SEKOLAH BERASRAMA PENUH
KEMENTERIAN PELAJARAN MALAYSIA
PEPERIKSAAN PERCUBAAN SIJIL PELAJARAN MALAYSIA 2016
PHYSICS Kertas 2
Mark Scheme
Ogos / September
1 (a) Reflection 1
(b) At P and is virtual 1
(c) Upright//same size//laterally inverted 1
(d) 8:00 1
TOTAL 4
2 (a) (i) Uniform acceleration / Velocity increases uniformly
Reject: acceleration / velocity increase
1 1
(ii) Gravitational potential energy--> Kinetic energy 1 1
(b) mgh = ½ mv2
(m) (10)(10)= ½ (m)v2
v = 14.14 m s-1
1
1 2
(c) no change 1 1
TOTAL 5
3 (a) Number of complete oscillation in one second. 1 1 (b) 1. Higher energy / short wavelength / less diffract
2. Travel further
1
1
2
(c) 1. Time between source and rock layer = 0.2 s 2 Depth, = vt
= 4000 x 0.2 = 800 m
1
1 1
3
TOTAL 6
4
(a)
Amount of heat required to change the phase of 1 kg of solid to liquid at constant temperature that is melting point.
Jumlah tenaga haba yang diperlukan untuk menukarkan fasa 1 kg pepejal kepada cecair pada suhu malar iaitu takat lebur.
1 1
(iii) It takes time for the heat to be distributed to all part of the ice. 1 1
TOTAL 7
5 (a) Upward force due to displaced fluid (air). 1 1
(b) (i) Volume of air displaced in Diagram 5.2 is bigger than that in Diagram
5.1 1 1
(ii) Buoyant force in Diagram 5.2 is bigger than that in Diagram 5.1 1 1 (iii) Pulling force in Diagram 5.2 is more than in Diagram 5.1 1 1 (c) The bigger the volume of the air displaced, the bigger the buoyant force 1 1 (d) The bigger the buoyant force the bigger the pulling force 1 1 (e) Easier
Because the density of air is less // Smaller buoyant force
1
1 2
TOTAL 8
6 (a) V is directly proportional to I provided that the physical quantities and temperature remains constant.
1 1
(b) (i) D6.1 bulbs are connected in parallel and D6.2 bulbs are connected in
series 1
3 (ii) (Brightness (of bulbs) in) D6.1 is more than D6.2 // vice-versa 1
(iii) (Potential difference in) D6.1 is more than D6.2 // vice-versa 1 (c) (i) When bulbs are arranged in parallel, brightness of bulb increased //
vice-versa
1
2 (ii) Bulbs in parallel, potential difference more / equal to p.d. of the
battery // vice-versa
1
(d)(i) Q > P =R 1
2 (ii) Effective resistance of P and R is more than Q // Current, I is more in
bulb Q / vice-versa
1
7 (a) (i) Current produced due to the cutting/changing of magnetic flux
Arus yang dihasilkan akibat pemotongan/perubahan fluks magnet
1
(ii) North
Utara 1
(b)
Note:
Vertical position of coil- V =0 amplitude (1M)
Horizontal position of coil- V= max (+ve) or max (-ve)amplitude (1M)
1
1
2
(c) (i) -The greater the number of turns of coil
-more cutting of magnetic flux 11 2 (ii) -soft iron core
-concentrate the magnetic flux 11 2 (iii) -curved/magnadur magnet (or sketch by student)
-to produce radial magnetic field
1
1 2
TOTAL 10
8 (a) Nuclear fission is the splitting of a heavy nucleus into two lighter nuclei, which subsequently emit either two or three neutrons and release of large
amounts of energy. 1 1
(b) To slow down the neutron 1 1
(c) Nuclear energy-heat energy-electrical energy 1 1 (d) E = mc2
= (2.998 x 10-28)(3 x 108)2
= 2.698 x 10-11 J 11 2
e(i) -Boron / cadmium
-to absorb some of the neutrons // reduce the rate of the fission reaction
1
1 2 e(ii) -heavy water
-high specific heat capacity
1
1 2 e(iii) -Thick
-To prevent leakage of radiation from the reactor core
1
1 2
(f) R 1 1
Mark Scheme Sub Mark
Total Mark
9 (a) Wavelength is the distance between 2 consecutive crests or trough. 1 1
(b) 1. The speed of red light is higher.
2. The frequencies of both light are the same.
3. The angle of refraction of red light is bigger than green light. 4. The higher the speed the bigger the refracted angle.
