KELANTAN-Answer Physics-Trial SPM 2008

8/14/2019 KELANTAN-Answer Physics-Trial SPM 2008

1/15

Answers to Paper 1

1 C2 D3 C4 B5 C6 A7 A8

A

9 B10 C11 C12 A13 C14 C15 C16 C17 D18 B19 C20 C21 B22 D


2/15

23 D24 B25 A26 D27 D28 A29 B30 B31

C

32 B33 A34 C35 D36 D37 B38 D39 A40 A41 A42 B43 A44 B45 A


3/15

46 C47 A48 D49 A50 B

MARKING SCHEME

Question

No.

Answer Marks

1 (a) P = Lifting Force

Q = Weight / Gravitational Force Attraction

1

1(b) P = Q 1

(c) Lifting Force / P 1

Total

2. (a) 300 s 1

(b) Pt = ml

100 x ( 1050 300) = 0.5 l

l = 150 000 J kg-1

m(with unit) 2

(c) Heat supplied is used to break up bonds between molecules

Heat is not used to increase kinetic energy

Total 5

3. (a) Parallel circuit 1

(b) Mk 1 all symbols correctMk 2 circuit is correct 2

(c) The brightness of lamp J = lamp K = lamp L = lamp M 1

(d) The voltage is the same 1(e) One bulb blow , other bulbs can still lights up 1

Total 6


4/15

4. (a) The process where induced current / e.m.f in a conductor

when the conductor experiences a change in magnetic

flux.

1

(b) (i) Solenoid experiences a change in magnetic field. An

induced current / e.m.f induced in the solenoid

1

1

(ii) A : North pole - 1m

B : South pole - 1m

1

1

(c) (i) Increases 1

(ii) The magnitude of induced current increases // the rate of

change of the magnetic flux increases

1

Total 7

5. (a)Change of momentum/product of Force with time ofimpact

1

(b) (i) Force on the watermelon in Diagram 5.1 is larger than theforce on the watermelon in Diagram 5.2

1

(ii) Time of impact on surface A is shorter than time of impact

on surface B

1

(iii) A shorter time of impact will produce a larger force 1

(c) The change of momentum of the watermelon in Diagram

5.1 is equal to that of the watermelon in Diagram

1

(d) Sponge/carpet/towel/cloth/grass & other suitable materials 1

(e) 1. Body will be hold back by the seat belt when car stoppedsuddenly

2. The seat belt will lengthen slightly, the impulsive force

inflicted on the body will be less

1

1

Total 8

6. (a) The light which has one wavelength / one colour 1

(b) Wavelength of red light > Wavelength of blue light 1

(c)The distance between consecutive bright fringes for red

light is more than that of blue light./

The distance between consecutive bright fringes for thesame light are constant.

1

1

(d) The longer the wavelength, the longer the distance between

consecutive bright fringes1

(e) (i) The distance between two consecutive bright fringes will

decrease1

(ii) a is inversely proportional to x 1

(f) Diffraction // Interference 1

Total 8


5/15

7. (a) (i) Temperature , resistance 1(ii) - Lines drawn on the graph.

-1.35 1

(b) (i) Output,R

01

1

1

1

(ii) OR 1

(iii) 1

(c) (i) To control the current flows into the base terminal. 1

(ii) At night, no light fall on the LDP, resistance, R of LDP .As R, the voltage, V across the LDP also .V across the base circuit > Vmin , this will switch on the

transistor and the collector circuit works.

1

1

1

(iii) The voltage 6 V in the collector circuit will not light up the

bulb.1

Total 10

8 (a) 2

(b) Real, diminished, inverted 1

(c) (i) 1/f = 1/u +1/vv = 15 cm

2

(ii) m = v/u m = 0.5 1

(d)(i) Objective lens = convex lens Y

Eyepiece = convex lens X2

(ii) Power of convex lens X > power of convex lens Y 1


6/15

(iii)

3

Total 12

9 (a) (i) Angle between incident ray and normal line 1

(ii) Increase the angle of incidence,i, then angle ofrefraction,r will also increase

Keep on increasing the angle of incidence untilangle of refraction is 90

The angle of incidence is called critical angle

Increase the angle of of incidence more than thecritical angle

The ray will be reflected.

1

1

1

1

1

4/5

(b) Density diagram 9.2 < density diagram 9.3Refractive index 9.2 < Refractive index 9.3Angle of refraction in diagram 9.2 > angle of

refraction in diagram 9.3The higher the density the smaller the angle of

refraction

The higher the refractive index the smaller the angleof refraction.

1

1

1

1

1

(c)

Suggestion Explanation

Use refractive index of outerlayer is less than the

refractive index of outer

layer

So that total internalreflection can happen in the

fiber optic.

