BAHAGIAN A No Mark Scheme Sub Mark Total Mark 1(a)

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1

PEPERIKSAAN PERCUBAAN SPM

TAHUN 2018

MAJLIS PENGETUA SEKOLAH MALAYSIA (KEDAH)

FIZIK

Kertas 2

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2

No Mark Scheme Sub

Mark

Total Mark 1(a) State the meaning of velocity correctly

Rate of change of displacement 1 1

(b) (i) Tick the correct box

Zero acceleration 1

3 (ii) Show the correct substation

s = 1

2 (8+4) (2.0)

Answer with correct unit 12.0 m

1

4

2(a) Tick the correct box

Longitudinal wave 1 1

(b) (i) Mark the rarefaction region correctly

X at correct place 1

4 (ii) Calculate the wave length correctly

λ = _3.514 = 4.0 cm 1

(iii) Show the substituition correctly v = f λ = 2 x 4.0

Answer with correct unit 8.0 cm s-1

1

5

3(a) Name the logic gate correctly

OR gate 1 1

(b) Draw the circuit diagram correctly

2 parallel switches

Corrent arangement of light bulbs

1

1 2

(c) Complete the output X corrently X = 0, 1, 1, 1

4 correct answer - 2 marks

2-3 corrent answer - 1 mark 2 2

(d) State the electrical component correctly

HDR / Thermistor 1 1

6

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3

Mark

Total Mark 4(a) (i) Draw the arrangement correctly

1 1

(ii) State the wave phenomenon correctly

Total internal reflection 1 1

(b) (i) _{State the meaning correctly}

The angle of incidence in the denser medium when the angle of

reflection is 900 ₁

5 (ii) _{Calculate the critical angle correctly}

n = 1

sin 𝑐

c = 41.810

1

1 (iii) Complete the ray and label the image, I, correctly

1+1

7

5(a) State the meaning of electric field correctly

A region which a charge experiences an electric force 1 1 (b) (i) Compare the voltage of the power supply

Diagram 5.1 > Diagram 5.2 1

3 (ii) Compare the electric field strength

Diagram 5.1 > Diagram 5.2 1

(iii) Compare the speed correctly Diagram 5.1 > Diagram 5.2

1

(c) (i) Relate the voltage and the electric field strength

The higher the voltage, the higher the electric field strength 1

2 (ii) Relate the electric field strength and the speed of the ball

The higher the electric field strength, the higher the ball’s speed 1 (d) Explain the observation correctly

-The bigger portion of the flame attracted to the negative terminal plate / plate Q

-due to its higher mass of positive ions of air molecules.

1

1 2

8

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4

Mark Mark

6(a) State the meaning correctly

Light with single colour // One wave length // One frequency 1 1 (b) (i)

(ii)

Tick the boxes correctly Constructive

Wave length of blue light < wave length of red light 1 (iii) State the relationship correctly

The smaller the distance between 2 consecutive bright fringes, x,

the smaller the wave length 1

(d) Arrange the value of x corrently xB, xG, xR

1 1

(e) State the changes correctly

Rainbow / light spectrum is seen 1 1

8 7(a) (i) State the meaning correctly

Elastic limit is the maximum applied force whereby the spring will return to its original length

1

4 (ii) Show the substitution corrently

K = _m1 = 2₅

Answer with correct unit 0.4 N cm-1

1

2

(b) (i) State the elastics limit and reason correctly Higher elastic limit

Can support greater force

1 1

6 (ii) State the stiffness of the spring and reason correclty

Higher stiffness Higher spring constant

1 1

(iii) State the diameter of the spring wire and reason correctly Larger diameter

Higher spring constant/can support greater force

1 1

₁₀

√

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5

Mark

Total Mark 8(a) State the meaning correctly

Heat required to increase temperature 1o_{C for 1 kg of mass.} ₁ ₁

(b) Show the correct direction

2 2

(c) Explain the phenomenon correctly

- Land has low specific heat capacity // Land heat up faster - Hot air less dense rises up

- Cool air moves towards land Any 2 2

(d) (i) State the stopper correctly Hollow plastic

State the reason correctly

Prevents heat from escaping the thermos flask.

1

6 (ii) State the double wall correctly

Vacuum

Less heat will lost through conduction..

1

1 (iii) State the space correctly

Glass

To prevent heat transferred out of the thermos flask through conduction and convection.

1

(e) State the most suitable thermos flask correctly

Q 1

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6

Mark

Total Mark

9(a) State the meaning of pressure correctly

Force per unit area 1 1

(b) (i) Compare the area of pistaons correctly

The area of the piston B > piston A

Compare the forces correctly

The force acting on the piston B < piston A

Compare the pressure correctly

Pressure of liquid in the piston B = piston A

1

5 (ii) State the relationship between area and force correctly

The larger the area of piston, the larger force acting on the piston 1 (iii) Name the principle correctly

Pascal’s Principle 1

(c) Explain how the hydraulic jack can lift up a vehicle correctly

M1 The force applied to the small piston produces pressure

M2 Pressure transmitted equally throughout the liquid.

