bengkel teknik menjawab spm 2016.pdf

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    BENGKEL SCORE A+

    PHYSICS PAPER 2SPM 2016

    http://e/Bahan%20fizik/P&P%20power%20point/check%20list%20physics/program%20teknik%20menjawab%202016.pptx#1.%20PowerPoint%20Presentation
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    Diagram 1 shows a thermometer is used to

    measure the temperature of hot water.

    (i) Name one type of liquid

    used in the thermometer.

    [1 mark]

    (ii) Give one reason for the

    answer in 1(a)(i).

    [1 mark]

    1

    Mercury / alcohol

    expand uniformly / does

    not stick to glass / opaque

    / high boiling point

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    (i) Complete the following

    sentence by ticking () the correct

    answer.

    The temperature of water is taken

    when the liquid in the

    thermometer

    .. starts to expand.

    .. stops expanding [1 mark]

    (ii) Name the physics principle

    involved in 1(b)(i).

    .

    [1 mark]

    X

    Thermal equilibrium

    1

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    Diagram 2 shows an instrument which isused to measure atmospheric pressure.

    (a) Based on Diagram 2,

    (i) Name the instrument which is usedto measure the atmospheric pressure.

    .

    (ii) State one reason why mercury isused in the instrument.

    Barometer

    Higher density // opaque

    // non stick

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    (b) Based on Diagram 2,

    (i) State the atmosphericpressure in the unit of cm Hg.

    Calculate the atmospheric

    pressure in the unit of Pascal.[Density of mercury = 13.6 x 103

    kg m-3]

    76 cm Hg

    P = gh

    = 13600 x 10 x 0.76

    = 1.034 x 105 Pa

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    Diagram 3.2 shows the electromagneticspectrum.

    (a) State the electromagnetic wave R.

    ..........................................................................

    [1 mark]

    Give one reason why microwave is used in

    satelite communication.

    ..........................................................................

    [1 mark]

    Gamma ray

    Higer frequency / higher energy, shorter

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    A radio station emits radio wave at a

    frequency of 100 MHz.

    (i) State the frequency in the unit of Hz.

    (ii) Calculate the wave length of the radio

    wave.[speed of radio wave is 3 x 108 m s-1]

    [2 marks]

    100 x 106 = 1 x 108

    v = f = 3 x 108 / 1 x 108

    = 3 m

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    Diagram 4 shows ice cubes are being heated

    by 600 W immersion heater for 60 seconds.

    The melting ice cubes are collected in abeaker. The specific latent heat of fusion is

    3.3 x 105 Jkg-1

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    (a) What is the meaning of specific latent

    heat of fusion?

    The amount of heat required to melt 1 kg ofsolid without any change of temperature

    (b) Explain why the temperature does not

    change when the ice cubes changes to

    liquid.

    1st : Energy is used to overcome the binding

    force between molecules

    2nd : The kinetic energy does not change

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    Calculate

    (i) The energy absorbed by the ice cubes.

    [1 m]E = Pt = 600 x 60

    = 36000 J

    (ii) The mass of ice cubes which have melted.[2 marks]

    Pt = mL

    m = 36000/3.3 x 105 = 1.09 x 10-1 kg

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    Diagram 5.1 and Diagram 5.2 show the ray

    diagram of a man standing at two differentdistances in front of a concave mirror.

    5

    What is the

    characteristic of theimage formed in

    Diagram 5.1? Tick

    () the correctanswer in the box

    provided

    Real image

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    (b) Observed Diagram 5.1 and Diagram 5.2.

    (i) Compare the object distance

    (ii) Compare the image distance

    (iii)Compare the size of the image

    Object distance in Diagram 5.1 is longer

    Image distance in Diagram 5.1 is shorter

    Size of image in Diagram 5.1 is smaller

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    (c) Based on the answer in 5(b),

    (i) State the relationship between object

    distance and the image distance.

    (ii) State the relationship between object

    distance and the size of the image.

    Object distance larger, image distance

    shorter / inversely proportional

    Object distance longer, size of the image smaller

    / inversely proportional

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    (d) Diagram 5.3 shows a parabolic dish that is

    used to receive signals from a television

    station.(i) Where should the

    receiver be placed to

    obtain the strongest

    signal?

