Physical Sciences Grade 10 P1 Gauteng November 2021 Memo

Downloaded from hlayiso.com PROVINCIAL EXAMINATION NOVEMBER 2021 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 QUESTION 1 1.1 A (2) 1.2 A (2) 1.3 A (2) 1.4 D (2) 1.5 B (2) 1.6 A (2) 1.7 C (2) 1.8 A (2) 1.9 B (2) 1.10 C (2) [20] TOTAL SECTION A: 20 2

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) MARKING GUIDELINES (Paper 1) GRADE 10 SECTION B QUESTION 2 2.1 The algebraic sum of two disturbances that occupy the same space at the same time. (2) 2.2 2.2.1 Wavelength (1) 2.2.2 Trough (1) 2.2.3 Crest (1) 2.2.4 Amplitude (1) 2.3 2.3.1 B and D (2) A and F 2.3.2 D and C C and F (2) 2.4 0,02 m (2) [12] 3

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) MARKING GUIDELINES (Paper 1) GRADE 10 QUESTION 3 3.1 Net charge of an isolated system remains constant during any physical process. ✓✓ (2) 3.2 Q = QP + QT ✓ = (–4 x 10-9) + (+6 x 10-9) ✓ = +2 x 10-9 C ✓ (3) 𝑄𝑝 + 𝑄𝑇 3.3.1 QNew = ✓ 2 −4 x 10−9 + 6 x 10−9 = ✓ 2 = +1 x 10-9 C ✓ (3) 3.3.2 Every charge in the universe consists of the integer multiple of the electron charge. ✓✓ (2) 3.3.3 Q = n.qe ✓ 2 x 10-9 = n.(16 x 10-19) ✓ ∴ n = 1.25 x 1010 electrons ✓ (3) 3.3.4 From P to T ✓ • Sphere P, has excess ✓ number of electrons ✓ OR • Sphere T, has deficit ✓number of electrons ✓ (3) [16] 4

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) MARKING GUIDELINES (Paper 1) GRADE 10 QUESTION 4 4.1 Voltage is the amount of work done per unit charge. ✓✓ OR Difference in electric potential between two points in a circuit. ✓✓ (2) 1 1 1 4.2 4.2.1 =𝑅 + 𝑅 ✓ 𝑅𝑃 1 2 1 1 1 = 24 + 8 ✓ 𝑅𝑃 ∴ 𝑅𝑃 = 6  𝑅𝑇𝑂𝑇 = 𝑅𝑆 + 𝑅𝑃 =2+6✓ =8✓ (4) 𝑄 4.2.2 I = ∆𝑡 ✓ 𝑄 4 = (2 x 60) ✓ ∴ 𝑄 = 480 C ✓ (3) 4.3 𝑉𝑇𝑂𝑇 = 𝑉2Ω + 𝑉𝑃 ✓ 24 = 6 + 𝑉𝑃 ✓ ∴ 𝑉𝑃 = 18 V ✓ (3) [12] QUESTION 5 5.1 Photon – A quantum of light/electromagnetic radiation with energy proportional to frequency. ✓✓ (2) 5.2 A– Microwave oven ✓ B– Visible light ✓ C– Ultraviolet light ✓ D– Gamma rays ✓ (4) 5.3 To examine for broken/fractured bones. (1) 5.4 Infrared – It has highest frequency ✓, thus greater energy. E  F ✓ from E = h.F (3) 5

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) MARKING GUIDELINES (Paper 1) GRADE 10 5.5 E = h.F = 6,63 x 10-10 x 3,2 x 1010 ✓ = 2,12 x 10–23 J ✓ (3) [13] QUESTION 6 6.1 Displacement is the change in position measured as the difference between final and initial points on a straight line. ✓✓ (2) 6.2 Moving at a constant velocity. – Same distance is covered in the same time. (2) 6.3 x = 33 – 12 ✓ = 21 m ✓, East. ✓ (3) 6.4 ∆𝑥 v = ∆𝑡 ✓ (33−21) = 7.5−6 ✓ = 8m.s-1 ✓ (3) [10] QUESTION 7 7.1 Energy that an object has as a result of its height/position above the surface of the earth. ✓✓ (2) 7.2 EMA = EP + EK ✓ = m.g.h + 0 = (45)(9,8)(0,2) ✓ + 0 ✓ = 88,2 J ✓ (4) 7.3 POSITIVE MARKING FROM 7.2 EMA = EMB ✓ 1 88,2 ✓ = 2 𝑚𝑣 2 + 0 ✓ 1 88,2 = 2 (45)𝑣 2 ✓ + 0 ✓ 88.2 ∴ v = √22.5 = 1,98 m.s-1 (5) 6

Downloaded from hlayiso.com PHYSICAL SCIENCES (PHYSICS) MARKING GUIDELINES (Paper 1) GRADE 10 7.4 Conservation of mechanical energy. Total mechanical energy of an isolated system ✓ remains constant or is conserved. ✓ (3) 7.5 20 Sin 25° = 𝐴𝐵 ✓ 20  AB = 𝑆𝑖𝑛25o ✓ = 47,32 cm ✓ or 0,4732 m ✓ (3) [17] TOTAL SECTION B: 80 TOTAL MARKS: 100 7