Physical Sciences Grade 12 North West Mock 2020 Memo

TOU ED I UM 03030000 ~ education Lefapha la Thuto la Bokone Bophirima Noordwes Depariement van Onderwys North West Department of Education ~ NORTH WEST PROVINCE NATIONAL SENIOR CERTIFICATE/ NASIONALE SENIOR SERTIFIKAAT GRADE/GRAAD 12 PRS ESRSSSSR SS ESSE SSER SSSR SES RS ESSER Sy Ht PHYSICAL SCIENCES: PHYSICS (P1)/ : u FISIESE WETENSKAPPE: FISIKA (V1) a " a " SEPTEMBER 2020 0 a i MARKING GUIDELINES/NAS/IENRIGLYNE x “es BSS SSS SSE T eS ese ees eeeee SSS 288588888 2” MARKS/PUNTE: 150 These marking guidelines consist of 7 pages and a cognitive grid of 2 pages/ Hierdie nasienriglyne bestaan uit 7 bladsye en ‘n kognitiewe tabel van 2 Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief | bladsye

Physical Sciences ogwnloaded fr om hlayisa,¢o! ember 2020 NSC/NSS — Marking Guidelines/Nasienrigiyne QUESTION 1/VRAAG 1 (2) (2) (2) (2) (2) (2) (2) (2) (2) (2) [20] QUESTION 2/ VRAAG 2 Mctto Litig IS $ Igh oon Funpo von weioiclehes in mementuny - 2.1 Ifa net (resultant) force acts on arvobject, the object will accelerate in the direction of the net force. The acceleration is directly proportional to the net force and inversely proportional to the mass of the object/Wanneer fh netto (resulterende) krag op in voorwerp inwerk sal die vorrwerp versnel in die rigting van die krag. Die versnelling is direk eweredig aan die krag en omgekeerd eweredig aan die massa.“ v (2) A 4 T BY. t t i Mw 6) 2.3 Fy=mg w =(4+2)08v =588N vo (3) 24 fe=peN M = 0,3°58,8 = 17,64 N ¢ (3) 2.5 3kg 6 kg Fret = mav Fret = ma W-T=mea T-f=mea 29.4-TY =3av 1 T-17,64=6:av ....2 142 29,4 — 17,64 = Qeav’ a=1,31 mstv (6) [19] Copyright reserved/Kopiereg voorbehou

Physicel scien Own! paded ah rom h layiso. COMsertember 2020 NSC/NSS — Marking Guidelines/Nasienriglyne QUESTION 3/VRAAG 3 3.1 No/Nee. Constant velocity/Konstante snelheid: AFa=w BFa=wesin® v (3) 3.2.1 W=FgreAX « cos © = megesin 6 * AX * cos 0° ¥ = 1250: (9,8) ¥ + (2) 18-1 ¥ = 110250 Jv (4) Wo _ 110250 ¥; 3.22 Perv =v = 3062,5W (3) 3.3. The total mechanical energy (sum of gravitational potential energy and kinetic energy) in an isolated system remains constant/Die totale meganiese energie (som van die gravitasie potensiele energie en kinetiese energie) in in geslote sisteem bly konstant. “ (2) 3.4. Emtop = Em bottom. mgh + % mv? = mgh + % mv? 1250(9,8)(9) + 0 = 0+ % (1250) v?v v= 176,4 v= 13,28 mest (3) [15] QUESTION 4/VRAAG 4 4.1. An object moving under the force of gravity only/n Voorwerp wat slegs onder die invioed van gravitasiekrag beweeg.” v (2) 42, v=%=49=22 Vv mt=4178 At At Ay = vie At + ; eat? ¥ =040,5°9,8°4,172 ¥ = 85,07 - 85,21 mv (Range: 85,07 - 85,21) (4) 4.3. The product of the resultant/net force acting on an object and the time the resultant/net force acts on the object. “ v /Die produk van die netto krag en die tyd wat die krag op die voorwerp inwerk. “ (2) Copyright reserved/Kopiereg voorbehou

Physical Sciences oh Qwsnls al ded fr om HlayisQ,GO'Mverc020 NSC/NVSS — Marking Guidelines/Nasienriglyne 44. weavitadt v = 0+9,84,17 v = 40,87 mst FretAt = mAv = m(vr— vi) Fnet?1,2 “ = 90(0 - 40,87) v Fhet= - 3065,25 N Fret= 3065,25 NV (Range: 3065,25 — 3065,95) (6) A yf 45. Frt= Pv Ap remains constant/bly konstant At increase hence the force decreases or Force is indirectly proportional to time.“ /At verleng, dus sal die krag verminder of die krag is omgerkeerd eweredig aan die tyd. . (3) [17] QUESTION S/VRAAG 5 5.1. Observed change in frequency when the observer and source move relative to each other/ waarneembare verandering in frekwensie wanneer waarnemer en bron relatief tot mekaar beweeg.v (2) 5.2 800Hzv (1) _VFV pf 63 hess 950V = (=) ¥ B00¥ V = 53,68 mest v7 (5) 5.4 Velocity (vs) mes _y 800 N a 3 i<j Qo = fom 2 (3) [11] Copyright reserved/Kopiereg voorbehou

