Gr 10 Physical Sciences P1 (English) 2023 Possible Answers_hlayiso.com_.pdf

Downloaded from hlayiso.com PROVINCIAL EXAMINATION NOVEMBER 2023 GRADE 10 MARKING GUIDELINES PHYSICAL SCIENCES: PHYSICS (PAPER 1) 5 pages

Downloaded from hlayiso.com PHYSICAL SCIENCES: PHYSICS MARKING GUIDELINES (PAPER 1) GRADE 10 QUESTION 1 1.1 B ✓✓ (2) 1.2 A ✓✓ (2) 1.3 C ✓✓ (2) 1.4 C ✓✓ (2) 1.5 D ✓✓ (2) 1.6 B ✓✓ (2) 1.7 D ✓✓ (2) [14] QUESTION 2 2.1 A transverse wave is a wave in which the particles of the medium vibrate at right angles to the direction of the motion of the wave. ✓✓ (2) 2.2 2.2.1 A and C ✓ (1) 2.2.2 Trough ✓ (1) 2.2.3 Crest ✓ (1) 2.3 2.3.1 Amplitude = 0,5(20) ✓ = 10 cm ✓ = 0,1 m ✓ (3) 2.3.2 Wavelength = ½ (4) ✓ =2m✓ (2) 2.4 2.4.1 T = 1/f ✓ = 1/1,5 ✓ = 0,67 s ✓ (3) 2.4.2 v = f.‫✓ גּ‬ = (1,5)(2) ✓ = 3 ms–1 ✓ (3) [16] 2

Downloaded from hlayiso.com PHYSICAL SCIENCES: PHYSICS MARKING GUIDELINES (PAPER 1) GRADE 10 QUESTION 3 3.1 Originates from accelerating electric charge/propagate as electric and magnetic fields that are perpendicular to each other. ✓ (1) 3.2 Microwave ✓ Infrared ✓ and Visible radiation ✓ (3) 3.3 3.3.1 E = h c ✓ 3 x 108 E = 6,63 x 10–34 ✓ ✓ 700 x 10−9 E = 2,84 x 10–19 J ✓ (4) 3.3.2 E = hf ✓ 2,84 x 10–19 = 6,63 x 10–34 f ✓ f = 4,29 x 1014 Hz ✓ (3) [11] , QUESTION 4 4.1 A single vector that produces the same effect as is produced by a number of vectors collectively. ✓✓ (2) 4.2 F net = F 1 + F 2 ✓ Fnet = 5 + (–2) ✓ Fnet = 3 N regs ✓✓ (magnitude and direction) (4) [6] QUESTION 5 5.1 5.1.1 10 ms–1 ✓ (1) 5.1.2 The object moves at constant velocity ✓ of 10 ms–1 east. ✓ (2) 5.1.3 y 2 − y1 a= x 2 − x1 ✓ − 10 ✓ a = −10 7− 3 ✓ a = –5 ms–2 a = 5 ms–2 ✓ west ✓ (size and direction) (4) 5.2 5.2.1 200 m – 200 m = 0 m ✓ (1) 5.2.2 Average speed is the total distance travelled by an object per total time. ✓✓ Average velocity is the rate of the change in position or displacement divided by the time intervals in which displacement occurs.✓✓ (4) 3

Downloaded from hlayiso.com PHYSICAL SCIENCES: PHYSICS MARKING GUIDELINES (PAPER 1) GRADE 10 5.2.3 Vspeed = xt = 400 ✓ 240 ✓ = 1,67 ms–1 ✓ (3) [15] QUESTION 6 6.1 The principle of conservation of charge states that the net charge of an isolated system remains constant during any physical process.✓✓ (2) 6.2 A ✓ Electrons move from the negative sphere to the positive sphere. ✓ or B has excess number of electrons or A has deficiet number of electrons. (2) 6.3 6.3.1 Qnet = Q1 + Q2 ✓ = + 5 x 10–9 +(–2 x 10-9) ✓ = + 3 x 10–9 C ✓ (2 6.3.2 Q1 + Q2 Q= 2 ✓ −9 ) +( −2 x 10−9 ) (5 x 10 = 2 ✓ = + 1,5 x 10-9 C ✓ (3) 6.3.3 Q = n qe ✓ or n = Qe ✓ 3,5 x 10-9 ✓ = n x 1,6 x 10-19 ✓ 3,5 x 10−9 = ✓ 1,6 x 10−19 n = 2,19 x 1010 electrons ✓ = 2,19 x 1010 electrons ✓ (4) [13] QUESTION 7 7.1 Work done per unit charge by the battery. ✓✓ (2) 7.2 1,5 x 4 = 6 V ✓✓ (2) 7.3 7.3.1 1 = R11 + R12 ✓ Rp 1 Rp = 13 + 16 ✓ Rp = 2  RT = Rs + Rp RT = 8 + 2 ✓ Rt = 10  ✓ (4) 4

Downloaded from hlayiso.com PHYSICAL SCIENCES: PHYSICS MARKING GUIDELINES (PAPER 1) GRADE 10 7.3.2 Positive marking from 7,2. VTotal = V2 + V3 ✓ 6 = V2 + 4,8 ✓ V2 = 1,2 V ✓ (3) 7.3.3 Q = I t ✓ Q = (0,6)(20) ✓ Q = 12 C ✓ (3) 7.4 DECREASES ✓ The total effective resistance of the circuit increases. ✓ (2) [16] QUESTION 8 8.1 Kinetic energy is the energy an object possesses as a result of its motion. ✓✓ (2) 8.2 Ek = ½ mv2 ✓ = ½ (0,18) x (30)2 ✓✓ = 81 J ✓ (4) 8.3 EK = ½ mv2 162 ✓ = ½ (0,18).v2 ✓ v = 42,43 m∙s–1 ✓ (3) [9] TOTAL: 100 5