5. Light phenomena is refraction.
1 1 1 1
1 5
(c)
1. Ray from bird is refracted towards normal 2. Image of bird is higher
3. Ray from fish is reflected//// total internal reflection 4. Image of fish above water
4
(d) Suggestion Explanation / Reason
Use 2 convex lenses The lenses are objective lens and eyepiece Short Focal length of
both lenses and fo < fe To get a more magnified image
Object, u is placed: f< u < 2f
To get a real and magnified image.
Microscope equip with mirror or light bulb
To illuminate the object
More than one objective lenses with different power of lenses
Tissues can be observed with more than 1 magnifications
Max
10
20
(b) (i)
(ii)
In Diagram10.1, the switches are arrange in series while in Diagram10.2, the switches are arrange in parallel.
In Diagram10.1, to light up the bulb, both switches A and B are closed while in Diagram10.2, to light up the bulb, both switches A and B are closed or either one is open
1
1
In Diagram 10.1, the bulb only lights up in if both of the switches A and B are closed, hence there is only ONE chance for current to flow to give only ONE output of the logic circuit ‘1’.
In Diagram 10.2, the bulb lights up if both switches A and B are closed or either one is closed, hence there are THREE chances for current to flow to give THREE output of the logic circuit ‘1’.
1
1
Diagram 10.1 - AND gate ; Diagram 10.2- OR gate 1 (c) When burglar steps on the carpet, P is closed.
The potential difference across the resistor is high, Hence input to OR gate is high.
Output of OR gate is also high.
Hence the buzzer will ring/ produce sound.
1
Correctly filled 1 0 1 1
Over filled 0 0 1 0 bottle with juice.// The penetrating power of alpha is too low that cannot penetrate an empty bottle while that of gamma is too high that easily penetrate a filled bottle
Long - years Does not rapidly decay NOT gate at Y
(i.e.after AND gate)
The logic state of output will be low (i.e. 0) when the bottle is correctly filled.
State of
11 (a) The total momentum is conserved provided that no external force acting on the system.
1 1
(b) 1. When the air is mix with the fuel in the combustion chamber, it produce exhaust gas at high
temperature.
Apabila udara bercampur dengan bahan api di ruang pembakaran, terhasil gas ekzos pada tekanan tinggi.
2. Gas is pushes out with a very high velocity through the nozzle.
Gas dikeluarkan dengan halaju yang sangat tinggi melalui nozel ke belakang
3. It produces a big momentum backward. Wujud momentum gas yang besar ke belakang
4. Based on the Principle of conservation of
momentum, when there is a momentum backward, the same magnitude of momentum is produces forward to push the plane.
Berdasarkan Prinsip keabadian Momentum, apabila wujud satu momentum ke belakang, maka akan terhasil momentum ke hadapan dengan nilai yang sama untuk menggerakkan kapal terbang ke hadapan.
Aspek ExplanationPenerangan
Diameter of the nozzle:
Small The gas moves out with high velocity Size of propeller:
Big
Suck more air into the combustion chamber Type of fuel:
Kerosine/Paraffin
Mix with air in the combustion chamber Size of combustion
chamber: Big
More fuel can be burnt to produce bigger momentum Choosen design of jet
engine: L
Because it has small diameter of nozzle, big size of propeller, suitable type of fuel which is
(i) Direction of two forces correct Arah kedua-dua daya betul
(ii) Name of two forces correct Nama kedua-dua daya betul
(iii) Backward momentum (for every second), p = mv
= (100)(200) = 20 000 kgms-1
(iv) Forward momentum = 20 000 kgms-1
1
12 (a) Acts as an automatic switch to switch on the secondary circuit using higher voltage
Sebagai suis automatik untuk menghidupkan litar kedua yang menggunakan voltan tinggi.
1 1
(b) 1.When the switch is on, current flows through the coil
Bila suis di hidupkan, arus mengalir melalui gegelung
2. Producing electromagnet / coil is magnetised
Terhasil elektromagnet
3. Attract the armature
Menarik armatur
4. Contact is closed to switch on the secondary circuit
Sesentuh akan tertutup untuk menghidupkan suis pada litar kedua.
Many/more number of turns
Increase strength of electromagnet // can pull the armature more Soft iron core Easy to magnetised and
easy to be demagnetised Thicker wire More current flows //
Increase strength of electromagnet // can pull the armature more Alternating current
source
make the motor to function
Relay Q is chosen Higher no of turns, Soft iron core, Thicker wire,
1 +1
1 +1
1+1
1 +1
Alternating current source
(d)
(i) Direction of current correct -1 Arah betul
(ii) Pattern correct -1 (at least 2 circles) Corak betul
Direction correct - 1 Arah betul
(iii) Mark of x correct – 1
Tanda X betul
(iv) Mark of Y correct – 1 Tanda Y betul
1
1 1 1
1 4
