PHYSICS PERFECT SCORE

PHYSICS PERFECT SCORE SEKOLAH BERASRAMA PENUH 2014

PERFECT SCORE MODULE 2014Sekolah Berasrama Penuh Kementerian Pelndidikan MalaysiaPHYSICS Beyond Norsaidah (TKC) Jennyta (SASER) Haslina (SEMASHUR)

TABLE OF CONTENTSECTIONCONTENTPage

A Diagnostic Test Analysis1 2627 - 28

BEnhancement Question

1. Force & Motion29 - 30

2. Force and Pressure30 - 33

3. Heat34 - 37

4. Light37 - 41

5. Waves41 - 42

6. Electric43 44

7. Electromagnet45 47

8. Electronic47 - 50

9. Radioactivity50 - 52

10. Basic Mathematics / Science Skill53 - 55

PHYSICS PERFECT SCORE 2014 PANELS

NORSAIDAH BT HASSAN - Kolej Tunku Kurshiah (TKC)( Head of Panels )

HASLINA BT ISMAIL - SMS Hulu Selangor (SEMASHUR)

JENNYTA BT NOORBI SMS TUANKU MUNAWIR (SASER)

.From Physics panels, we would like to wish you all the best in your SPM 2014 examination. Make SBP, your parents and teachers proud of you

We are family.We are one you and I, we are like the earth and sky. ONE FAMILY under the sun."Disney's The Lion King 2 song- Simbas Pride.

SECTION A:

DIAGNOSTIC TEST

1 Diagram 1 shows the velocity time graph for the motion of a car

Velocity/m s-1Time/s 0 4 8-4-8510152025

Diagram 1

Calculate the displacement traveled by the car.A80 m B100 mC120 m D140 m

2 Diagram 2 shows a trolley is moving down on a friction compensated runway

Diagram 2

Which of the following statements is true about the trolley?A It moves with acceleration. B It moves with constant velocityC It remains stationary.

3 Diagram 3 shows a picture is hanging on a wall. Three forces T1, T2 and weight, W are acting on the picture

T1 T2

Diagram 3Which of the following vector diagrams, represents the forces which act on the picture are in equillibrium?

AB

CD

4 Diagram 4shows a box of mass 5 kg is pulled by a force of 100 N at the angle of 60 to the horizontal plane. The frictional force acting towards the box is 10 N.

100 N

60o10 N

Diagram 4

Calculate the acceleration of the box.A 5.0 m s-2 B8.0 m s-2 C.10.0 m s-2 D15.3 m s-2

5 Diagram 5 shows a trolley of mass 500g is sliding down a smooth curved ramp.

Smooth curved ramp

15 m

v

Diagram 5

What is the speed, v of the trolley?

A 4.0 m s-1 B17.3 m s-1 C3.5 m s-1 D75.0 m s-1

6 Diagram 6 shows a graph of force, F, against the extension, x , of the two springs, and QF / N

P

Q

0 X / cm

Diagram 6

Based on the graph, which of the following statements is true ?

A Spring Q needs a bigger force than spring P to produce the same extension B The diameter of spring Q is bigger than spring P

C Both spring are made of the same material

D Spring P is easier to extend than spring Q

7 Diagram 7 shows a ship floating on the surface of the sea. The density of ocean water at the sea surface is 1027 kg m-3. The volume of the ship below the water level of the sea is 1500 m3

Diagram 7

What is the weight of the ship?A 1.46 x 103 NB 1.54 x 106 N C 1.61 x 106 N D 1.54 x 107 N

8 Water pressure determines the flow of water from the tap.The amount of pressure at your tap can depend on how high the service reservoir or water tower is above your home, or on how much water other customers are using. The height of your property can also affect your water pressure. Diagram 8 shows a water tank that supplies water to a three storey building.

Diagram 8What is the total pressure at tap Y?(Density Of Water = 1000 Kg M-3, Atmospheric Pressure = 1.0 X 105 Pa)

A 9.0 x 104 PaB 1.2 x 105 PaC 1.9 x 105 PaD 2.2 x 105 Pa

9 Which graph shows the correct relationship between pressure, P and depth, h?

10 Diagram 9 shows a simple mercury barometer. The height of the mercury level is h.

Diagram 11Diagram 9

What happens to the value of h when mercury is added to mercury reservoir?A Increases B Decreases C Remains constant

11 Diagram 10 shows a hydraulic compressing machine.

Diagram 10

Which comparison is true about the forces F1 and F2?A F1 < F2B F1 = F2C F1 > F2

12 A buoy is a floating object which is anchored to the bottom by a long rope or cable to keep it from drifting away. Diagram 11 shows three buoys, X, Y and Z used to warn ships about wrecks or other dangers.

Diagram 11

Which of the following is correct for the density of buoy X, Y and Z? A X = Y = Z B Z > X > YC Y > Z > XD Z > Y > X

13 Diagram 12 shows two identical containers, P and Q containing objects Y and X which have the same size but of different densities. The upthrust, FP and FQ are exerted on the container P and Q respectively.