Use high flexibility material so that it can be bend

Use strong material do not break easily

Use thin material Lighter // can be use insmall area

Low density material Lighter

10

Total 20


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10(a) A resultant field due to the combination of the magneticfield due to the current in the conductor and external

magnetic field // Diagram

1

(b) M1 Number of turns in D10.2 is bigger

M2 angle of deflection of the ammeter indicator inD10.2 is bigger

M3 the reading of spring balance in D10.2 is smaller

M4 as current flows is bigger, force acting upwards isbigger

M5 the reading of spring balance is smaller as ,the force

upwards that act onthe coils is bigger

1

1

1

1

1

(c) (i) M1 Force acting on the cooper rod

M2 moved the cooper rod towards the magnet

1

1

(ii) M1 the cooper rod vibratesM2 as current change direction

11

(d) (i) M1 When the current flow into the coil, magnetic field

is produced.

And forces are producedM2 Catapult field is produced

M3 The forces are in the opposite direction

M4 These pair of forces produce the turning effect on

the coil.

1

1

1

1

(ii) M1 Increase the strength of magnet / add more magnetM2 increase the strength of magnetic field

M3 Increase the number of turns in the coils

M4 to increase the magnitude of forceM5 Increase the magnitude of current

M6 to increase the magnitude of force / increase the

strength of magnetic field

11

1

1

1

1

Total 20

11(a) (i) Weight is the gravitational force acts an object. 1

(ii) Upthrust = weight of the boat 1(iii) - Sea water is denser

- Boat displaced less sea water and gain the sameupthrust . Therefore boat sinks less in sea water

1

11

(b) (i) Upthrust = mass of sea water displaced= mg

= Vg= 250 X 1080 X 10 = 2.7 X 10

6N

1

1

1


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(ii) 2. 7 X 106

= V X 1000 X 10

V = 270 m3

1

1

(c) (i)

Specifications Reasons

Small stemand long.

Increase the sensitivity where the scaledivisions are far apart so that small

changes in density can be detected.

Glass wall Do not erode and small adhesive force.

Largediameter of

bulb.

High upthrust /displaces more liquid/tobe able to float easily.

Lead shots Hydrometer can stay upright.

8

(ii) - P is chosen- Small and long stem, glass wall, large diameter of

bulb and lead shots used.

1

1Total 20

12(a) (i) The time taken for half of nucleus radioactive material to

decay.

1

(ii) Fast moving electron / electron 1

(iii) Geiger-Muller tube 1

(b) - 800 ---------> 400 ---------> 200 ----------> 100

----------> 50 //

14 days 14 days 14 days14 days

No. of T 1/2 = 4

- 4 x 14 days / 64 days

1

1

(c) - The state of matter of radioisotope is solid.

- Easier to handled.

- Emits gamma-ray.

- Penetrating power is high.

- Long half-life.

- Last longer.

1

1

1

1

1

1


9/15

- The most suitable radioisotope is Cobalt-60.

- Because the state of matter is solid, emits

gamma-ray and long half-life

1

1

(d) (i) The process of breaking up of on heavy nucleus into lighternucleus.

1

(ii) - Neutron bombarded a uranium nucleus //

Diagram

- Three neutrons produced // Diagram- The new neutron bombarded a new uranium

nucleus // Diagram

- For every reaction, the neutrons produced willgenerate a chain reaction // Diagram - 1m

1

1

1

1

(iii) E = mc2

2.9 x 10-11

= m x (3.0 x 108)

2

m = 3.22 x 10-28

kg1

1

Total 20

PAPER 3

Section A

1(a) (i) Angle of incidence. 1

(ii) Angle of refraction. 1

(iii) Glass block/refractive index of the glass block/density of the glass block. 11(b) (i)

i/0

r/0

20 13

30 19

40 25

50 30

60 36

2

Value of r5 values correct ----- (2)

4 or 3 values correct ------(1)

2 values and below -------(0)


10/15

(ii)

i/0

r/0

sin i sin r

20 13 0.34 0.22

30 19 0.50 0.33

40 25 0.64 0.42

50 30 0.77 0.5060 36 0.87 0.59

1) All quantities i, r, sin i and sin r correct --2) Units for all quantities correct ---- 3) * All values of sin i correct -----

* 1 value of sin i incorrect ------* > 1 value of sin i incorrect ------ 0

4) * All values of sin r correct ----- * 1 value of sin r incorrect ------* > 1 value of sin r incorrect ------ 0

5) Consistency of decimal point for sin i --- 6) Consistency of decimal point for sin r ---

Score Mark

7 8 5

5 6 4

3 4 3

2 2

1 1

0 0

5


11/15

1(c)On the graph paper.

