[ 4551/1 ] [ 4551/2 ] [ 4551/3 ] SOALAN ULANGKAJI SPM Kertas 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. B A B D A D E A D D D B A 26. 27. B 28. A 29. B 30. A 31. 32. 33. A 34. B 35. B 36. D 37. 38. A 39. D 40. D 41. B 42. D 43. 44. A 45. A 46. B 47. D 48. D 49. A 50. A
SOALAN ULANGKAJI SPM Kertas 2 Markah 1 (a) 15 m (b) (c) 2 (a)(i) (a) (b) 3(a) (b) (c) (d) Velocity//Speed onstant // uniform velocity // uniform speed Stationary / not moving / stops Zero error // systematic error 24.0 s T =1.20s 10 x (1.2)² 4(3.142)² =0.3647 m onvex mirror Upright/ diminished/ smaller/ virtual Draw parallel ray from the object that incident along a path parallel to the principle axis appears to go through the focal point. A radial ray that is incident through the centre of curvature, of the curved mirror is reflected back along the incident path through point Determine the correct position of the image To increase the field of vision. 4(a) (b) (c) Transistor NPN IB + I = IE V2 = R2 6 R2 + 1500 R2 = 750 Ω The bulb will not light up Resistance R2 is small urrent amplifier
SOALAN ULANGKAJI SPM Kertas 2 Markah 5 (a) hange in momentum (b) (b)(iii) (b)(iv) (b)(v) (c) Force on the egg in diagram 5.2 is larger Time of impact for surface A is longer/vice versa The change in momentum is the same The time of impact is inversely proportional to the force produced in a collision Sponge/ carpet/ towel/cloth/ grass or any other acceptable materials. The time taken during the impact is small The impulsive force produced on the pile during impact is large 6 (a) (b) (d) 7 (a) The current that is induced by electromagnetic inductions when the circuit is complete X : North Y : South Diagram 6.1 bar magnet towards the solenoid Diagram 6.2 bar magnet away from the solenoid Repulsive Attractive Increase the speed of bar magnet/ increase the number of turns of the solenoid/ use a stronger magnet. Logic gates are electronic switches with one or more inputs and one output (b) (b)(iii)
SOALAN ULANGKAJI SPM K L M 0 0 0 0 1 0 1 0 0 1 1 1 (c) AND (d) (e) Light - sensitive devive Input P Output R Heat - sensitive devive Input Q (8)(a) (b) Resultant force/net force is zero W = mg = 60x10 = 600 N (c) T=345 N L=3.45 cm T=345 N L=3.45 cm T 60º 60º T
SOALAN ULANGKAJI SPM (d) (e) (f) 2T = W 2T = 600 T = 300 N Method in diagram 8.2 Tension is lower ½ mv² = mgh v² = 2gh = 2 x 10 x 2 = 40 v = 6.32 ms -1 9(a)(i) Distance from the optical centre to a focal point,lens K is thicker than lens J,Light ray is refracted more in lens K than lens J,Focal length of lens K is shorter than lens J,Therefore the thicker the lens, the greater the refraction of light and with that the shorter the focal length of a lens will be. As a magnifying glass Enlarge / magnified, Inverted, Virtual hoose lens S as objective lens. hoose lens Q as eyepiece, Lens S is placed in front of lens Q, Distance between the two lenses is equal to (fo + fe) (c) Modification Use lower power convex lens Use higher power convex lens as the eye lens Use bigger diameter of objective lens Explanation Modification of telescope = f o / f e High power lens has a shorter focal length more light permitted to enter the telescope and a clearer image is seen 10(a) (iii) (iv) (c) The spontaneous disintegration of an unstable nucleus accompanied by emission of energetic particles The time taken for the activity of A to be half its original value is constant,the time taken for the activity of B to be half its original value is constant This time is different for different substances. The time taken for the activity to become half its initial value is constant Half-life The splitting of a heavy nucleus into two lighter nuclei, The combination of two lighter nuclei to form a heavy nucleus The resulting nucleus (nuclei) formed has a smaller mass than the original nucleus (nuclei), The mass defect caused energy to be released
