# Physical Sciences Grade 12 P1 Gauteng June 2025 Memo (Afr)

> Grade 12 Physical Sciences Paper 1 memorandum from the Gauteng June Exam 2025 (Afrikaans), 15 pages. Read online or download the free PDF.

- Page: https://www.hlayiso.com/library/physical-sciences-p1-english-and-afrikaans-june-2025-possible-answers/7d094f7e-5818-4c68-af3e-99d040e59043
- Updated: 2026-09-27
- Subject: Physical Sciences
- Grade: Grade 12
- Language: Afrikaans
- Document type: Memorandum
- Year: 2025
- Exam period: Gauteng June Exam
- Paper: 1
- Curriculum: CAPS
- Pages: 15

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## About this document

Physical Sciences · Grade 12 · Gauteng June Exam · 2025 · Afrikaans. Memorandum, 15 pages. Read online or download the PDF.

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### Page 1

JUNE EXAMINATION
                    JUNIE EKSAMEN

                   GRADE/GRAAD 12

                           2025
               MARKING GUIDELINES/
                 NASIENRIGLYNE

                     PHYSICAL SCIENCES/
                    FISIESE WETENSKAPPE

                     (PAPER/VRAESTEL 1)

15 pages/bladsye

### Page 2

PHYSICAL SCIENCES: PHYSICS
                     MARKING GUIDELINES
                                          FISIESE WETENSKAPPE: FISIKA
                     NASIENRIGLYNE
                                          (PAPER/VRAESTEL 1)    GR12 0625

QUESTION 1/VRAAG 1

1.1    C                                                             (2)

1.2    D                                                             (2)

1.3    B                                                             (2)

1.4    A                                                             (2)

1.5    C                                                             (2)

1.6    A                                                             (2)

1.7    B                                                             (2)

1.8    D                                                             (2)
1.9    C                                                             (2)

1.10   C                                                             (2)
                                                                      [20]

                                    2

### Page 3

PHYSICAL SCIENCES: PHYSICS
                        MARKING GUIDELINES
                                                     FISIESE WETENSKAPPE: FISIKA
                        NASIENRIGLYNE
                                                     (PAPER/VRAESTEL 1)    GR12 0625

QUESTION 2/VRAAG 2

 2.1   The force that opposes the motion of a moving object relative to a surface. 
       (2 or zero)
       Die krag wat die beweging van 'n bewegende voorwerp relatief tot 'n oppervlak
       teenwerk. (2 of nul)                                                             (2)

 2.2

                                                     No components
                                                     are accepted

                Accepted labels/Aanvaarde byskrifte              Marks/Punte

               Fg/Fw/weight/mg/gravitational force
               Do not accept gravity.
         w                                                             
               Fg/Fw/gewig/gravitasiekrag
               Moet nie gravitasie aanvaar nie.

               FT/tension
         T                                                             
               FT/spanning/spankrag

               Normal (force)/Fnormal
         FN                                                            
               Normaal (krag)/Fnormaal

               Fk/Ff/Friction
         f                                                             
               Fk/Ff/Wrywing

               Deduct 1 mark for any additional force.
               Mark is given for both arrow and label. If
               everything is correct, but no arrows, deduct
               a mark.
               Trek 1 punt af vir enige addisionele kragte.
               Punt word toegeken vir pyltjie en byskrif.
               Indien alles korrek, maar geen pyltjies, trek
               1 punt af                                                                (4)

                                              3

### Page 4

PHYSICAL SCIENCES: PHYSICS
                        MARKING GUIDELINES
                                                     FISIESE WETENSKAPPE: FISIKA
                        NASIENRIGLYNE
                                                     (PAPER/VRAESTEL 1)    GR12 0625

2.3   Marking criteria/Nasienkriteria
        • Any one of the correct formulae/enige een van die korrekte formules 
        • Fx substitution/Fx invervanging 
        • Fy substitution/Fy invervanging 
        • Substitution for 0 or equating equation 1 and 2/Invervanging van 0 of
            gelykstel van vergelykings 1 en 2 
        • Final answer /Finale antwoord (Range/Gebied 37,59 N – 37,77 N)