Diagram 12

Which comparison of upthrust is correct?A FP > FQBFP = FQCFP < FQ14 Diagram 13 shows a toy ball of volume V floating with above water.

Diagram 13If the density of water is , what is the buoyant force acting on the toy duck?A gB gVC VgD

15 Which diagram shows the correct liquid level in the tube?

A

C

B

D

16 Diagram 14 showsan oven isusedto bakea cake. After45 minutes,the cake reaches thermal equilibrium.

Diagram 14

When is thermal equilibrium reached?A When allthe heat from theoven has transferred to the cakeB When the netrate ofheattransfer between the cake andthe oven is equalC When the temperatureofthe cakeis equal to the temperatureof theoven.DWhen the temperature released by the oven is equals to the temperature gained by the cake

17 When water boils at 1000C, the heat absorbed by the waterA is lost to the surroundings Bmakes the steam molecules moves randomlyCincreases the kinetic energy of the water moleculesDovercome the forces between the water molecules

18 Diagram 15 sshows threeflat bottom flasks L, M and N contain 100 gof ethanol, 200gofwater and 100 gof water respectivelyat thesameinitial temperature. The heat is supplied at the same rate. After 3 minutes the temperature, Tofliquid in flasks L, M, and N are recorded.

Diagram 15

Which comparison is correctabout thetemperatureof liquid, T in flask L, M, and N, if the specific heat of ethanolisless than the specificheat of water?A TN L >I

20 Different materials melt at different temperatures. The chart shows the melting points of some materials you know. You might find some of these materials in your kitchen.

Which of the following best describes the process of melting chocolate in your mouth at a steady rate from a temperature of -15 0C until it reaches your mouth temperature (oral temperature) which is 37C?

ATemperature, (oC)0 time, (s) 37 - -15 -CTemperature, (oC)0 time, (s) 37 - -15 -

BTemperature, (oC)0 time, (s) 37 - -15 -DTemperature, (oC)0 time, (s) 37 - -15 -

21 Diagram shows sea breeze phenomena.

The phenomena is due toA seais as warm as landC land is warmer thanseaB seais warmer than land

22 Tyre pressure, fluid levels and windscreen wipers should all be checked often and particularly before a long drive to avoid being left at the side of the road. Diagram shows the air pressure in car tyres before and after a long drive.

RIGHT REARBefore: 32 psiAfter : 35 psiRIGHT FRONTBefore: 35 psiAfter : 38 psiLEFT REARBefore: 35 psiAfter : 38 psiLEFT FRONTBefore: 35 psiAfter : 38 psi

(1 pound per square inch, psi =6894.76 Pa)This can be explained byAPressures law.CBoyles law.BCharles law.DHookes law

23 Syikin wants to set Girl Blue Eyes Bubbles Water Art HD Wallpaper (Diagram below) on her desktop as background..

She observes that the size of the air bubbles increases as it reaches the surface. Which law explains the situation above?APressure Law CCharles Law BBoyless Law DSnells Law

24 Diagram shows acapillarytubecontainingsometrappedair insideit. At 27 C, the vertical column of trapped air is 10.0 cm.

The capillarytubeis heated untilthe vertical column of trapped airexpands to 10.7cm. Whatis the final temperatureof the trapped air?A29C B 48C C 54CD 321C

25 Diagram shows Mr. Zain is having a hair cut in a barbers shop.

http://www.jantoo.com/cartoons/keywords/barbershops http://www.jantoo.com/cartoons/keywords/barbershops 1 m 0.2 m

The barber uses plane mirror Q tohelp Mr. Zain to see the backof hishead. If Mr. Zain is facing plane mirror P, what is the distance between Mr. Zain and the first image of the back of his head formed by plane mirror P?A1.4 mB 2.0 mC 2.2 mD 2.4 m26 Diagram shows a toy penguin placed in front of a concave mirror

http://fphoto.photoshelter.com/image/I00002NWBTZktBbY

Which of the following shows the correct relationship between the object distance, u and the focal length, f to explain the situation?A u < f B u = fC u > f D u > 2f

27 Which of the followingcombinationcorrectlyshowthe pathofthe lightthat strikes the surface of the mirror?

A

B

C

D

28 Diagram shows a ray of light travels through a glass block.

glassWhat is the refractive index?A sin p/sin qC sin s/sin rB sin q /sin sD sin t/sin p

29 Diagram shows a layer of oil floating on water. Which light ray in Diagram 24 is correct?

D C A BOilLight ray Water

30 Diagram shows a situation when an object viewed underwater. The object appears shallower than it actually is.

yzxWhat is the refractive index?A x/zC x/yB y/z

31 Diagram shows a light ray traveling from air into a semi-circular glass block. The critical angle of the glass is 42 0, which path of the ray of light is correct?