M3 The area of piston A is lower than piston B.

M4 A greater force is produced

1 1 1

1 4

(d) (i) M1 State the size of tyre correctly

Used large / chain steel tyre

M2 State the reason for M1 correctly

Lower pressure/ not easy to embedded in the soil

1 1

10 (ii) M3 State the strength of the shovel correctly

Strong Shovel

Not easy to break / long lasting

1 1 (iii) M5 State the density of fluid correctly

Lower density of fluid

M6 State the reason for M5 correctly

Good lubrication

1 1

M7 State the characteristics of the fluid correctly

Incompressible fluid

Transfer pressure efficiently

1 1 (iv) M9 State the ratio of the area correctly

High ratio of area output piston and small piston

Higher output force.

1 1

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7

Mark

Total Mark 10(a) State the physical quantity correctly

Current 1 1

(b) (i)

(ii)

Compare the velocity and the angle correctly M1 Velocity 10.2 ˃ Velocity at 10.1

M2 Angle 10.2 ˃ Angle 10.1

State the relationship between the velocity and the angle of deflection correctly

The higher the velocity, the greater the angle of deflection State the relationship between the velocity and the rate of cutting of magnetic flux correctly

The higher the velocity, the higher the rate of cutting of magnetic flux

State the relationship between rate of cutting of magnetic flux and the magnitude of induced current

The higher the rate of cutting of magnetic flux, the higher the magnitude of induced current

1 1

1

1 5

(c) Explain the deflection of pointer of galvanometer correctly M1 Galvanometer pointer deflects.

M2 When bar magnet is moved towards the solenoid,

magnetic flux linkage occur/ cutting of magnetic field lines M3 Emf is induced in the solenoid.

M4 Induced current flows in the circuit through galvanometer

1 1

1

1 4

(d) M1 State the thickness of diaphragm and reason correctly Thinner diaphragm

M2 State the reason for M1 correctly Easy to vibrate

M3 State the elasticity of diaphragm and reason correctly High elasticity

M4 State the reason for M3 correctly Easy to vibrate

1

10 M5 State the thickness of voice coil and reason correctly

Thick voice coil

M6 State the reason for M5 correctly Low resistance

1 1

M7 State number of turns of voice coil and reason correctly Greater number of turns

Increase rate of cutting of magnetic flux// increase induced e.m.f. 1

1 M9 State the strength of magnet and reason correctly

Strong magnet/ High strength

Increase rate of cutting of magnetic flux// increase induced e.m.f. 1 1

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No Mark Scheme

Mark Mark 11(a) (i) State the meaning correctly

Reciprocal of focal length / Power = 1 Focal length

1

5 (ii) Explain the procedure correctly

M1 Facing the convex lens on lens holder to a distant object M2 Placed a screen on the opposite side of the lens to object M3 The screen is adjusted forth and back until a sharp image

is formed

M4 Distance between screen and centre of the lens, f is measured

M5 The power of lens = 1

Focal length Max 4

(b) M1 State the power correctly

The power of objective lens should be low M2 State the reason for M1 correctly

Higher magnification

M3 State the diameter correctly

Bigger diameter of the objective lens M4 State the reason for M3 correctly

To receive more light rays

M5 State the length of the optical path, L correctly L = fo+ fe

So that the final image is formed at infinity

M7 State the component between two lenses correctly Two right angle isosceles prisms

Four times of total internal reflection occur // Smaller size of binocular

M9 Choose of correct binocular Binocular R

M10 State all the reasons for M9 correctly

Combination of (M1, M3, M5, M7) // (M2, M4, M6, M8)

Calculate the distance between lenses correctly L = 40 + 7.14 = 47.14 cm

1

5 (ii) Show the correct substitution and answer correctly

Magnification = Pe

(iii) State the effect on the image correctly

The final image is diminished 1

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9

Mark

Total Mark 12(a)(i) State the meaning of beta correctly

High speed electron emitted from radioactive decay 1

5 (ii) State the film correctly

P 1

(iii) State the reason for (ii) correctly Beta particle penetrate into region P

Beta particle can be blocked by aluminium and lead

1 2 (b) M1 State the type of radiation correctly

Gamma ray

M2 State the reason for M1 correctly Can be detected from outside the body M3 State the state of matter correctly Liquid

M4 State the reason for M3 correctly Easy and fast absorption into the blood stream M5 State the half life correctly

Short half life

M6 State the reason for M5 correctly Deplete faster from the body

M7 State the type of detector correctly GM tube

M8 State the reason for M7 correctly Better detector

Calculate the energy released correclty Energy = 8.68014 x 10-30_{x (3 x 10}8₎2