        OPTION 1/OPSIE 1:
        Fnet = ma
        Fnet = 0                             Any one/Enige een
        Tcos θ – fk = ma
        Tcos 40o – µkN = ma
        Tcos 40o – (0,31)(Fg – Tsin40o)  = 0 
        T cos 40o – (0,31)((12 x 9,8) – Tsin40o) =0
        T = 37,77 N 

      OPTION 2/OPSIE 2:

      fk= µkN 

      Tcos 40o = 0,31FN
         (0,31FN )
      T=             ....... equation 1/vergelyking1
          cos 40o

      Fy = Fg - FN

      Tsin 40o = (12x9,8) - FN
             117,6−FN
      T=                  …… equation 2/vergelyking 2
               sin 40𝑜𝑜

      (0,31FN )         117,6−FN
                  =                  (equating the two equations/gelykstelling van die
       cos 40𝑜𝑜            sin 40𝑜𝑜
                                      twee vergelykings)

      117,6 - FN = 0,839 (0,31FN)

      FN = 93,32 N

           (0,31)(93,32)
      T=
              cos 40o

      T = 37,77 N 
                                                                                          (5)

                                              4

### Page 5

PHYSICAL SCIENCES: PHYSICS
                          MARKING GUIDELINES
                                                      FISIESE WETENSKAPPE: FISIKA
                          NASIENRIGLYNE
                                                      (PAPER/VRAESTEL 1)    GR12 0625

 2.4
 2.4.1   OPTION 1/OPSIE 1:
               v + vf 
         Δx =  i       Δt 
               2 

                (10)+(10)
         24 =                ( ∆ t) 
                    2

         ∆ t = 2,4 s 

         OPTION 2/OPSIE 2:
         Δx = v i Δt + 21 a∆t 2         Accept/Aanvaar       Δx = vΔt
                         1
         24 = (10) ∆ t + 2 (0) ∆ t2 
         ∆ t = 2,4 s                                                                         (3)

 2.4.2   REMAINS THE SAME/BLY DIESELFDE                                                      (1)

 2.5.1   DECREASE/VERLAAG                                                                    (1)

 2.5.2   As θ increases, the Fy will increase/Soos θ toeneem, sal die Fy toeneem 
         FN = Fg – Fy / N α f / normal force decreases / normaalkrag verminder
         and μk is constant/en μk is konstant                                                (3)
                                                                                             [19]

QUESTION 3/VRAAG 3

  3.1    Each body in the universe attracts every other body with a force that is directly
         proportional to the product of their masses and inversely proportional to the
         square of the distance between their centres. ✓✓

         Elke liggaam in die heelal trek elke ander liggaam aan met ’n krag direk
         eweredig aan die produk van hul massas en omgekeerd eweredig aan die
         kwadraat van die afstand tussen hul middelpunte.                                     (2)

                                               5

### Page 6

PHYSICAL SCIENCES: PHYSICS
                                MARKING GUIDELINES
                                                          FISIESE WETENSKAPPE: FISIKA
                                NASIENRIGLYNE
                                                          (PAPER/VRAESTEL 1)    GR12 0625

   3.2
   3.2.1   OPTION 1/ OPSIE 1                           OPTION 2/ OPSIE 2
           Fg = mg                                          m m2
           w = ma                                      F = G 12
                                                             r
           5,38 x 106 = m(9,8)                                       �6,67𝑥𝑥10−11 ��5,98𝑥𝑥1024 �(m)
                                                       5,38 x 106 =                                    
           m = 548 979,59 kg (5,49 x 105 kg)                                  (6,38𝑥𝑥106 )2
                                                       m = 548 979,59 kg (5,49 x 105 kg)
                                                                                                            (2)