Incident ray

32 Diagram shows the formation of the image of an object by a convex lens.

What is the focal length of the lens?A 0.2 cm C 5.0 cm B 1.2 cm D 6.0 cm

33 Given u is object distance, v is image distance and f is focal length, which of the following is valid for thin lenses?

Af = C

=

B

= Df =

34 Diagram shows the arrangement of two convex lenses P and Q of an astronomical telescope at normal adjustment. The power of lens P is 5 D and lens Q is 25 D.

Lens P Lens Q Calculate the distance between lenses P and Q.A 2.04 cm B 20.0 cm C 24.0 cmD 30.0 cm

35 Diagramshows the image of the object seen under a magnifying glass.

fphoto.photoshelter.com

The position of the object must be A Less than f C Equal to 2fB Between f and 2f D. More than 2f

36 Diagram shows the displacement-timegraph of awave.

What is the frequencyofthe wave?A 0.25 Hz.C 2 Hz B 0.5D 4 Hz

37 A transverse wave is travelling to the right along a rope. Diagram represents a photograph of the wave pulse at a particular instant.

Direction of wave motion XY

The movement of the particles X and Y at the instant will be

XY

ADownwardDownward

BUpwardDownward

CDownwardUpward

DUpwardUpward

38 Diagram shows the displacement- distance graph of a wave.

Which ofthe following is correct?AThe amplitude is 2.0 cm BThe wavelength is 4.0 cm CThe period of oscillation is 4.0 sDThe number of oscillation in 2 s is 0.5

39 Diagram shows agraph of an oscillation system which is experiencing damping.

Which ofthe followingquantitydoes not change? A Sizeof oscillationC Energyof oscillationB Period ofoscillationD Amplitude ofoscillation

40 A set of plain water waves in a ripple tank travels over a triangular perspex plat. Which of the following shows the correct wave pattern?

41 Diagram shows an interferencepatternofwaterwavesfromtwocoherentsources M and N.

ACBD

Key: CrestWhich point is the node?

42 Radio waves, visible light and X- rays are all part of the electromagnetic spectrum.What is the correct order of increasing wavelength?

Shortest longestARadio wavesVisible lightX-ray

BRadio wavesX-raysVisible light

CX- raysRadio wavesVisible light

DX- raysVisible lightRadio waves

43 Diagram shows a circuit.

V1 R =12 V3 9V

V2 R= 6

What is the reading on the voltmeter V2?A 3 V B 6VC9VD 15 V44 Why is the filament made in the shape of a coil? A To increase the current and produce more energyB To increase the length and produce a higher resistance C To decrease the resistance and produce a higher current D To decrease the current and produce a higher potential difference

45 A current flow in two resistors connected in series as shown in Diagram 24. A1 and A2 are the reading on the ammeter, V1 and V2 are the reading on the voltmeters.

V1 V2

Current A1 5 10 A2

Diagram 24

Which of the following correctly describes the ammeter and voltmeter reading?

Ammeter readingVoltmeter readingAA1 < A2V1 < V2BA1 = A2V1 = V2CA1 = A2V1 < V2D A1 > A2V1 = V2

46 The diagram shows free electrons flowing in a conductor. A total of 2.50 x 1019 electrons pass through the cross-sectional area in 5.0 seconds.[Charge carried by one electron, e = 1.6 x 10-19 C]

What is the current in the conductor?A0.40 AB2.00 AC0.64 AD0.80 A47 Circuit below shows two identical bulbs and a resistor.

Power sourceYZXResistor

The values of currents at X, Y and Z are measured.Which set of values could be obtained ?

XYZ

A6A4A2A

B4A4A4A

C6A2A4A

D4A2A2A

48 Diagram shows a complete circuit. The reading of the ammeter is I and the voltmeter is V.

How do the values of I and V change when the sliding contact S of the rheostat is slowly moved from X to Y?IV

ADecreases Decreases

BIncreasesDecreases

CDecreasesIncreases

DIncreases

Increases

I

49 In the following circuits, all the resistors and light bulbs are similar. In which circuit is the light bulb the brightest?

50 Diagram shows a dry cell connected to a voltmeter and a rheostat. The reading of thevoltmeter is 1.0 V. If the slider on the rheostat is now moved a little, the reading on thevoltmeter becomes 1.2 V.