SOALAN ULANGKAJI SPM (d)(i) Put a radioactive substance into the water and let the water flow to the location of the leak, After some time use radiation detector above the ground to detect the location of increased activity. This position is the location of the leak The radioactive substance would flow out together with the water and remain outside the pipe Suggestions The half life should be a few days long The source should be emit Y particles The detector should be able to detect Y particles Explanation To allow the location to be detected and thereafter the radioactive contamination is reduced This enable the radiation to be detected above the ground High ionizing particles like α and β particles are absorbed by the ground 11(a) (i) Pascal s Principle states that in enclosed fluid, an externally applied pressure is transmitted uniformly in all direction. haracteristics Type of liquid : oil Thickness of brake line : High The ratio of cross sectional area for wheel piston and master piston : high The chosen of the type of brake for front and rear wheel: Front wheel disc Rear wheel - drum Explanation Uncompressible To counter the high pressure from the liquid To produce larger force on wheel piston Disc brake is more efficient than drum brake hosen brake system : S Reason: it uses oil as the brake liquid, has high thickness of the brake line, the ratio of cross sectional area for wheel and master piston is high, uses disc brake for front wheel and drum brake. (iii) (iv) When the small piston, X is pressed down, the pressure is exerted under the piston X. The liquid transmit pressure to all directions and to large piston, Y, When the pressure acted on larger piston, Y it will produced a large force. The large force will push the load up Px = Fx / Ax = 15/0.02-750Nm -2 F = PA = (750)(0.28) = 210 N Volume of liquid transferred is unchanged A 2 X 2 = A 1 X 1 X 2 = (A 1 /A 2 )( X 1 ) = (0.02 / 0.28)(21) = 1.5 cm
SOALAN ULANGKAJI SPM 12 (a)(i) Three resistors are connected one after another ((b) The current trough each electrical appliance is higher. If any devices, others can still be used. The circuit breaker Only certain devices that are not in use can be switched off. The current can still flow through the other path. Low power lamp.safe cost.high efficiency.the room looks brighter.long life span.no need to replace often Low price.save money.long fluorescent.low power with highest efficiency, long hours of life span and medium price. 3.3Ω 9 = l x 5 1.8 A 92/10 8.1 W
SOALAN ULANGKAJI SPM Kertas 3 1(a)(i) Temperature Length Pressure of the trapped air All correct At least two correct θ/ l/cm 0 7.1 20 7.6 30 7.9 40 8.1 50 8.4 60 8.7 70 9.0 θ and l shown in the table, state the units of θ and l, all values of l is filled,all values of θ is filled all values of l are consistently to one decimal θ/ 0 20 30 40 50 60 70 l/cm 7.1 7.6 7.9 8.1 8.4 8.7 9.0 (c) (d) Show l on Y axis and θ on X axis, State the units of the variable correctly, Both axes are marked with uniform scale, All seven points are plotted correctly, Best straight line is drawn. Show the minimum size of graph at least 5 x 4 l increase linearly with θ 2(a) The secondary voltage is directly-proportional to the primary voltage Show the gradient on the graph half of the graph, Show y2 y1/ x2 x1 with substitution, m = 2 Step-up
SOALAN ULANGKAJI SPM (b)(iii) (c) 3.(a) (b) N s / N p = m N s = 2 x 250 = 500 Efficiency = (0.39 x m) 100% = 0.39 x 2 x 100% = 78 % oil s resistance Induced eddy current in the soft iron The leakage of magnetic flux Magnetization and demagnetization of the core. Pressure of liquid depend to the depth The pressure of liquid increase as the depth increases (iii) (iv) To investigate the relationship between pressure and depth Manipulated variable :depth Responding variable : pressure Fixed variable : density of liquid Tube U (manometer), thistle funnel, riber membrane, rubber tubing, metre rule, water and rubber band. meter ruler manometer rubber tubing measuring cylinder Y coloured water thistle funnel rubber membrane water (v) The mouth of thistle funnel is lowered vertically into water until depth, h = 5 cm The height difference, of water in the manometer is observed and recorded.
SOALAN ULANGKAJI SPM (vi) Experiment are repeated for h = 10 cm, 15 cm, 20cm, 25 cm h/cm y/cm y/cm h/cm 4.(a) (b) (iii) (iv) Resistance is depends to the diameter/cross sectional area of wire The resistance of the wire decreases as its diameter increases To investigate the relationship between diameter of wire and resistance Manipulated variable: diameter Responding variable : resistance Fixed variable : length/temperature onstantan wire, metre rule, connecting wire, dry sells, rheostat, Ammeter, voltmeter and switch. Switch Dry cells reostat ammeter X voltmeter
SOALAN ULANGKAJI SPM (v) The circuit is set up as shown in figure with the 20cm of constantan wire S.W.G 20 across the point X and Y. The switch is on and the rheostat is adjusted until the ammeter shows a reading of 0.8A The ammeter reading and voltmeter reading are recorded. The resistance of the constantan wire is calculated using R = V/I (vi) Diameter/swg(mm) Resistance, R Ω (vii) R Ω d/swg