4531

PERSIDANGAN KEBANGSAAN PENGETUA-PENGETUA SEKOLAH MENENGAH NEGERI KEDAH DARUL AMAN

PEPERIKSAAN PERCUBAAN SPM 2009

PHYSICSPERATURAN PEMARKAHAN

Peraturan pemarkahan ini mengandungi 16 halaman bercetak

4531

2

PEPERIKSAAN PERCUBAAN SPM 2009 KEDAH DARUL AMAN PERATURAN PEMARKAHAN

PHYSICSPAPER Paper 1 Paper 2 Paper 3 Total MARKS 50 100 40 190

Jumlah markah diskalakan kepada 100%PHYSICS Paper 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 C D D B D A B A D C B D C C A D A D C D B A A C B 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 B B A C A C B C D A D B A A A D B A B B B A C B A

3 PHYSICS Paper 2 SECTION ANO. 1 (a) (i) MARKING CRITERIA State the physical quantity correctly - Voltage/potential difference State the error correctly - Zero error//systematic error State the instrument correctly - Y/micrometer State the reason correctly - The scale has a smaller division State the explanation correctly - energy is used to break the bonds//change the state of matter State the explanation correctly - energy is used to increase the kinetic energy of the molecules Correct substitution - 0.2 x 3.36 x 105 Correct answer and correct unit - 6.72 x 104 J Mark on the box correctly - There is no net transfer of energy between the water and the surroundings State the unit correctly - N m2 // kg m1 s2 State one factor correctly - depth//density Correct substitution - 1010 x 2.5 x 10 Correct answer and correct unit - 25250 N Show the substitution correctly - 125000 - 25250 Correct answer and correct unit - 99750 N MARK SUB TOTAL 1

(ii)

1

(b) (i)

1

(ii)

1 4 1

2(a)

(i)

(ii)

1

(b)

1 1

(c)

1 5

3(a)

1

(b)

1

(c) (i)

1

1 1

(ii)

1 6

4NO. 4(a) MARKING CRITERIA Name component T correctly - Thermistor//heat sensitive resistor Underline the words correctly - resistance decreases - IB increases Correct answer and correct unit - 0.08 s Correct substitution MARK SUB TOTAL 1

(b)

1 1 1

(c) (i)

(ii)

1

1 0.081

Correct answer and correct unit - 12.5 Hz (iii) Sketch the trace correctly - Sinusoidal with four complete cycles Compare the speed of light correctly - Speed of light is higher in air Compare the speed of light correctly - Speed of light is higher in air State the relationship correctly - If the speed of light decreases, then the light ray will bend towards the normal State the phenomenon correctly - refraction Draw the light rays correctly - At least one light ray from point P bend away from the normal after emerging into the air - Extrapolate the ray to point Q Correct substitution -

1 7 1

5(a)

(i)

(ii)

1

(iii)

1

(iv)

1

(b) (i)

1 1 1

(ii)

1.6 1.21 8

Correct answer with no unit in decimal - 1.33

5NO. 6(a) MARKING CRITERIA State the meaning correctly - Time for the activity of the radioactive substance to become half of the original activity // Time taken for half of the mass of radioactive substance to decay (i) State the half life correctly - X : 10 minutes - Y : 5 minutes MARK SUB TOTAL 1

(b)

1 1 1 1 1 1

(ii) State the answer correctly - X : 50 % - Y : 25 % (c) State the comparison correctly - The decay rates for substance X is slower//vice versa State the relationship correctly - The shorter the half life, the higher the decay rate (d) Give the reason correctly - Background radiation State the energy changes correctly - electrical energy to (gravitational) potential energy (i) Correct substitution - 1.7 x 10 Correct answer and correct unit - 17 W (ii) Correct substitution -

1 8 1

7(a)

(b)

1

1

1

2 x10 x1.5 2 .51 1

Correct answer with correct unit - 12 W (iii) Correct substitution

12 x 100% 17Correct answer with correct unit - 70.6 % (c) State the change on the ammeter correctly - ammeter reading decreases Give explanation correctly - less work done // less power required (d) Give one suggestion correctly - lubricate the moving parts to reduce friction 1 1