What are the changes made to the circuit when the rheostat slider is moved?Internal resistance of cellCurrent in cellResistance of rheostat

ANo changesIncreasesDecreases

BIncreasesNo changesDecreases

CNo changesDecreasesIncreases

DDecreasesDecreasesIncreases

51 A light bulb is labelled 240 V, 60 W. What is the quantity of charge that flows through the bulb when it lights up at normal brightness for 600 s?A150 CB360 CC840 CD2400 C

52 Diagram shows an electric circuit.

10 6 V

What is the energy dissipated in the resistor when the switch is on for 1 minute?A6 JB60 JC216 JD3 600 J

53 Diagram shows an electric circuit consisting of three resistors and power supply 12 V

What is the power loss due to the resistors in the circuit?A 1.5 WB 3.0 WC 10.3 WD 12.0 W

54 The diagram shows a circuit that consists of three identical resistors and three ammeters. A3

Diagram 20

Which of the following shows the correct reading of ammeter?A A1 = A2 = A3B A1> A2 = A3C A1< A3< A3D A1> A3> A2

55 A label 240V,1500W on electrical kettle meansA1500 A of current used every 1 second when connected to 240 V supplyB 1500 W of power used every 1 second when connected to 240 V supplyC1500 V of voltage used every 1 second when connected to 240V supplyD1500 J of energy used every 1 second when connected to a 240 V supply 56 Diagram shows a graph of the potential difference, V, across the terminals of a cell against with the current, I, through the cell.01.20.40.200.84V / VI / A

What is the internal resistance of the cell?A0.80 B1.16 C1.25 D1.43 57 Diagram shows an electromagnet.

What is the polarity at X and Y when the current flows?XY

ANorthNorth

BNorthSouth

CSouthSouth

DSouthNorth

58 Diagram shows four compasses placed near a solenoid.

Which of the following shows the correct direction of the plotting compasses when the current flows through the solenoid?A B

C D

59 Diagram shows the set up of the apparatus to study the pattern of the magnetic field produced by the current in a straight wire

ObserverIron filingsCardboardWire

Which diagram shows the correct pattern and direction of the magnetic field that will be seen by the observer?AB CD

60 Diagram shows two coils are wounded on an iron ring. When the switch K is closed, what will happen to the bulb connected to the secondary coil?

A Lighted up with increasing brightness.B Flashed at a constant frequency C Flashed only ones D Not lighted up

61 Diagram 32 shows an electric dynamo. Which graph describes the variation of the current displayed on the CRO screen.

62 Which of the following can be used to determine the direction of magnetic field produced by a current-carrying conductor?A Lenzs lawB Faradays law CFlemings Left-hand rule DRight-hand Grip rule

63 Diagram shows a bar magnet is moving towards a solenoid.

What is the magnetic polarity at both ends of the solenoid, X and Y? X Y A South South B South North C North North D North South

64 The following circuit diagrams show four diodes connected to an ac power supply. Which circuit will make the bulb lights up with maximum brightness?

AB

CD

65 Which circuit will not light up the bulb?A

B

C

D

66 Diagram shows a simple electric circuit.

Which logic gate is equivalent to the circuit above?AAND gateCNAND gateBOR gateDNOT gate

67 Diagram shows an automatic switch circuit to light up a bulb at night.What changes should be done to light up the LED during day time?AInterchange R1 and R2 BReverse the terminal of the batteryCReplace the npn transistor with a pnp transistorDReplace resistor R3 with a resistor of lower resistance

68 Which of this following can be used as a moderator in a nuclear reactor ?Aconcrete slab Bboron rodCgraphite core Duranium rod

69

The decay of actinium, to lead released several and particles. Determine the number of and particlesA5 + 3 B 5 + 2 C3 + 5 D 3 + 2

70 Diagram shows a nuclear reaction.

The nuclear reaction is Anucleus fissionBchain reactionCnucleus fusionDnucleus disintegration

DIAGNOSTIC TEST (ANSWER and ANALYSIS)

QuestionAnswer or TopicMarkRemarks

1. Forces and Motion / 6

2.

3.

4.

5.

6.

7. Force and Pressure / 9

8.

9.

10.

11.

12.

13.

14.

15.

16. Heat / 9

17.

18.

19.

20.

21.

22.

23.

24.

25. Light / 11

26.

27.

28.

29.

30.

31.

32.

33.

34.

35.

36. Waves / 7

37.

38.

39.

40.

41.

42.

43. Electricity / 14

44.

45.

46.

47.

48.

49.

50.

51.

52.

53.

54.

55.

56.

57. Electromagnetism / 7

58.

59.

60.

61.

62.

63.

64. Electronics / 4

65.

66.

67.

68. Radioactivity / 3

69.

70.

TOTAL / 70

SECTION B

1. Force & Motion

Question 1

Given the displacement-time graph below,

Draw the corresponding velocity-time and acceleration-time graphs, and then describe the motion of the object.

[4 marks]

Question 2

A 6.0 N weight is attached to a light string which is then tied to the midpoint of a second string of length 0.8 m.This string is suspended from two fixed points which are on the same horizontal line 0.60 m apart.The arrangement is shown below:

a) What is the angle between the two halves of the string?b) Draw arrows of all forces involved to represent the situation.c) What is the tension in each string? [5 marks]

Question 3The inclined plane (ramp) is a simple machine that helps us to get stuff down or up

A person is pushing a wheelbarrow along a ramp that makes an angle 25 with the horizontal. The wheelbarrow and load have a combined mass of 60 kg. What is the pulling force the person must apply along the inclined plane so that the wheelbarrow moves with a constant speed on that ramp? The friction between the ramp and the wheelbarrow is 40 N. [4 marks]