Physical scienod unloaded Bi ro m h lay so i COM eptember 2020 NSC/AVSS — Marking Guidelines/Nasienriglyne QUESTION 6/VRAAG 6 6.1. Force between two point charges are directly proportional to the product of the charges and inversely proportional to the square distance between them/Die krag tussen twee puntladings is direk eweredig aan die produk van die ladings en omgekeerd eweredig aan die kwadraat van die afstand tussen hulle. ¥ ¥ (2) 2 f 62 Fx= a f Note: Mark direction independently./merk rigting onafhanklik. Fy= ay 2h ee ary eo Answer only/slegs antwoord 1/4 Fy= FV To the righty” (4) 6.3 Fret=Fe+ Fy =F - iad =F v To thesighty (3) [9] QUESTION 7/VRAAG 7 7.1. The direction of the electric field at a point is the direction that a positive test charge would move if placed at that point.“ (2) cf 7.2 4 + (3) v nm As ss = 3x107C SS kG, _9xt0%(1e107F) 7 € =AG =r Ue) = tx t07e Enet = Qi + Q2 = 3x107 + 1x10’ = 4x 107 NeC" v to the right’ 6) [11] Copyright reserved/Kopiereg voorbehou

Physical Sciences pmowalaaded fr om hlayis9,¢o! ber 2020 NSC/NSS ~ Marking Guidelines/Nasienriglyne QUESTION 8/VRAAG 8 8.1 Aconductor that obeys Ohm’s law or the resistance of the conductor remains constant./’n Geleier wat Ohm se wette gehoorsaam of Die weerstand van die geleier bly konstant. (1) Sarl be ag ee R= TS (3) 83 Istv =e v = 1,04 Ay (3) 8.4 844 Var = 12 Vw (1) els@ay Nace IR = 22.20% = / 8.4.2 [Se Ssh “Vacs IR = = 20¥ = 4,80Vv Orlof (Ratios: Vv x 12¥ =4,8Vv’) (3) 8.4.3 Veo = IR = 2-10 Vv =8 V Veo = Ven -Vac¥ =8-4,8 ¥ =3,2V/ (4) 8.5 STAY THE SAMEY . Parallel circuit, the reading across branches are the same, 12 V. “ Change in resistance will affect the current or no internal resistance. “ /BLY DIESELFDE. Paralelle stroombaan, die lesing vir alle vertakkings bly 12 V, Verandering in weerstand sal die stroom beinvioed of geen interne weerstand. (3) 8.6 empty Rp =20 «Rep =2+6=80 emi/femk = \(R +1) 1O=12M (B+nv 04=4,2r r=0,33 OW (4) [22] Copyright reserved/Kopiereg voorbehou

Physical Sciences ewinloaded from hlayisQu@QMhrer 2020 NSC/NSS — Marking Guidelines/Nasienriglyne QUESTION 9/VRAAG 9 9.1. The maximum potential difference value reached by the alternating current as it fluctuates i.e. the peak of the sine wave representing an AC potential difference. “ v [Die maksimum potensiaal verskil/ spanning bereik deur die verskille in die stroom as dit verander, bv. die piek van die sinusgolf ste! AC potesiaal voor. (2) 9.2 Vine = Mile v= v= 219,91 WW (3) 93 f= momma Hy 25 Hz , (2) — Vims /- 21992 af” . 94 Paz =k v= 12090,10WY (Range: 12090,10 - 12090,13) (3) 95 P=PRY 12090,10 = ?8v |= 38,87 Av (3) 9.6 Increases/Verhoog” The rate of change in magnetic flux increase’ , this increase the emf of the generator’ /Die tempo van verandering in manetiese flux verhoog, ait verhoog die emf van die generator. (3) [16] QUESTION 10/VRAAG 10 10.1 Photo electrons that has particle properties and wave properties v v [Foto- elektrone wat deeltjie eienskappe en golf eienskappe toon. (2) = hie 343x108 L 13 Jo 10.2 E=h;» 6,63 x 10% 1,99x 10% J (3) 10.3 E=WotEk ¥ 1,99 x 10°73 = 1,9 x 103“ + fo. x 10°) ve’ V=2,4x 108 m-st p=mv=9.11 x 10% 2,4 x 108% = 2,19 x 10% kgs m-st (5) [10] TOTALITOTAAL: 150 Copyright reserved/Kopiereg voorbehou