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

Downloaded from hlayiso.com PROVINCIAL EXAMINATION JUNE 2023 GRADE 10 MARKING GUIDELINES PHYSICAL SCIENCES (PHYSICS) (PAPER 1) 7 pages

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) MARKING GUIDELINES (PAPER 1) GRADE 10 SECTION A: MULTIPLE-CHOICE QUESTIONS QUESTION 1 1.1 D  (2) 1.2 B  (2) 1.3 C  (2) 1.4 A  (2) 1.5 B  (2) 1.6 A  (2) 1.7 D  (2) 1.8 A  (2) [16] 2

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) MARKING GUIDELINES (PAPER 1) GRADE 10 SECTION B: ELECTROSTATICS AND ELECTRICITY QUESTION 2 2.1 Added  (1) 2.2 Less than , negatively charged /has more electrons than protons/has less protons than electron.  (3) Q 2.3 n  e 1013   1,6 Q1019  Q = –1,6  10–6 C Qnew = –1,6  10–6 + (–4  10–9) Qnew = –1,604  10–6 C  (4) [8] QUESTION 3 3.1 Principle of conservation of charge: The net charge of an isolated system remains constant during any physical process.  (2) 3.2 Electrons move from C to B,  until they are evenly distributed.  The negative charges from B repel away towards the left while the positive charges migrate towards the right to attract the negative charges from C that have migrated towards the left and the positive charges from C migrate towards the left.  Sphere B is attracted to sphere C because unlike charges attract one another. (3) 3.3 Q n  e  4  10 6  6  10 6  n 1,6  10 19  n = 1,25 1013  (4) [9] 3

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) MARKING GUIDELINES (PAPER 1) GRADE 10 QUESTION 4 4.1 What is the relationship between current and potential difference at constant temperature?  (Accept any other relevant answer.) (2) 4.2 Current  (2) 4.3 Temperature/Resistance  (1) 4.4 Current vs Voltage 4 3,5 3 2,5 Current (A) 2 1,5 1 0,5 0 1,5 3,0 4,5 6,0 7,5 Voltage (V) Criteria Mark Allocation Heading/Caption (1) Label (y-axis) (1) Label (x-axis) (1) Two points plotted correctly (1) Three or more points plotted correctly (2) Line of best fit (1) (7) 4.5 Current increases as potential differences increase./Current is directly proportional to potential difference.  (2) [14] 4

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) MARKING GUIDELINES (PAPER 1) GRADE 10 QUESTION 5 5.1 1 1 1 = +  RP R1 R 2 1 1 1 = + RP 4 5 RP = 2,22   (2) 5.2 V I  R 4,5 I  2,22 I = 2,03 A  (3) 5.3 V I R 4,5 I  4 I = 1,13 A Q 1,13   10 Q = 11,30 C  (3) 5.4 DECREASES  Adding a resistor in series decreases the total current of the circuit thus effective resistance increases./Resistance and current are inversely proportional, thus increasing total resistance decreases the total current of the circuit.  (3) [11] 5

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) MARKING GUIDELINES (PAPER 1) GRADE 10 SECTION C: WAVES, SOUNDS AND LIGHTS QUESTION 6 6.1 The principle of superposition states that when two disturbances occupy the same space at the same time, the resulting disturbance is the sum of two disturbances.  (2) 6.2 (3) 6.3 D V   t 0,375   1,25 0,3 m·s–1  (4) [9] QUESTION 7 7.1 A transverse wave is a wave where the movement of the particles of the medium is perpendicular (at a right angle) to the direction of propagation of the wave.  (2) 7.2 3 – waves  (2) 7.3 1,6 cm or 0,016 m  (2) 7.4 0,21 T   3 = 0,07 s  (2) 6

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) MARKING GUIDELINES (PAPER 1) GRADE 10  7.5 V   V = F.  T 0,4 OR = 14,29   0,4    0,07 = 5,71 m·s–1  = 5,71 m·s–1  (4) [12] QUESTION 8 8.1 8.1.1 Electromagnetic radiation is a self-propagating wave in space with electric and magnetic components.  (2) 8.1.2 gamma rays  > X-ray  > ultraviolet light > visible light  > infra-red  (5) 8.1.3 These rays have a higher frequency(energy) thus a higher degree of penetration.  (2) 8.2 8.2.1 X-rays – They are used to produce photographs of the internal organs such as bones.  (1) 8.2.2 Microwaves – They can be used to heat/cook up food.  (1) 8.3 c=f 3  108 = 2,1  108    = 1,43 m  (4) [15] QUESTION 9 9.1 A photon is a quantum (energy packet) of light.  (2) 9.2 hc E   λ (6,63  10 34 )(3  10 8 ) E   1,3  10 6 E  1,53  10 19 J  (4) [6] TOTAL: 100 7