2. Forces and Pressure

Question 1Diagram 1 shows a suction pump being used to lift a mirror that measured 1.5 m X0.5m X 0.01m . The density of the mirror is 2.5 X 10 3 kg m-3 .The pump obeys atmospheric pressure principle to let the suction pump stick onto surface of mirror.

rubberDiagram 1

(a) Explain how the suction pump can lift the mirror with the aid of atmospheric pressure. [4 marks](b)Calculate the weight of mirror above. [2 marks]

Question 2

During the school football match, a penalty kick made by a player is in a curved path. The ball which is kicked to spin moves in a curved path. Explain why the path taken by the spinning ball is curved. [3 marks]

Question 3

Diagram (a) shows a simple mercury barometer placed at the sea level. Diagram (b) shows the height of mercury column when barometer is placed on the top of Mount Kinabalu.

vacuum

Mercury column

Placed at the sea levelPlaced on the top of Mount KinabaluDiagram (a) Diagram (b)

(a) Explain what happen to the mercury column in Diagram (b). Give reason.

Filled with gas[3 marks]

Mercury column

Diagram (c)

(b)If the gas is filled in the vacuum column,explain what will happen to the height of the vertical column of mercury. [ 2 marks ]

Question 4

Diagram shows an apparatus used to remove water from a beaker A to beaker B.

(a) Explain how the water flows from the beaker to the cylinder as shown inthe diagram. [4 marks](b)Explain how do we stopsthe water from flowing to the cylinder. [1 mark]

Question 5

Siti suspects a necklace diamond owned by her is not genuine. The density of the diamond is 27.3 g cm-3. Siti is told that decoration with diamond content exceeding 75% is assumed as genuine diamond.

(a) Suggest a method to be taken by Siti to solve her problem. [5 marks]

(b) If the mass of the necklace is 265 g and the volume is 20 cm3, determine whether the diamond necklace is genuine or not. [3 marks]

Question 6

The manager of a hot air balloon carnival wanted to know the best time in a day to launch the balloons. The balloon should be able to rise to about the height of a five-stories building.Give your suggestion and explain why. [5 marks]

Question 7

Diagram (a)

(a) Diagram (a) shows the hydraulic system which is used to lift a car in a workshop. Explain briefly how the car can be lifted up when the force is exerted on Piston A. [4 marks]

Diagram (b)

(b) Diagram (b) shows a hydraulic system used to raise a load by a distance of X m. A force of 50 N is applied on piston A of cross sectional area 2 cm2. Load is placed on piston B of cross sectional area 15 cm2.

(i) Calculate the force acting on piston B . [2 marks] (ii) Calculate the distance , X ,moved by piston B if the distance moved by piston A is 21 cm[2 marks] Question 8

Diagram (a), Diagram (b) and Diagram (c) show a fisherman pulling a fishing net out of the river. In Diagram (a), the fisherman finds it is easy to pull up the fishing net while most of his catch is in the water, due to the buoyant force. However as more and more of the catch is out of the water it gets harder to pull up the net as shown in Diagram (b) and Diagram (c).Explain the situation[5 marks]

Digram (a) Diagram (b) Diagram (c)

Diagram (c)Diagram (b)Diagram (a)

Question 9

Diagram (a) and Diagram (b) show a Bunsen burner and its inner structure. Based on Diagram (b) explain how a blue flame can be produced. [4 marks]

Diagram (a) Diagram (b)

3. Heat

Question 1

Diagram shows the air pressure in the tire of a car being measured by a pressure gauge.

Based on kinetic theory of gasses, explain why the air pressure in the tire increases after the car has completed a long journey. [4 marks]Question 2

The diagram shows a manometer is connected to a gas tank. When the clip is opened the positions of mercury level at point X and Y are 45 cm and 25 cm respectively. The temperature of the gas is 127oC.[ Atmospheric pressure = 75 cm of Hg ]

(a)Determine the pressure (i) of the gas in the gas tank [1 mark]

(b)When the gas is cooled down to T oC,the mercury level , Y increasing and X decreasing until X and Y at same level.(i) Based on the kinetic theory of gases explain why the mercury level X decreased [2 marks](ii) Calculate the value of T. [2 marks](iii)Name the law involved in b(ii). [1 mark]

Question3

The temperature of 5 kg of water rises by 50 0C when heated. What is the temperature rise when 8 kg of water is heated by the same amount of heat energy? [3 marks]

Question4

Water takes a longer time to boil when heated at low lands than at high lands, although the same amount of energy is used.This is due to the rate of heat lost is lower at low lands.Explain the statement [4 marks]

Question 5

A copper block with mass of 200 g is placed in boiled water. After the thermal equilibrium achieved, the block is taken out and put it back in 100 cm 3 water at 28 C. [ specific heat capacity of copper = 379 J kg -1 C-1 , specific heat capacity of water = 4200 J kg -1 C-1 , water density = 1 g cm -3 ]i) What is the initial temperature of copper block before we put it in 100 cm 3 water at 28 C?[1 mark]ii) What is the mass of the 100 cm 3 of water?[2 marks]iii) What is the final temperature of the water?[2 marks]

Question 6

Diagram shows two ice cubes of masses m and 2m, melting at room temperature. The temperature of the ice cubes were initially at -5 oC.

m2m

Sketch the graph shows the correct temperature versus time relationship for the two ice cubes ?