   3.2.2         m 1m 2
           F=G              
                   r2
                         �6,67𝑥𝑥10−11 ��5,98𝑥𝑥1024 �(m)                    
                        6
           5,04 x 10  =
                              (9 000+6,38𝑥𝑥106 )2                          

           m = 515 785,7 kg         (5,16 x 105 kg)                                                        (5)

   3.2.3   POSITIVE MARKING FROM 3.2.1 AND 3.2.2/POSITIEWE NASIEN VANAF
           3.2.1 en 3.2.2
                  Fuel mass = Total mass – mass of rocket (at 9000m)
           Brandstofmassa = Totale massa – massa van vuurpyl (op 9000m)
                            = 548 979,59 – 515 785,70 
                           = 33 193,89 kg  (3,32 x 104 kg)
           range/gebied 33 000 – 33 193,89                                                                  (2)

   3.3     INCREASE/VERHOOG                                                                               (2)
                                                                                                           [13]
QUESTION 4/VRAAG 4
 4.1    The block B/die blok B
        Only gravitational force is acting on the block./Slegs gravitasiekrag werk op
        die blok in.                                                                                       (2)
 4.2.1  Take down as negative/Neem af as         Take down as positive/Neem af as
        negatief:                                positief:
           vf = vi + aΔt                              vf = vi + aΔt 
           0 = 5 + (−9,8)Δt                           0 = −5 + (9,8)Δt 
           Δt = 0,51 s                                Δt = 0,51 s   
                                                                                                            (3)
 4.2.2     Take down as negative/Neem af as            Take down as positive/Neem af as
           negatief:                                   positief:
           vf2 = vi2 + 2aΔx                           vf2 = vi2 + 2aΔx 
               = 52 + 2(−9,8)(−50)                        = (−5)2 + 2(9,8)(50) 
           vf = 31,7 m.s-1 (downwards)                vf = 31,7 m.s-1 (downwards) 
                                                                                                            (3)

                                                  6

### Page 7

PHYSICAL SCIENCES: PHYSICS
                       MARKING GUIDELINES
                                                   FISIESE WETENSKAPPE: FISIKA
                       NASIENRIGLYNE
                                                   (PAPER/VRAESTEL 1)    GR12 0625

4.2.3   POSITIVE MARKING FROM 4.2.1 AND 4.2.2/
        POSITIEWE NASIEN VANAF 4.2.1 EN 4.2.2
        OPTION 1/OPSIE 1:                OPTION 1/OPSIE 1:
        Take down as negative/Neem af as Take down as positive/Neem af as
        negatief:                        positief:
                           1                                     1
        Δy = vi Δt + aΔt 2                    Δy = vi Δt + aΔt 2 
                           2                                     2
                       1       2                             1
        −50 = 5Δt + 2 (−9,8)Δt                50 = −5Δt + 2 (9,8)Δt 2 
        Δt = 3,745 s                          Δt = 3,745 s 

        OPTION 2/OPSIE 2:                      OPTION 2/OPSIE 2:
        Take down as negative/Neem af as       Take down as positive/Neem af as
        negatief:                              positief:
                           1                                     1
        Δy = vi Δt + aΔt 2                    Δy = vi Δt + aΔt 2 
                           2                                     2
                   1                                     1
        −50 = 0 + 2 (−9,8)Δt 2                50 = 0 + 2 (9,8)Δt 2 
                     Δt = 3,19 s                             Δt = 3,19 s
        t = 3,19 + 0,51                         T = 3,19 + 0,51
          = 3,7 s                                = 3,7 s 

        OPTION 3/OPSIE 3:                      OPTION 3/OPSIE 3:
        Take down as negative/Neem af as       Take down as positive/Neem af as
        negatief:                              positief:
            vf = vi + aΔt                         vf = vi + aΔt 
        −31,70 = 5 + (−9,8)Δt                 31,70 = 5 + (9,8)Δt 
            Δt = 3,745 s                          Δt = 3,745 s                   (3)
4.3     POSITIVE MARKING FROM 4.2/POSITIEWE NASIEN VANAF 4.2
        Marking criteria/Nasienriglyne:
         initial height/aanvanklike hoogte (50 m)
         time at maximum height/tyd by maksimum hoogte (4.2.1)
         time reaching the ground/tyd om grond te bereik (4.2.3)
         ground as zero reference point/grond as nulverwysingspunt
         correct shape of graph/korrekte vorm van grafiek
        Take down as negative/Neem af as       Take down as positive/Neem af as
        negatief:                              positief:

                                               -

                                                                                   (5)
                                                                                  [16]

                                           7

### Page 8

PHYSICAL SCIENCES: PHYSICS
                           MARKING GUIDELINES
                                                             FISIESE WETENSKAPPE: FISIKA
                           NASIENRIGLYNE
                                                             (PAPER/VRAESTEL 1)    GR12 0625

QUESTION 5 /VRAAG 5

 5.1
 5.1.1   The TOTAL linear momentum of an isolated system remains constant (is
         conserved).  do not accept closed system (2 or zero)

         Die TOTALE lineêre momentum van ‘n geïsoleerde sisteem bly konstant
         (behoue).
         Moet nie geslote sisteem aanvaar nie. (2 of nul)                                           (2)

 5.2.1        p = mv
         30 000 = (2 000)v                                                                         (3)
              v = 15 m∙s-1  right/regs 

 5.2.2   POSITIVE MARKING FROM Q5.2.1 / POSTIEWE NASIEN VANAF V5.2.1
         OPTION 1/ OPSIE 1
                               Ʃ pi = Ʃ pf
             pi(car A) + pi( car B) = pf(car A) + pf(car B)  Any one/Enige een
         mvi(car A) + mvi( car B) = mvf(car A) + mvf(car B)
         (2 000)(15) + m(0) = (2 000)(5) + m(20)
                (30 000) + 0 = (10 000) + m(20) 
                                  m = 1 000 kg

         OPTION 2 / OPSIE 2
                                   ΔpA = - ΔpB                                      Any one/Enige een
                  mvi(car A) - mvf(car A) = - ( mvf(car B) - mvi( car B) )
         (2 000)(5) - (2 000)(15)  = -(m(20) - m(0)) 
                                       m = 1 000 kg
         If the negative in the formula is omitted (0/4)
         Indien die negatief in formule uitgelaat word (0/4)
                                                                                                    (4)

 5.3
              ∆ p= 20 000 kg∙m∙s-1 
                                                Arrow to the left/pyl na links 
                                                                                                    (2)
         (Do not penalise length of arrow/Moet nie lengte van pyltjie penaliseer nie)

                                                    8

### Page 9

PHYSICAL SCIENCES: PHYSICS
                       MARKING GUIDELINES
                                                         FISIESE WETENSKAPPE: FISIKA
                       NASIENRIGLYNE
                                                         (PAPER/VRAESTEL 1)    GR12 0625

 5.4    OPTION 1/ OPSIE 1                             OPTION 2/ OPSIE 2
        FnetΔt = mΔv       Any one/                  FnetΔt = mΔv             Any one/
        FnetΔt = Δp       Enige een                   FnetΔt = Δp             Enige een

        Fnet(0,5) = 2000(5 – 15)                     Fnet(0,5) = 1000(20 – 0) 
        OR / OF
        Fnet(0,5) = (10 000 – 30 000)                 Fnet(0,5) = 20 000
        Fnet = - 40 000
                                                      Fnet = 40 000 N 
        Fnet = 40 000 N 
                                                                                            (3)

 5.5    For the same change in momentum/Vir dieselfde verandering in
        momentum
        During impact, the airbag increases the contact time/Tydens impak verhoog
                                            1
        die lugsak die kontaktyd.  (Fnet α )
                                            t
        The net force will decrease./Die netto krag sal afneem.                            (3)
                                                                                           [17]

QUESTION 6/VRAAG 6

 6.1    A force for which the work done in moving an object between two points
        depends on the path taken.  (2 or zero)

        ‘n Krag waarvoor die arbeid verrig om ’n voorwerp tussen twee punte te laat
        beweeg, afhanklik is van die roete wat gevolg word. (2 of nul)                     (2)