1

1

10

6NO. 8(a) (i) MARKING CRITERIA Name the law correctly - Hookes Law Mark a cross on each line correctly - All correct (2 marks) - 1 or 2 correct (1 mark) State the energy correctly - Elastic potential energy Determine the force correctly - From the graph, F = 60 N Correct substitution - (60)(8)// (60)(0.08) Correct answer with correct unit - 240 N cm // 2.4 J // 2.4 N m (c) (i) State the maximum weight correctly - 80 N Name the two springs correctly - Spring P - Spring Q Give the choice correctly - Spring Q Give the explanation correctly - More sensitive//smaller force constant MARK SUB TOTAL 1

(ii)

1+1

(b) (i)

1

(ii)

1

1

1

1

(ii)

1+1

(iii)

1

1 12

7 SECTION BNO 9(a) MARKING CRITERIA State the meaning correctly - Product of mass and velocity / /momentum = mass x velocity (ii) State the total momentum in Diagram 9.1 correctly - Zero Compare the total momentum correctly - Total momentum before the bullet is fired = total momentum after the bullet is fired. Compare the magnitude of the momentum of the bullet and pistol correctly - Equal Compare the direction of the momentum of the bullet and pistol correctly - Opposite Name the physics principle correctly - Principle of Conservation of Momentum MARK SUB TOTAL 1 1 1

1

1

1

1 5

(b)

Describe the propulsion of a rocket engine correctly - Liquid oxygen and liquid hydrogen/fuel is pump into the combustion chamber for combustion - The exhaust gas is ejected out of the rocket nozzle at high speed. - The ejected exhaust gas at high speed has a large momentum. - According to the Principle of Conservation of Momentum, the rocket acquires a large momentum forward State aspect of blade correctly - Using bigger blades/increase the number of blades/increase the speed of blade State reason for aspect of forces and motion correctly - Increase the air intake State aspect of material of blade correctly - Blade made of strong material State reason for aspect of material of blade correctly - Can withstand strong pressure/it will not break easily State aspect of fuel injector correctly - Increase the number of fuel injectors// add more fuel injectors State reason for aspect of fuel injector correctly - More fuel to be burnt to produce greater thrust

1 1 1 1

4

(c)

1

1

1

1

1

1

8State aspect of combustion chamber correctly - Increase the size of the combustion chamber State reason for aspect of combustion chamber correctly - More space for the fuel to be burnt State aspect of nozzle correctly - Decrease the diameter of the nozzle 1

1

1

State reason for aspect of nozzle correctly - Exhaust gas ejected at higher velocity/higher momentum

1

10

20

9MARK SUB TOTAL 1 1 1 1 1 1 1 1 1 4

NO 10(a) (i)

MARKING CRITERIA State the meaning correctly - A wave in which the vibration of particles in the medium is parallel to the direction of propagation of the wave. Explain the production of sound waves correctly - When a tuning fork vibrates, layers of air vibrate - The particles of air undergo s series of compression and rarefaction - Sound energy is propagated through the air in the form of waves Compare the amplitudes of the wave form correctly - The amplitude in Diagram 10.2 is higher Compare the peak values of the wave form correctly - The peak value in Diagram 10.2 is higher State the relationship between amplitude and peak value correctly - The higher the amplitude, the higher the peak value State the relationship between the peak value and loudness correctly - The higher the peak value, the louder is the sound. State the relationship between the loudness and the amplitude correctly - The higher the amplitude, the louder is the sound Suggest the type of frequency correctly - The boat must use high frequency sound waves Give the reason correctly - Smaller wavelength, less diffracted Suggest the type of energy correctly - High energy waves Give the reason correctly - High penetrating power Suggest the list of equipments needed for the measurement Transmitter Receiver Sound generator CRO [Any of the three above] State the method of measuring the time - The time taken, t from the transmitter to the receiver is recorded by the CRO - The speed of the sound wave, v in water is given - The depth of the sea, d =

(ii)

(b)

(i) (ii) (iii)

(iv)

1

(v)

1

5

(c)

(i)

1 1 1 1 4

(ii)

3

(iii)

