2020 S4 EOY P1 2020 S4 EOY P1 2020 S4 EOY P1 1 / 30 Which of the following physical quantities is not correctly matched to an equivalent unit? B C D A 2 / 30 The speed-time graph of an oscillating pendulum bob is shown below. What is the frequency of the oscillation of the pendulum? 0.5 Hz 1.0 Hz 2.0 Hz 1.5 Hz 3 / 30 A man standing on the balcony of his house throws a ball vertically upwards. The ball reaches the maximum height after 2.0 s before dropping to the ground below. Take the upward direction as positive and assume air resistance is negligible. Which of the following statements about the motion of the ball is incorrect? The velocity at the maximum height is 0 m s-1. The ball left the hand at a velocity of 20 m s-1. The acceleration throughout the motion is –10 m s-2. The ball will hit the ground at a velocity of –20 m s-1. 4 / 30 (not tested - no longer in syllabus) 2020 S4 EOY P1 Q04 In the diagram below, a car is travelling to the left and petrol is leaking from the car at a constant rate of 1 drop every 0.5 s. What is the average acceleration of the car? 6.7 m s−2 –4.4 m s−2 –6.7 m s−2 4.4 m s−2 5 / 30 Three blocks, Q, R and S rest on a rough floor. A force of 90 N is applied at one end as shown in the diagram below. The masses of Q, R and S are 1.0 kg, 2.0 kg and 3.0 kg respectively. The frictional forces acting on the blocks are 1.0 N, 2.0 N and 3.0 N respectively. What are the tensions T1 and T2? C D A B 6 / 30 Only 2 forces act on an object. If the object is in equilibrium, which of the following condition(s) is/are required? (1) The 2 forces are of the same magnitude. (2) The 2 forces act in opposite directions. (3) The 2 forces act in the same direction. (4) The 2 forces are of the same nature. (3) and (4) only (1) only (2) and (4) only (1) and (2) only 7 / 30 Which of the following diagrams shows forces in equilibrium? 8 / 30 The diagram below shows a smooth pulley with two blocks of masses P kg and Q kg hanging on each side. Given that P < Q, and taking g to be the acceleration due to gravity, what is the acceleration of the system when the system is released? 9 / 30 A 2.0 kg uniform rod of length 8.0 m is supported by 2 forces F1 and F2 as shown below. What is the relationship between F1 and F2? 3F1 = 2F2 F1 = 2F2 2F1 = F2 2F1 = 3F2 10 / 30 2020 S4 EOY P1 Q10 A car of mass 1200 kg has an engine that delivers a maximum power of 140 kW. What is the minimum time that the car takes to accelerate from rest to a velocity of 70 km h–1? 42 s 1.6 s 3.2 s 21 s 11 / 30 2020 S4 EOY P1 Q11 Which of the following will decrease the height of liquid column of a barometer? The temperature of the surrounding of the barometer increases. The liquid used is replaced with one of a lower density. The barometer is brought to the top of a high mountain. The glass tube is replaced with a narrower one. 12 / 30 2020 S4 EOY P1 Q12 A simple hydraulic press system is shown in the diagram below. What is the effort required to lift load L that has a mass of 500 kg? 20 500 N 2.0 N 200 N 13 / 30 2020 S4 EOY P1 Q13 An object was placed 15.0 cm in front of a thin convex lens. The sharp image produced was magnified and upright. What must be true about the focal length of the lens? It is greater than 30.0 cm It is less than 15.0 cm It is between 15.0 cm to 30.0 cm It is greater than 15.0 cm 14 / 30 A light ray travels through a transparent box and emerges as shown. Which would be the correct arrangement of a mirror or glass prism or glass block placed in the centre of the box? plane mirror plane mirror glass block equilateral glass prism 15 / 30 Two parallel rays of light M and N pass through a converging lens as shown below. Which point will ray R pass through? A D B C 16 / 30 Which of the following statements is true about all electromagnetic waves? They obey the wave equation, v = ƒλ. They carry charges. They cannot pass through solid objects. They always travel at the speed of 3.0 × 108 m s–1. 17 / 30 When water waves travel from a shallow region to a deeper region, how do the frequency, wavelength and speed change? C D A B 18 / 30 A student wants to charge an isolated metal sphere by induction using a strip of acetate. She uses the following steps, but not in this order. I The acetate strip is removed. II The acetate strip is rubbed with a woolen cloth. III The metal sphere is earthed momentarily. IV The acetate strip is brought near to the sphere. In which order can these stages be carried out to charge the metal sphere? II → IV → I → III II → IV → III → I III → II → I → IV III → II → IV → I 19 / 30 The diagram below shows a rectangular copper block with dimensions L, 2L, and 4L. Electrical contact can be made to the block between opposite faces. Assuming that the resistivity of the block is ρ, what is the smallest possible value of electrical resistance that can be obtained? ρ / 2L 2ρ / L ρ / 9L ρ / 8L 20 / 30 The circuit diagram shows a network of identical resistors each of resistance R. What is the effective resistance across the points E and F? R / 4 5R / 3 5R / 2 4R / 3 21 / 30 Five identical resistors are arranged in a circuit with ammeters as shown in the diagram below. Which ammeters have the same reading? A1 and A3 A1 and A2 A2 and A3 None of them 22 / 30 Which is the I-V characteristic graph of a diode? 23 / 30 Resistors G and H are connected in parallel to the power supply as shown in the diagram below. The ratio of the power dissipated for G to H is 5 : 6. They are then connected in series to the same supply as shown in the diagram below. What is the ratio of the power dissipated for G to H when they are connected in series? 25 : 36 6 : 5 36 : 25 5 : 6 24 / 30 A bar magnet is split into two equal halves, forming two new separate magnets, as shown in the diagram below. What are the polarities of regions J and K of the new magnets? C D A B 25 / 30 The diagram below shows three pairs of parallel wires with current in the directions shown. Which forces do the pairs of wires experience? C A D B 26 / 30 A small flat circular coil is placed inside a similar larger coil. Each coil carries current in the direction as shown. What does the small coil experience due to the current in both coils? a torque about the vertical axis no net force or torque a net force along one of the axes a torque about the horizontal axis 27 / 30 (not tested - no longer in syllabus) 2020 S4 EOY P1 Q27 The length of the mercury thread in a thermometer is 2.0 cm at 0 °C and 3.0 cm at a temperature of 10 °C. When the thermometer is placed in pure boiling water, what is the length of the mercury thread? 8.0 cm 10.0 cm 6.0 cm 12.0 cm 28 / 30 A fixed mass of gas expands at constant temperature in a syringe. How do the properties of the molecules of the gas change? B C A D 29 / 30 Which type of surface is the best emitter and best absorber of infra-red radiation? B C D A 30 / 30 Two solid substances U and V are heated by the same heater. The graph below shows the variation of temperature with time for these substances. If U and V have the same mass, which of the following statements must be true? The specific latent heat of fusion of U is higher than that of V. The melting point of U is higher than V. Liquid U has a lower specific heat capacity than liquid V. Solid U has a higher specific heat capacity than solid V. Your score is