Sec 4 Science Physics SA2 2018 West Spring

West Spring Secondary School PRELIMINARY EXAMINATION 2018 SCIENCE (PHYSICS, CHEMISTRY) Paper 1 Multiple Choice 5076/01 SECONDARY 4/5 EXPRESS/ NORMAL ACADEMIC Name ______________________________ ( ) Date 17 September 2018 Class _____________ Duration 1 hour Additional Materials: Optical Mark Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, index number and class on the Multiple Choice Answer Sheet provided. Write in dark blue or black pen. There are forty questions in this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in the Multiple Choice Answer Sheet provided. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. A copy of the periodic table is provided. The use of an appropriate scientific calculator is expected, where appropriate. This document consists of 17 printed pages including this cover page. Setter: Mr Mok KF and Ms Priscilla Yu [Turn over] www.KiasuExamPaper.com 288

2 1 In the diagram below, a micrometer screw guage is used to measure the diameter of a ball bearing. The actual diameter of the ball bearing is 4.65 mm. What is the zero error of this micrometer? A -0.52 mm B -0.02 mm C +0.02 mm D +0.52 mm 2 The diameter of four spherical objects W, X, Y and Z are tabulated below. Object Diameter W 17 Pm X 4.88 x 10 3 km Y 3.74 nm Z 6.7 x 10 -2 m Which of the following correctly lists the objects in ascending order of diameter? A X, W, Z, Y B Y, W, Z, X C Y, Z, W, X D Z, Y, X, W 3 The diagram below shows four objects placed on a slope. The dot in each object indicates its centre of gravity. Which object is the most unstable? www.KiasuExamPaper.com 289

3 4 Elfie is jogging initially at constant speed around a track. He gets distracted by a friend at the grandstand and then jogs at a lower constant speed. Which of the following shows the distance-time graph of Elfie’s jog? AB CD 5 Two similar balls are dropped from a building at the same time. One falls from 40 m from the ground while the other from 20 m. Assuming that air resistance is negligible, which physical quan tity is the same for both balls just before they reach the ground? A acceleration B final velocity C displacement D kinetic energy www.KiasuExamPaper.com 290

4 6 A person lifts boxes of equal weight onto a platform. Which quantity would not affect the total work done by the person? A the mass of the boxes B the number of boxes lifted C the time taken to lift the box D the height of the platform above the ground 7 A bullet of mass 0.040 kg enters a wooden target horizontally. Its speed of entry is 300 m/s and it comes to rest 5.0 cm into the target, at the same height as the point of entry, as shown. What is the frictional force exerted on the bullet by the wooden target? Assume the frictional force is constant. A 120 N B 360 N C 1800 N D 36000 N 8 The diagram shows a tractor on muddy ground. Why does the tractor need to have big and wide tires? A to travel a further distance B to avoid skidding on the ground C to support the weight of the tractor D to reduce the pressure on the ground 5.0 cm bullet www.KiasuExamPaper.com 291

5 9 The outlet of a glass syringe is sealed so that air is trapped below the piston as shown in the diagram below. Which of the following explains why the piston begins to rise when the syringe is placed in hot water? A Convection is occurring inside the syringe. B The glass is expanding. C The molecules of trapped air become bigger. D The trapped air molecules are hitting the piston more often with greater force. 10 The diagram below shows very small pollen grains suspended in a beaker of water. A bright light shines from the side of the beaker. Small, bright dots of light are seen through a microscope. The dots move in rapidly changing and random directions. Which of the following statements explains the observation? A Convection current due to energy from the light source causing the pollen grains to collide with water molecules. B Convection current due to energy from the light source causing the water molecules to collide with the pollen grains. C Random collision between pollen grains. D Random collision between water molecules and pollen grains. www.KiasuExamPaper.com 292

6 11 Hot water of the same temperature are poured simultaneously into four similar cups with different type of surfaces. Which of the cups will register the fastest fall in temperature? 12 A cook makes the pudding ‘baked Alaska’. The pudding is placed in a very hot oven until the top of the egg white turns brown. It is then removed from the oven. Why does the ice cream stay cold? A Air is a good conductor of heat and conducts the heat away from the ice cream. B Air is a poor conductor of heat and reduces the heat transfer to the ice cream. C The metal dish is a good conductor of heat and conducts the heat away from the ice cream. D The metal dish is a poor conductor of heat and reduces the heat transfer to the ice cream. 13 The diagram below shows a plotting compass placed above a current carrying wire. Ignoring effects of the Earth’s magnetic field, which of the following shows the direction which the compass needle will point towards? A B C D dull black shiny black dull white shiny white thermometer thermometer A B C D egg white ice cream sponge cake dish bubbles resistor compass www.KiasuExamPaper.com 293

7 14 The displacement-distance and displacement-time graphs are show n below for a water wave in an ocean. What is the frequency of the water wave? A 0.025 Hz B 0.05 Hz C 50 Hz D 100 Hz 15 A small conducting sphere is suspended by an insulated thread. When a positively charged rod is brought near the sphere, the sphere is attracted as shown in the diagram below. Which of the following is/are reasonable deduction(s)? I The sphere may carry a positive charge. II The sphere may carry a negative charge. III The sphere may be neutral. A I and II only B I and III only C II and III only D III only www.KiasuExamPaper.com 294

8 16 The diagram shows four similar light bulbs connected to a batte ry. Each bulb operates at normal brightness. If bulb X breaks, what happens to the brightness of the remaining bulbs? Bulb W Bulb Y Bulb Z A decreases decreases decreases B decreases increases increases C increase unchanged unchanged D increase increases increases 17 A battery is connected to two crocodile clips and a lamp. There is a gap between the crocodile clips. Four wires W, X, Y and Z, made of the same material but have different lengths and thicknesses, are connected in turn between the crocodile clips. Which wire will make the lamp glow the most brightly and which wire will make the lamp glow the least brightly? most brightly least brightly A XY B YZ C WY D WZ www.KiasuExamPaper.com 295

9 18 The ray diagram below shows the formation of a real image by a converging lens. What is the focal length of the lens? A 1.5 cm B 3c m C 4c m D 12 cm 19 The diagram below shows a circuit with four voltmeter readings V1, V2, V3 and V. Which equation relating the voltmeter readings must be true? A V = V1 + V2 + V3 B V + V1 = V2 + V3 C V = V1 + V3 D V2 = 2V3 www.KiasuExamPaper.com 296

10 20 An electric cooker is connected to the power supply by a 3 core cable. When the cooker is working correctly, which wires, if any, carry the same current? A the live and the earth wires B the live and the neutral wires C the live, the neutral and the earth wires D none of the three wires carry the same current www.KiasuExamPaper.com 297