    (i) Give one reason for youranswer in 5(d)(i).

    At the focal point / F

    The object is at infinity / very far away @ parallel

    signal is reflected / converge at focal point

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    Diagram 6.1 shows the wave pattern when

    water wave moves from region A to region B

    in a ripple tank.

    6

    Diagram6.2 shows the cross-section of a ripple

    tank. The wavelength of the water changes asit moves from region A to region B.

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    (a) What is the meaning of wavelength?

    The distance between two successive pointswhich are inphase.

    @ Distance between two consecutive crests

    or trough

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    Based on Diagram 6.1 and Diagram 6.2,

    (i) Compare the wavelength between region A

    and region B.

    (ii) compare the incident angle, 1 and refracted

    angle, 2.

    (i) compare the depth of water between regionA and region B.

    Wavelength in region A is longer

    Incident angle is larger than refracted angle

    depth of water in region

    A is deeper

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    (c) Based on answers in 6(b),

    (i) state the relationship between the depth of

    water and the wavelength.

    (i) Complete the sentence below.

    As the depth increases, the wavelength

    increases

    When water wave travels from a deep to

    a shallow region, the direction of

    propagation is refracted towards the

    normal.

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    (d) Explain why most beach resorts are built at

    the bay area compared to the headland.

    1st : The energy of the wave spread at the

    bay /the wave refracted towards the

    normal2nd : calmer sea / smaller amplitude

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    A student is running a 200 m event. Diagram 7

    shows the distance-time graph to illustrate hisrunning.

    7

    (a) Tick () the correct answer in the box

    provided.

    Distance is a Scalar quantity

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    (i) Based on Diagram 7, calculate the speed of

    the student at section AB.

    7

    (ii) Compare the speed of the student at

    OA and AB.

    (200 100)

    24 - 14

    = 10 ms-1

    Speed OA < speed AB

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    Based on the following aspect, give

    suggestions on how the running time for 200

    m event can be shortened.(i) The students attire:

    Reason:

    (ii) The students shoe:

    Reason:

    (iii) The equipment used at the starting line

    Reason:

    Tight

    Reduce air resistance

    Spike shoe /stud

    Better grip

    Starting block

    Increase forward force /

    momentum

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    Diagram 8.1 shows a metal coated polystyrene

    ball hang between two metal plates, R and S.

    The metal plates are connected to an ExtraHigh Tension, E.H.T. supply. A strong electric

    field between metal plates R and S is produced

    when the switch is on.

    8

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    (a) What is the meaning of electric field?

    (a) When the metal coated polystyrene ball

    oscillates between the two plates for 3

    minutes, 0.3 A of current flows in the circuit.Calculate the total charge transferred

    between the two plates.

    A region where electric charges experience

    forces

    Q = It = 0.3 x (3 x 60) = 54 C

    Th f f ill ti f th t l t d

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    The frequency of oscillation of the metal coated

    polystyrene ball can be increased by using one

    of the method listed in Table 8.1.

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    Based on Table 8.1, state the suitable method to

    increase the frequency of oscillation.

    (i) Diameter between the two plates:

    Reason:

    (ii) Mass of the metal coated polystyrene ball:

    Reason:

    (iii) Voltage of E.H.T. supply:

    Reason:

    Short distance

    Oscillates in short time / faster

    Low mass

    Increase the acceleration / speed

    High voltage

    Increase electric field

    Based on the answers in (c)(i), (c)(ii) and

    (c)(iii), choose the most suitable method to

    increase the frequency of oscillation. Z

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    (e) The nylon thread in Diagram 8.1 is replaced

    with a copper thread.

    (i) What happen to the motion of the metal

    coated polystyrene ball?

    (i) Give a reason for your answer in (e)(i).

    stationary

    No charge on the metal coatedpolystrene ball // charge is earthed

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    Diagram 9.1 and Diagram 9.2 show two toy

    boats are separated at two different distances

    to each other due to the difference in pressure.In Diagram 9.1, the end of the rubber hose is

    pressed to reduce the size of the hose nozzle.

    (a) What is the meaning of pressure?

    Force per unit area //

    force/area

    9

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    (b)(i) Using Diagram 9.1 and Diagram 9.2,

    compare the speed of water spurting out from

    the rubber hose and the distance of separationbetween the toy boats.

