skema kertas 2 set 1

SKEMA/4531/2 SET 1 MODUL G-CAKNA

PANEL MODUL G-CAKNA 1

QUESTION MARKING SCHEME SUB-MARK

TOTAL MARK

1(a) Inverted / Virtual / Enlarged / Magnified 1 1

(b)(i) Atau Mark dapat jika (b)(ii) betul

1

3

(ii) M1 The object is at u < f M2 Correct ray diagram & symbol of mirror (Shape of mirror bergantung kepada ray diagram untuk cahaya datang) Syarat : M2 dapat jika objek, O dan imej, I dilabel

1 1

TOTAL

4 M

2(a)(i) Electromotive force / e.m.f. 1 2

(ii) 1.5 V ( with correct unit) 1

(b)(i) M1 Calculate the gradient of graph

= 1.5 1.0

0.0 0.4 // - 1.25

M2 State r = - gradient // state correct value of r

1.25 VA-1 /

1 1

2

(ii) Increases 1 1

TOTAL

5 M




TOTAL MARK

3 (a) Electrical energy Heat energy

1

1

(b) M1 0.3 x 4200 x (100-28) M2 90720 J (with unit)

1 1

2

M1 800 x 150 0.05 M2 2 x 106 Jkg-1 (with unit)

1 1

2

Heat is used to overcome/break the attraction force/bonding between the molecules

1 1

TOTAL 6 M

4 (a) Pascals principle (Correct spelling) 1 1

(b) Produce air bubble at high temperature // Boiling point low 1 1

(c)(i) M1 Piston A has smaller surface area to produce big pressure M2 Piston B has bigger surface area to produce big force at piston B

1 1

2

(ii) Increase surface area of piston B // Decrease surface area of piston A

1 1

(d) M1 50 15

2

M2 375 N (With unit)

1 1

2

TOTAL 7 M

5 (a) Rate of change of momentum Terima jika beri rumus dengan memberi maksud kepada setiap simbol

1 1

(b) (i) Diagram 5.1 > Diagram 5.2 // vice-versa 1

3 (ii) Diagram 5.1 < Diagram 5.2 // vice-versa 1

(iii) Diagram 5.1 > Diagram 5.2 // vice-versa 1

(c) (i) When time (of contact) decreases, displacement (of the ball) increases

1

2 (ii) When change of momentum is increases, the

displacement (of the ball) increases 1




TOTAL MARK

(d) (i) F inversely proportional to t // F 1

1

2 (ii) F directly proportional to (mv mu) / change of momentum // F change of momentum

1

TOTAL 8 M

6 (a) Light that has one colour / wavelength / frequency 1 1

(b) M1 Overlapping between crest and crest / trough and trough producing a constructive interference / bright fringes M2 Overlapping between crest and trough producing a destructive interference / dark fringes

1 1

2

(c) (i) Diagram 6.1 < Diagram 6.2 / vice-versa // a1 < a2 / vice-versa 1

4 (ii) Same / equal 1

(iii) Same / equal / D1 = D2 1

(iv) Diagram 6.1 > Diagram 6.2 / vice-versa 1

(d) x 1

1 1

TOTAL 8 M

7 (a)(i) A material( that can) conduct (electricity) better than insulators but not as good as metal conductor

1 1

(ii) Diagram 7.1 1 1

(iii) M1 A diode only allow current to flow in one direction // Diode is in forward biased M2 Resistance of diode is low

1 1

2

(b) (i)

1 2

(ii) Capacitor 1




TOTAL MARK

(c) (i) (ii) (iii)

M1 Susunan diod betul M2 Kedudukan kapasitor selari dengan R (Terima tanpa label symbol betul) M3 Bentuk waveform betul * Terima kedudukan diod dan waveform terbalik

1 1 1

3

(d) Full wave rectification 1 1

TOTAL 10 M

8 (a) - an unstable nuclei//unstable isotope 1 1

(b)(i) Fast moving electron 1 2

(ii) G-M tube 1

(c) (i) -not strong enough to pass through the juice 1

2 (ii) - will not be stopped by the juice 1

(d) Lead container 1 1

(e) (i) E 1

3

(ii) M1 the most radioactive emission pass through the juice M2 the reading of rate meter is the highest

1

1

(f) (i) still there is reading shown

1

3

(ii) M1 back ground reading M2 back ground reading is from radioactive materials naturally present in soil, rock or cosmic radiation

1

1

TOTAL 12 M




TOTAL MARK

9 (a) Quantity of heat required by 1 kg of mass to increase the temperature by 1oC 1 1

(b) (i) Mass of cooking oil in Diagram 9.1 < Diagram 9.2 // vice- versa 1

3 (ii) Quantity of heat is equal / same 1

(iii) final temperature in Diagram 9.1 > Diagram 9.2 1

(c) M1 When mass of cooking oil is small, the fish is overcooked /scorched // vice-versa M2 When mass is small, increase in temperature is high // mass inversely proportional to increase in temperature

