which of the above statements are CORRECT? A (i), (ii) and (iii) B (i) and (ii) C (i) and (iii) D (ii) and (iii) (2) 1.7 Two charged balls are hanging from light inextensible strings. They remain at rest with equal angles to the vertical as shown in the diagram below. This shows that ... A the balls have equal but opposite charges. B one is charged and the other is not charged. C the balls have opposite but not necessarily equal charges. D the balls have equal charges. (2) 1.8 Which of the following symbols represents the SI-unit of resistance? A R B C C Ω D A (2) P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 6 Paper 1 GRADE 10 1.9 All the resistors in the circuits below are identical. Which ONE of the following circuits has the highest total resistance? A B C D (2) 1.10 The amount of charge that passes through a resistor when a current of 1,2 A flows in 2,5 minutes is ... A 18 Ω. B 180 Ω. C 3 Ω. D 0,48 Ω. (2) TOTAL SECTION A: [20] P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 7 Paper 1 GRADE 10 SECTION B QUESTION 2 Water waves crash against a seawall around the harbour. Six waves hit the seawall in 4 s. The distance between successive troughs is 10 m. The height of the waveform trough to crest is 2.5 m. 2.1 Identify the type of wave shown above. (1) 2.2 Explain how the wave, mentioned as answer to Question 2.1, is propagated. (2) 2.3 How many completed waves are indicated in the sketch? (1) 2.4 Write down the letters which indicate any TWO points that ... 2.4.1 are in phase. (2) 2.4.2 are out of phase. (2) 2.4.3 represent one wavelength. (1) 2.5 Calculate the amplitude of the wave. (2) 2.6 Show that the period of the wave is 0.67 s. (2) 2.7 Calculate the frequency of the waves. (2) 2.8 Calculate the speed of the waves. (3) [18] P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 8 Paper 1 GRADE 10 QUESTION 3 Electromagnetic radiation refers to waves of a dual nature, which are known as the wave nature and the particle nature. Particles are referred to as photons. Electromagnetic radiation may include the following: x-rays, visible light, infrared, gamma rays, ultraviolet light, radio waves 3.1 Define the term photon. (2) 3.2 Explain how electromagnetic radiation is propagated. (3) 3.3 From the list above, state which of the following forms of radiation ... 3.3.1 is used in hospitals to sterilize medical instruments. (1) 3.3.2 is used in a television remote control. (1) 3.3.3 has a high penetrating ability. (1) 3.3.4 has the longest wavelength. (1) 3.4 Ultrasound allows gynaecologists to examine babies in their mothers’ wombs to ensure that problems are detected early. 3.4.1 Briefly explain why gynaecologists examine babies in their mothers’ womb using ultrasound, not x-rays. (2) 3.4.2 An X-ray photon incident on a body has a wavelength of 3,1 x 10-9 m. Calculate how much energy the photon imparts to the body. (3) [14] P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 9 Paper 1 GRADE 10 QUESTION 4 4.1 Write down the definition of a magnetic field. (2) 4.2 Name TWO ferromagnetic substances. (2) 4.3 A bar magnet as shown below is broken in half, resulting in two magnets X and Y. Redraw X and Y, clearly indicating poles on X and Y and the resultant magnetic field pattern. S N X Y (4) 4.4 What will be the influence (INCREASES, DECREASES or REMAINS THE SAME) on the magnetic field exerted between X and Y if ... 4.4.1 the poles of X and Y are reversed and X and Y are placed at the same distance apart? (2) 4.4.2 X and Y are moved further apart? (2) [12] P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 10 Paper 1 GRADE 10 QUESTION 5 Two insulated X and Y graphite-coated polystyrene spheres are kept stationary on an insulated surface a small distance apart. The charges on the spheres are – 5 nC and + 2 nC; respectively. When the spheres are released they move towards each other. X (-5nC) Y (+2nC) Insulated surface 5.1 State the Law of Conservation of Charge. (2) 5.2 Give a reason why the spheres move towards each other when they are released. (2) The two spheres are released and then allowed to touch. 5.3 Calculate the charge on each sphere after they touch. (3) 5.4 Were electrons transferred FROM X to Y or FROM Y to X? Give a reason for your answer. (3) 5.5 State what effect of each of the following changes will have of the magnitude of the electrostatic force. Write down only INCREASE, DECREASE or REMAIN THE SAME. 5.5.1 Increase the magnitude of the charges. (2) 5.5.2 Bring the charges closer to each other. (2) [14] P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 11 Paper 1 GRADE 10 QUESTION 6 Learners conduct an experiment to determine that if the effective resistance is greater when resistors are connected as potential dividers than when they are connected in parallel. They are provided with two resistors, an ammeter, 3 cells with emf of 1,5 V each, a voltmeter connected across the battery and both resistors and conductors. (Ignore the internal resistance of the battery.) 6.1 Write down a suitable aim for this experiment. (2) 6.2 Draw the circuit diagram for the experiment using the given apparatus. (5) 6.3 The results of the experiment are tabulated below. Ammeter Total Potential Potential Total readings Resistance Resistance Resistance difference difference Potential (A) of Resistor of Resistor of the across R1 across R2 Difference R1 (Ω) R2 (Ω) circuit V1 (V) V2 (V) VT(V) Experiment 1 0,75 3 3 A 2,25 C 4,5 Experiment 0,96 3 1,7 B D 1,63 4,5 2 6.3.1 Calculate the total resistance A and B. (4) 6.3.2 Calculate the potential difference values for C and D. (3) 6.3.3 Determine if resistors in series are potential dividers. (5) 6.4 If the resistors mentioned in the table are connected in parallel how would this affect the total current in the circuit? Justify your answer. (3) [22] TOTAL SECTION B: 80 TOTAL: 100 END

Downloaded from hlayiso.com PHYSICAL SCIENCES 12 Paper 1 GRADE 10 DATA FOR PHYSICAL SCIENCES GRADE 10 PAPER 1 (PHYSICS) TABLE 1: PHYSICAL CONSTANTS/TABEL 1: FISIESE KONSTANTES NAME / NAAM SYMBOL / SIMBOOL VALUE / WAARDE Acceleration due to gravity g 9,8 m·s-2 Swaartekragversnelling Speed of light in a vacuum c 3,0 x 108 m·s-1 Spoed van lig in 'n vakuum Planck's constant h 6,63 x 10-34 J·s Planck se konstante Charge on electron e -1,6 x 10-19 C Lading op elektron Electron mass me 9,11 x 10-31 kg Elektronmassa TABLE 2: FORMULAE / TABEL 2: FORMULES MOTION / BEWEGING v f  v i  a t x  v i t  21 at 2  v  vi  v f  v i  2ax 2 2 Δx   f Δt  2  WORK, ENERGY AND POWER / ARBEID, ENERGIE EN DRYWING U  mgh or/of EP  mgh 1 1 K mv 2 or/of E k  mv2 2 2 WAVES, SOUND AND LIGHT / GOLWE, KLANK EN LIG vf 1 T  f c E = hf or/of E = h λ ELECTRIC CIRCUITS / ELEKTRIESE STROOMBANE Q  I t R s  R1  R 2  ... W V q