    Speed of water that spurst out in Diagram

    9.1 is higher

    The distance of separation between the

    two toy boats is Diagram 9.1 is shorter

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    (b)(ii) State the relationship between the speed

    of water spurting out and the distance of

    separation between the toy boats to make adeduction regarding of relationship between

    the speed of water and pressure.

    .

    The higher the speed of water, theshorter the distance of separation

    The higher the speed of water, the lower

    the pressure

    (iii) Name the physics principles involved.

    Bernoullis principle

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    (c) Diagram 9.3 shows a cross section of a

    Bunsen burner. Using the physics principle,

    explain how a complete combustion can beproduced by the Bunsen burner.

    [4 marks] The gas from the gas tank flow in the

    bunsen burner At the nozzle, the velocity of gas flows is

    very high

    A region of low pressure is produced at

    the nozzle

    Air is sucked in

    The mixture of gas and air

    producing complete combustion of gas

    (d) Diagram 9 4 shows a hydrometer which is

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    (d) Diagram 9.4 shows a hydrometer which is

    used to measure density of a liquid.

    You are required to modify the design in Diagram

    9.4 so that the hydrometer is more sensitive andcan measure wider range of liquids density.

    State and explain the modifications based on the

    following aspects:(i) Length of the stem

    (ii) Material of the hydrometer

    (iii) Diameter of the stem(iv) Size of the bulb

    (v) Number of lead shots

    [10 marks]

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    longer

    Wide / big range // sensitive // small

    scale division Plastic // glass

    Avoid corrosion

    Small diameter // narrow

    increase sensitivity / detect small change

    Big bulb

    Bouyant force / more weight of water

    displaced

    More number of lead shorts

    Stable // balance

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    Diagram 10.1(a) and Diagram 10.2(a) show two

    identical Van de Graaff generators being charged for 1

    minute and 5 minutes respectively. Diagram 10.1(b)

    and Diagram 10.2(b) show the deflection of themicroammeter pointer when the metal dome is

    connected to the microammeter and a metal tap.

    What is the physical quantity that can be measured

    by a microammeter? [1 mark]Current

    10

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    (i) Using Diagram 10.1 and 10.2, compare the time

    taken to charge the Van de Graaff generator, quantity

    of charge produced on the dome and the angle of

    deflection of the microammeter pointer.

    The time taken to charge the Van de Graaff generator in

    Diagram 10.2(b) is longer (vice versa)

    2 The quantity of charge produced on the dome in

    Diagram 10.2(b) is greater (vice versa)

    3 The angle of deflection of the micrometer pointer in

    Diagram 10.2(b) is greater (vice versa)

    10

    (ii) State the relationship between:

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    (ii) State the relationship between:

    *The time taken to charge the Van de Graaff generator

    and the quantity of charge produced on the dome.

    *The quantity of charge produced on the dome andthe current produced. [2 marks]

    4 Time increase, charge increase // time charge // Q

    t // q t // Q = It //graph

    5 charge increase, current increase

    10

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    (c) Diagram 10.3 shows a filament lamp. Explain why

    the filament in coiled shape produces more light.

    1

    Length high / long / increase2 high resistance / resistivity / R /

    3 (produce / release) heat /energy / power //

    E = I2Rt / (V2/R)t // P = I2R / P = (V2/R)

    4 heat to light // Electric light // Electrical light // heat light

    10

    10

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    (d) Diagram 10.4 shows the design of a wire-wrapped variable

    resistor made by a student to control the amount of current

    flowing through a circuit. The resistance of the variable resistor

    can be varied to a maximum of 10 .You are required to modify the design in Diagram 10.4 so that the

    maximum resistance is greater than 10 . State and explain the

    modification based on following aspects:

    (i) Cross-sectional area of wire used.

    (ii) Length of wire used

    (iii) Number of turns of the wire

    (iv) Conductivity of the slider

    (v) Type of wire used.