Temperature/oC

Time/min

Question 7

Diagram (a) shows a metal P at 100C being placed in a beaker of water at 28 o C. After a few minutes thermal equilibrium state is achieved. The mass of metal P and the water are 0.4 kg and 0.2 kg respectively. Diagram (b) shows a temperature against time graph of the water in the beaker.

Diagram (a) Diagram (b)(a) (i)What is the meaning of thermal equilibrium? [1 mark](ii) Based on the graph in Diagram 3.2, what is the temperature when the thermal equilibrium is achieved? [1 mark](iii) What is the purpose of wrapping the beaker with cotton layer? [1 mark](b (ii) Calculate the specific heat capacity of metal P.(Specific heat capacity of water is 4200 J kg-1 C -1)[2 marks]

(ii) State the assumption you made in (b)(i) [1 mark]

Question 8

(a)A solid substance of mass 0.05 kg is heated using an immersion heater of 240V, 1 kW for 1.0 minute until its temperature is 78oC (i)What is the meaning of temperature? [1 mark](ii)Calculate the specific heat cpacity of the substance if the initial temperature of the substance is 20oC?[2 marks]

(b)The substance is then put into a beaker filled with water of mass 2.0 kg and temperature 28oC. Calculate the final temperature of the substance and water.(Specific heat capacity of water is 4 200 Jkg-1oC-1)[2 marks]

Question 9

Diagram (a) shows a dented ping-pong ball is placed in hot water. Diagram (b)shows the ping-pong ball reverted to its original spherical shape after a few minutes.

Diagram(a) Diagram (b)Using the concept of physics, explain how the ping-pong ball reverted to its original spherical shape. 4. Light

Question 1Diagram shows the photograph of reflection of seagull in the water.

By using a ray diagram, explain how the image of the seagull is formed and state the characteristics of image.[4 marks]

Question 2

You are given three mirrors of equal size. Explain how will you identify them as convex, concave and plane mirror.[4 marks]

Question 3

Diagram shows a rear-view mirror in an automobile.

http://www.garylellis.org/tag/rear-view-mirror/

Explain why a convex mirror is used as a rear-view mirror in the automobile. Suggest how the brightness and glare of lights on the mirror caused by headlights of vehicles behind can be reduced.[4 marks]Question 4

The light beam in the diagram below strikes surface 2 at the critical angle, x = 42.

Determine the angle of incidence, y[4 marks]Question 5

When you are driving on a hot day, an inferior mirage may appear to be a pool of water on the road in the distance, when really all it is, is an illusion.

ObjectDiagram 5.1 shows the inferior mirage.

ImageroadDiagram 5.1

By using a ray diagram, explain how the inferior mirage is formed.[4 marks]Question 6

Shown below is a situation where a coin is placed in the bottom of a foam cup. Situation A is before and situation B is after water is poured into the cup. In which situation is the coin more visible to the observer?By using physics concept, explain the situation.[4 marks]

http://www.physicslessons.com/qphysicsb.htm

Question 7

Diagram shows a coin is placed under a pyrex beaker.

http://www.dorjegurung.com

Why does the coin disappear from view when water is poured into the beaker? Explain your answer by using ray diagrams.

Question 8

A scuba diver training in a pool looks at his instructor as shown in the diagram below. By using a ray diagram explain the position of the instructor to the scuba diver view.

Question 9

Diagram 10.1 shows a light ray directed perpendicularly at a side of the semi circular glass block. The ray passes through the glass block to a point O before leaving the glass block. The angle of incidence in the glass block is 30.

Diagram 10.1 Explain how total internal reflection occurs in Diagram 10.1 above?[4 marks]

Question 10

Explain how you would estimate the focal length of a convex lens in your school laboratory .

Question 11

Diagram 8 shows an object, O with height 2 cm placed on the left side of a convex lens, X. The focal length of the convex lens is 10 cm.

Convex lens X

Object

(a) In Diagram 8 draw the ray path from the object to form an image.[2 marks](b) State the characteristics of the image formed. [1 mark](c) If the object is placed at a distance 30 cm from the lens, calculate:(i)the image distance.(ii) Linear magnification.[3 marks]

Question 12Nadia is farsighted with a near point of 100 cm. By using a ray diagram, explain how reading glasses is needed for Nadia to read a book at a distance of 25 cm? What is the power of the lens? Assume the lens is very close to the eye.[4 marks]

Question 13

You are given two convex lenses X and Y. The focal length of convex lens X and Y is 2.81 cm and 3.35 mm respectively. You are required to create a simple microscope using convex lenses X and Y.Draw the arrangement of the lenses and sketch the ray path using convex lenses X and Y to form a simple microscope in normal adjustment.