 6.2    (Kinetic) frictional force  and pulling force / applied force 
        (Kinetiese) wrywingskrag en trekkrag / toegepaste krag.                            (2)

 6.3    OPTION 1/OPSIE 1
        Wnc = ΔEk + ΔEp                            Any one/Enige een
        WFA + Wfk = Ekf – Eki + 0

                                 1                1
        FΔxcosθ + fkΔxcosθ =         (20)vf2 -   (20)(0)2
                                 2                2

        (100)(4)cos0o + (65)(4)cos180o = 10vf2

        vf = 3,74 m∙s-1 

                                                  9

### Page 10

PHYSICAL SCIENCES: PHYSICS
                        MARKING GUIDELINES
                                                          FISIESE WETENSKAPPE: FISIKA
                        NASIENRIGLYNE
                                                          (PAPER/VRAESTEL 1)    GR12 0625

        OPTION 2/OPSIE 2
        Wnet = ΔEk
                                          Any one/Enige een
        WFA + Wfk = Ekf – Eki

                                  1            1
        FΔxcosθ + fkΔxcosθ =      (20)vf2 -        (20)(0)2
                                  2            2

        (100)(4)cos0o + (65)(4)cos180o = 10vf2

        vf = 3,74 m∙s-1                                                                      (5)

6.4     POSITIVE MARKING FROM 6.3/POSITIEWE NASIEN VANAF 6.3
        OPTION 1/ OPSIE 1             OPTION 2/OPSIE 2
        Pave = Fvave
                                                           𝑣𝑣 +𝑣𝑣
                                                     Δx= 𝑓𝑓2 𝑖𝑖 𝛥𝛥𝛥𝛥
                       3,74+0                              0+3,74
             =(100)(         )                      4=       2
                                                                     𝛥𝛥𝛥𝛥
                          2
             = 187 W                                Δt = 2,139s
                                                           W
                                                     P =
                                                           Δt                    Any one/
        (Range/Gebied 187 – 187, 08 W)                                           enige een
                                                            FΔx cosθ
                                                        =
                                                               Δt
                                                            (100)(4)cos0
                                                        =                   
                                                                    2,139

                                                         = 187 W 
                                                                                              (3)
6.5
6.5.1

                     Accept w / mg Aanvaar w / mg

                                                                                              (2)

6.5.2   No , The Fnet will be less (decrease) / the w will do negative work and
        remove energy from the system.

        Nee, die Fnet sal minder wees (afneem) / die gewig sal negatiewe arbeid
        verrig en die energie uit die sisteem verwyder.                                       (2)
                                                                                             [16]

                                               10

### Page 11

PHYSICAL SCIENCES: PHYSICS
                           MARKING GUIDELINES
                                                    FISIESE WETENSKAPPE: FISIKA
                           NASIENRIGLYNE
                                                    (PAPER/VRAESTEL 1)    GR12 0625

QUESTION 7/VRAAG 7

  7.1   Marking criteria/Nasienkriteria
        If any of the underlined key words/phrases in the correct context is omitted
        deduct
        1 mark./Indien enige van die onderstreepte sleutel woorde/frases in die
        korrekte konteks uitgelaat is, trek 1 punt af.
        The (apparent) change in frequency (or pitch) (of the sound) detected by a
        listener because the source and the listener have different velocities relative
        to the medium of propagation. 

        Die (skynbare) verandering in die frekwensie (of toonhoogte) (van die klank)
        waargeneem deur 'n luisteraar omdat die bron en die luisteraar verskillende
        snelhede relatief tot die voortplantingsmedium het.

        OR/OF
        An (apparent) change in observed/detected frequency/pitch as a result of
        the relative motion between a source and an observer/listener.