1 1 2

(d) M1 During the day, the sea and the land receive the same amount of heat from the sun M2 Land heated to a high temperature because land has low specific heat capacity // vice-versa M3 During night, air above the land and sea release Heat M4 Temperature of the sea decreases slowly because water has low specific heat capacity // vice-versa

1 1 1 1

4

(e) M1 Size of fan big M2 More wind blows to cool the hot water faster M3 Number of fins many M4 Can cool the engine faster M5 Cooling liquid is water M6 High specific capacity// high boiling point//cheap//easily available//does not react with the inner part of engine M7 Liquid that has high specific heat capacity M8 Transfer large quantity of heat with small increase in temperature M9 Liquid of high boiling point

1 1 1 1 1 1 1 1 1

10




TOTAL MARK

M10 Not easy to vapor when absorb heat from the engine

1

TOTAL 10 M

10 (a) Current that produced when there is a relative motion between a wire conductor and a solenoid, the magnetic field is cuts

1 1

(b)(i) M1 The height is equal M2 Number of turns in Diagram 10.1 < Diagram 10.2 // vice-versa M3 Angle of deflection in Diagram 10.1 < Diagram 10.2 // vice-versa

1 1 1

3

(ii) M1 When number of turns increases, angle of deflection increases // vice-versa M2 When the induced current produced increases, the deflection of the galvanometer increases // vice- versa

1 1 2

(c)(i) Lenzs law (Correct spelling) 1 1

(ii) M1 When ac current produced, the soft iron core is magnetised and demagnetized M2 Producing a changing magnetic flux M3 Producing an induced voltage at secondary coil

1 1 1

3

(d) M1 Increase speed of rotation M2 Increase the rate of cutting of magnetic flux M3 Use a stronger magnet M4 To produce more magnetic flux M5 Increase the number of turns at coil M6 More magnetic flux is cut M7 The coil is wound on a soft iron core M8 Increase the strength of magnetic flux

1 1 1 1 1 1 1 1

10




TOTAL MARK

M9 Increase the area of cross section/ thickness / diameter of wire at coil M10 Decrease resistance, more current is induced

1 1

TOTAL 20 M

11 (a) (i) Convex lens

1

(ii) M1 Object at u < f M2 Ray refract to F and ray pass through center of lens M3 Virtual line and image is labeled

M4 State : Virtual, Upright, Magnified

1 1 1 1

4

(b) (i) M1 1

5 //

100

5

M2 0.2 m // 20 cm

1 1

5 (ii) M1

1

20

1

30

M2 60 cm // 0.6 m (Dengan unit)

1 1

(iii) 6030

// 2 (tanpa unit) 1



(c)

Characteristics Explanation

Type of lenses Jenis kanta:

convex

Produce real image

Focal length of objective lens,fo / Focal length of

eyepiece lens,fe Jarak fokus kanta objek fo/ Jarak fokus kanta mata fe,

4 cm / 6 cm

Both lenses have high power of the lens to produce bigger image

Distance between two lenses, L (cm) Jarak antara dua kanta,

L (cm) L > fo + fe

Normal adjustment to produce sharp image

Power of eyepiece Kuasa

kanta mata High / tinggi

Eyepiece act as magnifying glass to magnified the image

Choosen : R Because R are convex lenses,has f0= 4 cm and fe = 6 cm, L > fo + fe and has high power of eyepiece.

1, 1

1, 1

1 , 1

1.1

1,1

10

TOTAL 20 M

12 (a) 1 000 J of energy is consumed in 1 s when connected to a 240 V power supply 1 1

(b) (i) M1 1 000 x 2 x 60 x 60 M2 7.2 x 106 J (With unit)

1 1

4 (ii) M1 1000

240

M2 4.17 A (with unit)

1 1

(c) (i) M1 When high current flows / short circuit occurs M2 The wire in the fuse will melt and break the circuit

1 1

2

(ii) 5 A 1 1

(iii) M1 Live wire M2 Because live wire carries current

1 1

2




TOTAL MARK

(d) M1 Melting point is low M2 Easy to break the circuit when high current flows through it M3 Low specific heat capacity M4 Easy to get hot M5 High resistance M6 Easy to get hot M7 Thickness of wire small / thin wire M8 High resistance // Easy to hot // less mass // requires small space M9 M M10 Because (M1,3,5 & 7 / M2,4.6.8)

1 1 1 1 1 1 1 1 1 1

10

TOTAL 20 M

SKEMA TAMAT.

Skema ini adalah cadangan jawapan. Jika ada jawapan lain yang setara

adalah mengikut budi bicara tuan/puan.

skema kertas 2 set 1

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