[4 marks]

5. Waves

Question 1

wooden bar P vibrates on a water surface of a ripple tank at a frequency of 5 Hz. The distance between three consecutive crests is 8.0 cm. The water wave produced is shown in the diagram below.

Determine the speed of waves

Question 2

Diagram shows that the glass breaks when a soprano singer sings.

Using the physics concept in (b), explain why it happens. [4 marks]

Question 3

Diagram shows a climber starts a stopwatch as he shouts. He hears an echo from the opposite side of the valley after 1.0s.

The sound travels at 340 ms-1. What is the width of the valley. ?

Question 4

Sound is produced by a vibrating object in a medium and propagates as a longitudinal wave in the medium.(i)Explain how a tuning fork produces sound waves in air.[2 marks]

(ii)Describe how you would show that sound waves are longitudinal waves.[2 marks]

Question 4

Diagram shows a water waves travelling from deep area to a shallow area.

(a)What type of wave is the water waves? [1 mark]

(b)Complete Diagram 2.1 to show the direction of propagation of the water waves in deep area and shallow area. Draw the waves patterns in both areas. [2 marks]

(c)Calculate the wavelength at deep area if the speed of water waves at shallow area and deep area are 4.0 ms-1 and 9.0 ms-1, respectively. The wavelength at shallow area is 2 m. [2 marks]

6. Electricity

Question 1

Diagram shows an electrical circuit. The reading of voltmeter V1 is 2 V.[Ignore the internal resistance of the cell]5 Nichrome wireV1V26 V

(i)State the reading of voltmeter V2.(ii)Calculate the current in the circuit.(iii)What is the resistance of the nichrome wire?[5 marks]

Question 2

Diagram (a) shows the structure of a hair dryer with two speed control switches. Diagram (b) shows the circuit diagram in which its components are connected in a combination of series and parallel circuits.

Heating elemenFan Switch B Switch A Main switch To power supply

Diagram (a)

Diagram (b)

(a). What is effective resistance ? [1 mark]

(b). Explain the advantages of parallel circuits in our household electrical appliances. [4 marks]

(c) (i). Based on Diagram 12.2, what is the purpose of connecting the resistor, R in series with the fan ? [1 mark]

(ii). Based on Diagram 12.3, what are the readings of effective resistance when only switch A is closed and when both of switches are closed ? [4 marks]

ARF = 20 R = 10 Switch BRHE = 20 Switch A24 V

Diagram 12.3

Question 3

Diagram shows a burning candle is placed in an electric field between two metal plates.

(a) On Diagram below draw the shape of the candle flame observed in the electric field.

(b) Explain why the shape of the candle flame observed as drawn in answer (a).[2 marks]7. Electromagnet

Question 1

Diagram shows a simple loudspeaker

(a) What is aLoudspeaker? (b) Explain how does aloudspeakerproduce sound

Question 2

Explain what happens to the copper wire when the dc power supply is switched on.

Question 3

Diagram shows a simple dynamic microphone

(c) What is amicrophone? (d) Explain how doesthe dynamic microphone uses a wire coil and magnet to create the audio signal.Question 4

Diagram (a) and Diagram (b) show a bar magnet is pushed into a solenoid at a speed of 2 ms-1.

Diagram (a)Diagram (b)

(a) Explain why the pointer of the galvanometer deflected when the magnet is pushed into the solenoid[4 marks](b) Explain why the deflection of the galvanometer is bigger in Diagram (b)[4 marks](c) What will happen if the speed is increased to 3 ms-1. Explain your answer[4marks](d) Why the direction of the current is upward as shown in the diagram? Explain

Question 5

Diagram shows a direct current generator

Explain how the above generator works to produce direct current. [4 marks]

8. Electronic

Question 1

Diagram (a) shows a circuit with transistor which is used as an amplifier.

microphonecapacitorspeaker 6 VR2=1000YZXR1

Diagram (a)

(a) Explain how is the audio from the microphone can be amplified? [4 mark] (b) What is the maximum value for resistor R1 for the transistor to function? (V YZ is 1 V ) [3 marks]

Question 2

Given :

(i)(ii)QABXPABX

(iv)(iii)

SABXRABX

(a) Diagram (a) shows the combination of two logic gates S.

KLS

MS

Diagram (a)

Combination of two logic gates above will produce single logic gate M. Complete the truth table in Table (a) for the combination of logic gates in diagram (a). Name the logic gate M[2marks]KLM

00

01

10

11

Table (a) . [1 mark]

(b)Draw the combination of two logic gates Q to produce a logic gate OR.[ 1 mark ]

(c)Arrange the logic gates P, Q and R inside the box provided in diagram (b) so that the output produced is the same as the output in the truth table in Table (b).[3marks]

PXQABRInputOutput

ABX

001

010

100

111

Table (b)Diagram (b)

Question 3

Diagram (a) shows a wave is formed on a Cathode-Ray Oscilloscope (CRO).