        'n (Skynbare) verandering in waargenome frekwensie/toonhoogte as gevolg
        van die relatiewe beweging tussen die bron en 'n waarnemer/luisteraar.
                                                                                          (2)

  7.2   Away/Weg van                                                                     (1)

  7.3   fL =
               v   ± vL
                           fS 
               v   ± vS                 do not accept any other formula/moet
        88  =
                     340
                              90      geen ander formule aanvaar nie
                   340+ vS

        vS = 7,73 m.s-1                                                                  (5)
                                                                                          [8]

                                            11

### Page 12

PHYSICAL SCIENCES: PHYSICS
                           MARKING GUIDELINES
                                                       FISIESE WETENSKAPPE: FISIKA
                           NASIENRIGLYNE
                                                       (PAPER/VRAESTEL 1)    GR12 0625

QUESTION 8/VRAAG 8

  8.1     Marking criteria/Nasienkriteria
          If any of the underlined key words/phrases in the correct context is omitted
          deduct
          1 mark./Indien enige van die onderstreepte sleutel woorde/frases in die
          korrekte konteks uitgelaat is, trek 1 punt af.
          The magnitude of the electrostatic force exerted by one point charge (Q1) on
          another point charge (Q2) is directly proportional to the product of the
          magnitudes of the charges and inversely proportional to the square of the
          distance (r) between them. 
          If masses in place of charge – zero marks

          Die grootte van die elektrostatiese krag wat een puntlading (Q1) op ‘n ander
          puntlading (Q2) uitoefen, is direk eweredig aan die produk van die groottes
          van die ladings en omgekeerd eweredig aan die kwadraat van die afstand (r)
          tussen hulle.
          Indien massa in plek van ladings – geen punte.                                   (2)

  8.2     Marking criteria/Nasienriglyne
          • correct formula for Coulomb’s Law/korrekte formule vir Coulomb se wet 
          • substitution of 0,866 in Fnet/vervanging van 0,866 in Fnet 
          • Substitution for C on A/vervanging vir C op A 
          • Substitution for B on A/vervanging vir B op A 
          • Correct final answer/Korrekte finale Antwoord 
           2      2       2
          Fnet = FConA + FBonA
           2        kQC QA 2     kQB QA 2
          Fnet =�          � +�         � 
                      r2           r2
                                                   2                                   2
                      9𝑥𝑥109 (7x10−6 )(5x10−6 )        9𝑥𝑥109 (5x10−6 )(2x10−6 )
          0,866  = �
               2
                                                �  + �                          � 
                                  d2                              0,52

          d = 0,63 m                                                                      (5)

  8.3
  8.3.1   Marking criteria/Nasienkriteria
          If any of the underlined key words/phrases in the correct context is omitted
          deduct
          1 mark./Indien enige van die onderstreepte sleutel woorde/frases in die
          korrekte konteks uitgelaat is, trek 1 punt af.
          The electric field at a point is the electrostatic force experienced per unit
          positive charge placed at that point. 

          Die elektriese veld by ‘n punt is die elektrostatiese krag wat per eenheid
          positiewe-lading wat by daardie punt geplaas is, ondervind word.                 (2)

                                              12

### Page 13

PHYSICAL SCIENCES: PHYSICS
                               MARKING GUIDELINES
                                                               FISIESE WETENSKAPPE: FISIKA
                               NASIENRIGLYNE
                                                               (PAPER/VRAESTEL 1)    GR12 0625

8.3.2                                                                           
                         EA                    EB
        OR/OF
                                EB

                                Enet                 EA
        OR/OF

         Enet
                                                                                             (2)

8.3.3   Marking criteria/Nasienriglyne
        • correct formula /korrekte formule 
        • substitution for both QA and QB/ vervanging van beide QA en QB 
        • Subtraction/aftrek 
        • Correct final answer/Korrekte finale Antwoord 
                    kQA        kQB
        Enet =        2
                        −              
                     r         r2
            9×109 (2×10−6 )              9×109 (5×10−6 )
        =                           −                     
                    0,22                      0,72

        = 358 163,27 N.C-1              OR 3,58 x 105 N.C-1                                 (4)

8.3.4   The statement is true 

        The net electric field will always be the sum of EB and EA. The two electric
        fields will always be in the same direction. 