1) Correct title on axes-----2) Units correct ------- 3)

Even scale -------4) * All points correctly plotted --------

1 point incorrectly plotted ------- > 1 point incorrectly plotted ------ 0

5) Best fit straight line -------- 6) > 50% graph paper --------

Score Mark

6 7 5

5 4 4

3 3

2 21 1

5

Total 16

1(d) Sin r is directly proportional to sin i . 1

2(a) (i)R increases linearly with

I

1..(1)

1

(ii)- Extrapolated line shown to intercept at

I

1axis---------(1)

- 0.2 A-1

------------------------------(1)

2

(iii) I

1= 0.4r

0.2 = 0.4r-----------------------(1)

r= 0.5 ---------------------------(1)

2

2(b)

(i)- Show a big on the graph to determine the gradient------------------(1)

- The correct12

12

xx

yy

from the drawn ------------------------(1)

- m = 0.4 A-1

-1------------------ Ans + unit --------------(1)

3

(ii)

m = E

1

,

0.4 =E

1, ----------------(1)

E = 2.5 V --------------------(1)

2

2(c) 1. The connection of the wires must be tight.2. The circuit is switched off whenever the readings were not taken from the

meters. This is to reduce energy loss from the cell.

1


12/15

3 (a)

(b)

(c) (i)

(ii)

(iii)

(iv)

(v)

1 Menyatakan inferens dengan betul

Pressure depends on volume// Volume influences pressure

1 Menyatakan hipotesis dengan betul.

When the volume decrease , the pressure increase ,1 menyatakan tujuan dengan betul

To investigate the relationship between volume and pressure

1 menyatakan pembolehubah manipulasi dan bergerakbalas dengan betul

Manipulated : volume

Responding : pressure

1 menyatakan pembolehubahyang dimalarkan dengan betul

Fixed : mass of gas // temperature

1 menyatakan alat radas dan bahan

Syringe, clip , thick rubber tube, bourdon gauge .

1 menyatakan atau melukis gambar rajah susunan radas.

Menyatakan kaedah mengawal pembolehubah manipulasi

The piston of the 100 cm -3 syringe is adjusted until the volume of air in the

syringe at atmospheric pressure.The other end of the rubber tube is connected tobourdon gauge and the pressure of the air in the syringe is read on the gauge.

1 The piston of the syringe is pushed in until the enclosed volume

is 98 cm3 / V1.

1

1


13/15

(vi)

(vii)

1 Menyatakan kaedah mengawal pembolehubah bergerakbalas.The pressure on the Bourdon gauge is recorded.

1 Menyatakan ulangan eksperimenThe steps is repeated for an enclosed volume of

96 cm3/V2, 94 cm3/V3, 92cm3/V4, 90 cm

3/V5

1 menyatakan kaedah menjadual data dengan betul

tajuk//symbol dengan unit yang betul

Tabulating data

Isipadu,V/cm3 Tekanan,P/ Nm-2 1/V , cm-3

98 /V1

96 /V2

94 /V3

92 /V4

90/V5

1 menyatakan kaedah menganalisa data dengan betul

P ( Nm-2

)

V (cm3) 10

4(a)

(b)

(c)(i)

(ii)

1 Menyatakan inferens dengan betul

Magnetic field strength depends on the number of turns

1 Menyatakan hipotesis dengan betul.

The magnetic field strength will increase when the number of turns

increase

1 menyatakan tujuan dengan betul

To investigate the relationship between magnetic field strength and

number of turn on the coil

1 menyatakan pembolehubah manipulasi dan begerakbalas dengan betul

1

1


14/15

(iii)

(iv)

(v)

manipulated : number of turns

responding : magnetic field strength //number of small iron pin

1 menyatakan bembolehubahyang dimalarkan dengan betul

Fixed : size of current// type of core

1 menyatakan alat radas dan bahan

Retort stand, soft iron core, connector wire, PVC insulated copper wire,

small iron pin, ammeter, rheostat , battery/ power supply

1 menyatakan atau melukis gambar rajah susuan radas berlabel.

1 Menyatakan kaedah mengawal pembolehubah manipulasi

The soft iron core is wound with 20 turns of insulated copper wire and set

up as shown in diagram above.

1 Menyatakan kaedah mengawal pembolehubah bergerakbalas.

The switch is turned on and the rheostat adjusted until the ammeterReading is 1.0 A. The beaker containing small steel pin then

brought near the iron core.

Count and record the number of small iron pin attached to the softIron core.

1 Menyatakan ulangan eksperimen

Repeat the experiment by winding the soft iron core with, 30 turns,40 turns, 50 turns and 60 turns.

turns

retort stand

Soft iron core

small iron pins


15/15

(vi)

(vii)

1 menyatakan kaedah menjadual data dengan betul

tajuk//symbol dengan unit yang betul

Numberof turns, n,

turns

Number of pins attached, n /pieces

20 / n1

30 / n2

40 / n3

50 / n4

60 / n5

(vii) 1 menyatakan kaedah menganalisa data dengan betul

number of pin

n / pieces

Number of turns/turns

JAWAPAN TAMAT

10

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KELANTAN-Answer Physics-Trial SPM 2008

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