Explain how the CRO can be used to measure the potential difference of a dry cell. [ 4 marks ]

Diagram (a)

Question 4

Diagram (a) shows a fire alarm circuit using a transistor PQRas a switching divice.

Bell

DIAGRAM 10

Resistor T is a thermistor. When detected heat, resistance at T become 3.5 k. The transistor will be functional if the potential difference between Y and Z exceed 3.2 V.S is a fixed resistor with resistance of 6 k. Explain the operational of the circuit and verify whether the bell rings or not when there is a fire burning.[4 marks]

Question 5

Transistors is an important device in electronics. Transistors can be use as a current controller or automatic switching. An engineer wants to invent an automatic switching circuit to control an air conditioner. This air conditioner will switch on during hot wheather and switch off during cold wheather.(a) Draw the circuit diagram .[2 marks]

(b) Explain the operation of the circuit and how the circuit works during the hot weather[4 marks](c) Explain how the circuit works during cold weather [4marks]

Question 6

Diagram shows an electrical circuit to detect temperature of water whilst boiling an egg. When the egg is ready to serve, the siren will go off and the base voltage, Vb is at least 1.5 V.

Diagram (a)If the siren is functional(a) what is the maximum potential difference across R1? [1 mark](b) Calculate the resistance of the thermistor . Given the value of R1 is 600 .[2 marks] (c) Calculate the collector current, IC, if the emitter current, IE is 100 mA.[2 marks]

9. Radioactivity

Question 1

Location of leakageWater pipe 1 m

Diagram (a)

Diagram (a) shows an underground water pipe which has a leak.Leaks in underground water pipes can be detected using radioactive sources.Explain how a technician can trace the leakage point based and the characteristics of the ray chose. [5 marks]

Question 2

Carbon-14 is a radioisotope. Explain how Carbon-14 can be used to estimate the age of a dead plant, which contain carbon.[5 marks]

Question 3

In a nuclear reactor, 3.5 x 10 -6 g of Uranium is change into energy in 1.5 ms. Given that the velocity of light, c = 3 x 108 ms -1.

Calculate (a) the total energy released.[2 marks](b) the power generated by this reaction.[2 marks]

Question 4

The following equation shows a fission reaction of Uranium-235.

(a) Nuclear fission produces a chain reaction.Describe how the chain reaction occurs in a nuclear fission of an atom of Uranium- 235.[4 marks](b) The nuclear energy produced in the fission reaction of uranium-235 is 2.9 x 10-11 J.Calculate the total lost of mass in the reaction. [ c = 3.0 x 108 ms-1][2 marks]

Question 5

Diagram(a) is part of the decay curve for a sample of an -emitting radioactive isotope.

Diagram (a)

Based on Diagram (a)

(a) Determine the half-life of the isotope.[2 marks](b) Complete the curve in Diagram (a) as far as time = 20 days. Plot the exact corresponding values of the percentage activity and time.[3 marks]

Question 6

Radioactive source emitting ray is usedto detect the thickness of aluminium plate in a factory With the aid of a diagram, explain how the thickness of the aluminium plate can bedetected..[4 marks]

SECTION C

Basic Mathematics / Science Skill

1. Prefix and Physical Unit

(a) Write the following physical quantities in the unit given.

(i) 1 m2 = . cm2

(ii) 5 m3 = . cm3

(iii) 8 cm 2 = . m 2

(iv) Speed of the car = 120 km j1 = . m s1

(b) An object moves along straight line for time t. The length of the line, s is given by the equation

.What is the SI unit for g?

2. Understanding Measurements Sensitivity, Precision and Accuracy(a)Measuring instrumentSmallestscale divisionAccuracyMeasurement

metre rule

venier callipers

..

micrometer screw gauge.

(b)In a shooting competition, three participants A, B and C each take six shots at a target.. A C B

Compare the precision and the accuracy of three shooters From the diagram,i) Whose shots are more consistence (precise)? ..ii) Whose shots are more accurate?..(c)The consistency of measurement: Example:Reading P24 g24 g25 g

Reading Q24 g26 g27 g

Reading P has higher / less * consistency than Reading Q

(d)The accuracy of measurement: Example:The acceleration due to gravity = 9.81m s-2The experimental value:R - 9.76 m s-2S - 9.62 m s-2Reading R is ..accurate than Reading S.3. Graph

a. The relationship between two physical quantities

(i) (ii)

Time, t (s)Velocity (v)Time, t (s)Velocity (v)

(ii) (iv)

Time,t (s)Velocity (v)Time,t (s)Velocity (v)

b. The graph shows the relationship between v and t. What is the equation represents the relationship between v and t ?

c. Determine the gradient of the graph

(i) OP(ii)PQ

END OF PERFECT SCORE MODULE

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