        Die stelling is waar.

        Die netto elektriese veld sal altyd die som van EB en EA wees, die twee
        elektriese velde sal altyd in die selfde rigting wees.                               (2)

8.4.1   Directly proportional/direk eweredig.                                               (1)

8.4.2   OPTION 1/OPSIE 1                                   OPTION 2/OPSIE 2
                F                                                               ΔF
        E=                                                gradient/gradiënt = Δq 
                q
             0,005                                                       0,005 − 0
        =                                                         =                    
            1 x 10−6                                                   1,0 x 10−6 − 0

        = 5 000 N · C−1                                            = 5 000 N · C −1 

                                                                                             (3)
                                                                                            [21]

                                                      13

### Page 14

PHYSICAL SCIENCES: PHYSICS
                                    MARKING GUIDELINES
                                                            FISIESE WETENSKAPPE: FISIKA
                                    NASIENRIGLYNE
                                                            (PAPER/VRAESTEL 1)    GR12 0625

QUESTION 9/VRAAG 9

  9.1     The rate at which work is done  (2 or zero)

          Die tempo waarteen arbeid verrig word. (2 of 0)                                    (2)

  9.2.1   1,2 A                                                                            (2)

  9.2.2   OPTION 1/OPSIE 1:                            OPTION 3/OPSIE 3:

          P = VI                                      P = I2 R 
          P = 3,6(2,4)                                 = 2,42 (1,5) 
           = 8,64 W                                    = 8,64 W 

          OPTION 2/OPSIE 2:                            OPTION 4/OPSIE 4:

          1       1        1        1   1              𝑃𝑃𝑅𝑅2 = 𝐼𝐼 2 𝑅𝑅   
              =        +        = +
          R       R1       R2       3   3
          R = 1,5 Ω                                          = (1,2)2(3)      
                                                             = 4,32 W
                  V2
          P=                                            Ptotal = PR2 + PR3
                  R
                  3,62
              =                                               = 4,32 + 4,32
                  1,5
              = 8,64 W                                        = 8,64 W       
                                                                                             (3)

  9.3.1   OPTION 1/OPSIE 1:                            OPTION 2/OPSIE 2:
          W = I2 Rt                                           V2 t
                                                       W=                
              = 1,262 (3)(600)                                 R
                                                                3,782 (600)
                                                          =           
              = 2857,68 J                                      3
                                                          = 2857,68 J 
          OPTION 3/OPSIE 3:
          W = VIt              
              = 3,78(1,26)(600) 
              = 2857,68 J 
                                                                                             (3)

  9.3.2   DECREASE 
          No current will go through the circuit. Voltmeter has a very high resistance and
          will not let current pass through. 

          VERLAAG
          Geen stroom sal deur die stroombaan beweeg nie. Die voltmeter het ’n baie
          hoë weerstand en sal nie die stroom deurlaat nie                                   (2)

                                                  14

### Page 15

PHYSICAL SCIENCES: PHYSICS
                    MARKING GUIDELINES
                                                FISIESE WETENSKAPPE: FISIKA
                    NASIENRIGLYNE
                                                (PAPER/VRAESTEL 1)    GR12 0625

9.4   The maximum energy provided/work done by a battery per unit charge
      passing through it.  (2 or zero)

      Die maksimum energie wat ’n battery lewer/arbeid verrig per eenheidslading
      wat daardeur vloei. (2 of nul)                                                (2)

9.5   CIRCUIT A/STROOMBAAN A:                CIRCUIT B/STROOMBAAN B:
      ε = I(R + r)                          ε = I(R + r)
      ε = 2,4(3 + 1,5 + r)  ……(1)           ε = 1,26(3 + 3 + 3 + r)  ……(2)

                                       (1) = (2) 
                           2,4(4,5 + r) = 1,26(9 + r)
                                        r = 0,47 Ω 
                                     ε = 11,94 V 
                                                                                    (6)
                                                                                   [20]
                                                              TOTAL/TOTAAL:        150

                                        15

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