    [10 marks]

    10

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    Small cross sectional

    areaHigh resistance

    Longer wire To increase number of turnswrapped / High resistance

    5

    Higher number ofturns of wrapped wire

    6 To increase the maximum

    resistance // increase resistance

    High conductivityTo allow current flow from the

    terminal to the coil

    Brass / nichrome /

    constantanHigh resistance

    10

    http://d/Bahan%20fizik/Question/CD/MENU%20UTAMA%20CD.pptx#4.%20PowerPoint%20Presentation
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    Induced current

    The strength of

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    The strength of

    magnetic field of the

    bar magnet is same

    The number of turns ofthe coil in 10.2 is

    greater

    The deflection of thegalvanometer pointer

    in 10.2 is greater

    The number of turns of the

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    The number of turns of the

    coil is directly proportional

    to the size of deflection of

    the galvanometer pointer The number of turns of the

    coil is directly proportional

    with the rate of change of

    magnetic flux. The rate of change of magnetic

    flux is directly proportional to

    the magnitude of induced

    current

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    Rotate the coil

    Magnetic flux is cut by thesolenoid

    Induced current is

    produced

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    / d

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    copper Low resistance / good

    conductor

    Thick wire Low resistance

    5 soft iron core6 easy to magnetized and

    demagnetized // reducehysterisis

    Laminated coreReduce eddy current

    Closer

    Wind secondary coil on

    top of the primary coil

    Reduce leakage of magnetic

    flux

    10

    http://d/Bahan%20fizik/Question/CD/MENU%20UTAMA%20CD.pptx#4.%20PowerPoint%20Presentation
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    Distance/time

    360 x 103 / 3600 = 100

    (100 0)/10 = 10 ms-2

    0(10) + (10)(10)2 = 500 m

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    1 Low density of material

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    1. Low density of material

    2. Light / smaller mass / small inertia

    3. aerodynamic

    4. Less air frictional force

    5. superconductor

    6. Zero resistance / no energy loss

    7. 8 short coaches

    8. Reduce the effect of inertia / can easily make aturn at the sharp end

    9. Choose L10.Low density material, aerodynamic shape,

    superconductor is used to make the magnetand 8 short coaches of fast train.

    Explain how to move with

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    Explain how to move with

    a constant velocity:

    1. Drag = engine thrust

    2. Resultant force = 0

    Explain how to move withan acceleration

    1. Engine thrust > Drag

    2. Resultant force is not

    equal zero / F = ma

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    Diagram 11.1 shows a man standing infront of a

    curve mirror with his image shown in the mirror.

    (a)(i) State a light phenomenon involved in theformation of the image.

    Reflection of light

    (b) Draw a ray diagram on Diagram 7 1

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    (b) Draw a ray diagram on Diagram 7.1

    to show how the image is formed.[3 marks]

    Image

    1. A ray from object parallel to

    its principal axis, reflects to F

    2. A ray passing through C, will

    reflect at the same path, C

    3.Extrapolation

    of both rays to

    form image

    http://d/Bahan%20fizik/Question/CD/MENU%20UTAMA%20CD.pptx#2.%20PowerPoint%20Presentation
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    (ii) Based on Diagram 11.1 explain how a

    magnified image of the man is formed by the

    curved mirror. Concave mirror is used

    u < f

    Reflection of light formed a virtual image

    v > u

    m = v/u > 1

    Height of image is bigger than height ofobject

    Curved mirrors are always used as security mirror

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    y y

    in shops to watch our for shop-lifter.

    You are required to investigate the characteristics

    of curved mirrors as shown in Table 11.Explain the suitability of each characteristic of the

    curved mirror to be used as an effective security

    mirror. Determine the most suitable curved mirrorthat can be used as a security mirror. Give reasons

    for your choice.

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    Convex mirror

    Larger view of vision / wide field of view

    Big diameter more light / brighter image formed

    High position

    Wider coverage / wide view / no obstacle

    Strong reflector

    good reflection / clear image / sharp image

    Choose S

    Because it is convex mirror, big diameter,high position and strong reflector

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    Diagram 11.2 shows the formation of an

    image by a convex lens. The focal length of

    the lens is 6 cm and the height of the objectis 2 cm. Calculate

    (i) The power of the lens.

    (ii) The image distance.(iii)The height of the image.

    P = 1/f = 1/0.06 = 16.67

    (ii) 1/f = 1/u + 1/v

    1/v = 1/6 1/9 = 9 6

    54

    v = 18 cm

    (iii) m = 18/9 = h/2 = 4