1 1 1 3 20

vt 2

10 SECTION CNO 11(a) (i) MARKING CRITERIA State the explanation correctly - Temperature of the coolant decreases - Speed of the molecules decreases - Distance between molecules decreases State the explanation correctly - When coolant changes from a liquid to a gas, latent heat is required. - Latent heat is obtained from the interior of the refrigerator. State the specific latent heat of vaporisation and reason correctly 1 High specific latent heat of vaporization 2 Rate of heat removed is faster State the boiling point and reason correctly 3 Coolant with low boiling point 4 Easily can to vapour/gas State the specific heat capacity and reason correctly 5 Low specific heat capacity 6 Can be heat up (cool down) faster State the diameter and reason correctly 7 Big diameter 8 Can carry more coolant State most suitable choice of coolant and justification correctly Q Low specific latent heat of vaporization and low boiling point State most suitable pipe and justification correctly Z Low specific heat capacity and big diameter (c) (i) State the meaning correctly The quantities of heat required to change the temperature of 1 kg of water by 1 oC is 4200 J. Correct substitution 0.5 x 4200 x 30 Correct answer and correct unit 63 000 J (iii) Correct substitution 0.5 x 3.34.x 105 Correct answer and correct unit 1.67 x 105 J MARK SUB TOTAL 1 1 1

3

(ii)

1 1 1+1

2

(b)

1+1

1+1

1+1

1

1 10

1

(ii)

1 1 1

1

5 20

11NO 12(a) (i) MARKING CRITERIA State Lenzs Law correctly - The direction of the induced current is such as to oppose the change causing it. State the explanation correctly - The solenoid experiences a change in the magnetic flux/magnetic field (lines) - According to Faradays Law of electromagnetic induction - An e.m.f. is induced in the coil - X is north pole State the suitable number of turns of coil in the generator and reason correctly - High number of turns of coil - Larger force acting on the coil / higher electromagnetic field strength State the suitable strength of the magnets in the generator and reason correctly - High strength magnets - Larger force acting on the coil State the suitable arrangement of components in the rectification circuit - Using 4 diodes and a capacitor - 4 diodes to produce full-wave rectification and capacitor as a smoother State the suitable capacitance of the capacitor in the rectification circuit - Large capacitance - To produce a constant output voltage State most suitable choice of generator and justification correctly - Y and high number of turns of coil and high strength of magnets State most suitable choice rectification circuit and justification correctly - C, 4 diodes and a capacitor with high capacitance (c) (i) State the type of transformer correctly - Step-down transformer (ii) Correct substitution MARK SUB TOTAL 1

(ii)

1 1 1 1 1+1

(b)

1+1

1+1

1+1

1

1

1 1

(240)(150) 12Correct answer and no unit 3000 (iii) Correct substitution 1

24 100 (0.125)(240)Correct answer with unit 80% // 0.8

1

1 5 20

12 PHYSICS Paper 3 SECTION ANO 1(a) (i) MARKING CRITERIA State the manipulated variable correctly Angle of incidence / i State the responding variable correctly Angle of refraction / r // sin r State the constant variable correctly Glass block // Semicircular glass block // Refractive index Record the readings of r correctly Diagram 1.2 : 11o Diagram 1.3 : 20o Diagram 1.4 : 29o Diagram 1.5 : 36o Diagram 1.6 : 41o Note : 1. All 5 values correct 2 marks 2. 3 or 4 values correct 1 mark State the values of sin i correctly Diagram 1.2 : 0.2588 Diagram 1.3 : 0.5000 Diagram 1.4 : 0.7071 Diagram 1.5 : 0.8660 Diagram 1.6 : 0.9659 Note : 1. Accept e.c.f. from (b)(i) 2. All 5 values correct 2 marks 3. 3 or 4 values correct 1 mark 4. Not necessary to have consistent number of d.p. State the values of sin r correctly All 5 values of sin r correct Diagram 1.2 : 0.1908 Diagram 1.3 : 0.3420 Diagram 1.4 : 0.4848 Diagram 1.5 : 0.5878 Diagram 1.6 : 0.6561 Note : 1. Accept e.c.f. from (b)(i) 2. All 5 values correct 2 marks 3. 3 or 4 values correct 1 mark 4. Not necessary to have consistent number of d.p. MARK SUB TOTAL

1

1

(ii)

1

1

(iii)

1

1

(b)

(i)

2

2

(ii)

1

1

(iii)

2

2

13(c) Tabulate the results for i, sin i, r and sin r correctly i 15o 30o 45o 60o 75o sin i 0.2588 0.5000 0.7071 0.8660 0.9659 r 11o 20o 29o 36o 41o sin r 0.1908 0.3420 0.4848 0.5878 0.6561 1 1 2

Table with 4 columns correctly labelled sin i and sin r consistent to 2, 3 or 4 decimal places (d) Draw a complete graph of sin i against sin r Give a tick () based on the following: A sin i at the y-axis, sin r at the x-axis B Uniform scale at both axes C 5 points plotted correctly [Note : 4 points plotted correctly : ] D Straight line of best fit is drawn E Minimum size of graph 5 x 4 big squares (Big square : 2 cm x 2 cm) (From the origin to the last point) Marks awarded : Number of 6 45 3 2 1 (e) Marks 5 4 3 2 1

5 5 1 1 16

State the correct relationship between sin i and sin r sin i is directly proportional to sin r

14NO 2(a) MARKING CRITERIA (i) State the correct relationship IC increases linearly with IB // IC is directly proportional to IB (ii) Determine the value of IB correctly IB = 500 A Draw the extrapolation line to the point (500, 100) or beyond Draw the lines IC = 100 mA and IB = 500 A (b) (i) Calculate the gradient of the graph, m, and state the value of m - Draw a sufficiently large triangle - Correct substitution (Follow candidates triangle) - State the correct value 200 (ii) State the correct meaning The ratio of the change in IC to the change in IB // (c) MARK SUB TOTAL

1

1

1 1 1 3

1 1 1 3

I C I B

1

1

Determine the value of IE and state the correct value of IE - Intrapolation line from IB = 350 A to the given line and from the given line to the IC axis - State the correct value of IC IC = 70 mA // 70 000 A - State the correct value of IE 70.35 mA // 70 350 A

1

1

1

3

(d)

State one correct precaution - Position of the eyes such that line of sight is perpendicular to the scale of the meter to avoid parallax error - Current is switched off after readings are taken

1 1 Max 1 12 1

15 SECTION BNO 3 (a) (b) MARKING CRITERIA State a suitable inference The mass // volume affects the rise in temperature // temperature State a relevant hypothesis The greater the mass // volume, the smaller the rise in temperature // temperature Describe a complete and suitable experimental framework (i) State the aim of experiment To investigate the relationship between the mass and rise in temperature (of water) State the manipulated variable and the responding variable Manipulated variable : Mass Responding variable : Increase in temperature State the constant variable Constant variable : Heat supplied // Time of heating // Power of the heater // (iii) List out the important apparatus and materials Beaker, water, thermometer, immersion heater, stopwatch, balance for measuring mass Draw or describe a functionable arrangement of the apparatus State the method of controlling the manipulated variable Put a mass of 100 g of water in a beaker State the method of measuring the responding variable Switch on the heater for 5 minutes and record the temperature rise. State how the procedure is repeated to obtain at least 5 sets of results Repeat the experiment with 150 g, 200 g, 250 g, 300 g and 350 g of water. Tabulate the data Mass of water / g 100 150 200 250 300 350 (ix) Temperature rise / oC MARK SUB TOTAL

1

1

1

1

(c)

1

(ii)

1

1

1

(iv) (v) (vi) (vii)

1 1 1

1

(viii)

1 1 10

State how data will be analysed The graph of temperature rise against mass is drawn Note : Mark accordingly if the manipulated variable is volume .

12

16NO. 4 (a) (b) (c) MARKING CRITERIA State a suitable inference The distance / separation between the arms affect the distance / separation between the loud sounds State a relevant hypothesis The smaller the distance / separation between the arms, the greater is the distance / separation between the loud sounds Describe a complete and suitable experimental framework (i) State the aim of experiment To investigate the relationship between the separation between two loudspeakers and the distance between the position of the loud sounds (ii) State the manipulated variable and the responding variable Manipulated variable : separation between loudspeakers Responding variable : distance between position of loud sounds State the constant variable Constant variable : Frequency of the sound // wavelength of the sound // Distance of the line of observation to the loudspeakers (iii) List out the important apparatus and materials Two loudspeakers, signal generator, metre rule / measuring tape, (microphone, cathode ray oscilloscope) (iv) Draw or describe a functionable arrangement of the apparatus (v) State the method of controlling the manipulated variable The two loudspeakers are placed at a distance, a = 0.4 m apart. (vi) State the method of measuring the responding variable The positions of two successive loud sounds is determined and the distance, x, between them is measured with a metre rule (vii) State how the procedure is repeated to obtain at least 5 sets of results The procedure is repeated for the values of a = 0.8 m, 1.2 m, 1.6 m, 2.0 m and 2.4 m (viii) Tabulate the data a/m 0.4 0.8 1.2 1.6 2.0 2.4 x/m MARK SUB TOTAL 1 1 1 1

1

1 1

1 1 1

1

1

1 1 10 12

(ix) State how data will be analyzed A graph of x against a is drawn