2017 S4 EOY P1 2017 S4 EOY P1 2017 S4 EOY P1 1 / 30 2017 S4 EOY P1 Q01 (modified) The reading on a calliper shows –0.4 mm when the jaws are closed with nothing clamped between its jaws. The reading on a calliper shows 4.5 mm when the jaws of the same calliper have 3 coins clamped between its jaws to measure their thickness. What is the thickness of one coin? 3.0 mm 1.5 mm 1.6 mm 1.4 mm 2 / 30 2017 S4 EOY P1 Q02 The diagram below shows a graph of displacement s against time t for an object moving in a straight line. If t1 is half of t2, which of the following expressions gives the velocity of the object? (s2–s1) / t1 s2 / t2 (s2–s1) / (t2–t1) (s2–s1) / t2 3 / 30 2017 S4 EOY P1 Q03 Two balls are dropped one after another from the same height from the same position. If air resistance is negligible, which of the statements is true? The two balls will drop with an increasing distance between them. The two balls will drop with a decreasing distance between them. The two balls will drop with a constant distance between them. The distance between the two balls will depend on their relative masses. 4 / 30 2017 S4 EOY P1 Q04 A ball is fired horizontally away from the top of a 125 m tall building with an initial speed of 12.0 m s⁻¹. Neglecting the effects of air resistance, what is the distance between the foot of the building and the landing point of the ball on the ground? 10.5 m 150 m 120 m 60.0 m 5 / 30 2017 S4 EOY P1 Q05 A lift moves downwards at a constant speed of 1.5 m s–1. If the lift has a mass of 600 kg, what is the tension in the cable? 900 N 9000 N 3000 N 6000 N 6 / 30 2017 S4 EOY P1 Q06 A hot air balloon of mass m rises with acceleration x. What is the additional mass needed to be attached to the balloon so that the balloon will travel downwards with an acceleration of 2x? Take gravitational acceleration to be g. 7 / 30 2017 S4 EOY P1 Q07 A 15 N force acts on a 2.0 kg mass and a 1.0 kg mass resting on a smooth surface as shown below. Which of the following is correct? D B A C 8 / 30 2017 S4 EOY P1 Q08 A force F is applied horizontally to a uniform cylinder weighing 200 N as shown below. Given that the radius of the cylinder is 10.0 cm, what is the smallest value of F to cause the cylinder to roll up the 5.0 cm high step? 200 N 400 N 350 N 125 N 9 / 30 2017 S4 EOY P1 Q09 A machine lifted a 500 N weight to a height of 3.0 m in 2.0 s. What is the amount of energy required to lift the same weight to a height of 3.0 m in 1.0 s? 750 J 3000 J 1500 J 500 J 10 / 30 2017 S4 EOY P1 Q10 A man stands still while a plane mirror is wheeled away from him at a speed of 2.0 m s–1. How fast does he see his image moving away? 2.0 m s–1 4.0 m s–1 6.0 m s–1 1.0 m s–1 11 / 30 2017 S4 EOY P1 Q11 Four point objects, P, Q, R and S are concealed from an observer, O by an opaque wall as shown. Which objects can O see from the mirror? Q, S and P only P, R and S only Q, R and S only P, R and Q only 12 / 30 2017 S4 EOY P1 Q12 Light travels from a medium of refractive index 1.5 to a medium of refractive index n. If the critical angle observed was 57º, what is the value of n? 1.1 1.2 1.0 1.3 13 / 30 2017 S4 EOY P1 Q13 A converging lens has a focal length of 20.0 cm. If an object is placed at 10.0 cm away from the optical centre of the lens, what are the characteristics of the image formed? virtual, upright and diminished real, inverted and diminished real, upright and magnified virtual, upright and magnified 14 / 30 2017 S4 EOY P1 Q14 A converging lens is used to produce an image that is 3 times the size of an object. If the distance between the object and the image is 40.0 cm, what is the focal length of the lens? 7.5 cm 15 cm 10 cm 13 cm 15 / 30 2017 S4 EOY P1 Q15 Which of the following is a property of all electromagnetic waves? They travel through a vacuum. They are positively charged. They are deflected by magnets. They travel at the speed of sound. 16 / 30 2017 S4 EOY P1 Q16 Given that the frequency of a radio wave is 1.3 kHz in vacuum and the speed of light in vacuum is 3.0 × 108 m s–1, what is the wavelength of this radio wave? 2.3 × 105 m 3.9 × 108 m 3.9 × 105 m 2.3 × 108 m 17 / 30 2017 S4 EOY P1 Q17 A man sings in a circular room. At which position will he hear himself the loudest? C D A B Being the centre of the circle all the sound will reach the wall at the same time and then the echo will reach him at the same time. Thus creating a short loud echo. 18 / 30 The diagram below shows the field lines between a positive charge and a negative charge. 2017 S4 EOY P1 Q18 Which of the following statement is not correct? The electric field at Y is stronger than that at X and Z. The electric field at X is stronger than that at Z. The electric field at Y is stronger than that at Z. The electric field at X is stronger than that at Y and Z. 19 / 30 2017 S4 EOY P1 Q19 Four identical resistors are connected in different ways as shown below. Which of the following is the connections arranged in ascending order of effective resistance across PQ? III, II, IV, I III, IV, II, I IV, III, I, II IV, III, II, I 20 / 30 2017 S4 EOY P1 Q20 The diagram below shows the current-voltage (I-V) graph of electric components X and Y. Which of the following statement is correct? When X and Y are connected in parallel to a 6.0 V battery, the current drawn from the battery is 10 A. The resistance of X is larger than the resistance of Y. X and Y have constant resistance. When X and Y are connected in series to a 6.0 V battery, the current drawn from the battery is 10 A. 21 / 30 2017 S4 EOY P1 Q21 Two wires P and Q, of the same length 1.0 m and made of the same material are connected in parallel to a battery. The cross-section area of P is half of that of Q. What is the ratio of the current through P to that in Q? 2.0 4.0 0.25 0.50 22 / 30 2017 S4 EOY P1 Q22 Why is it dangerous to touch a mains switch with wet hands? Short circuit may occur. The water increases the area of contact between the hand and the switch. The resistance of the body is lower when the hand is wet than when it is dry. The potential difference between the live wire and neutral wire will increase. 23 / 30 2017 S4 EOY P1 Q23 The diagram below shows two rods X and Y. When end P of rod X is placed close to end Q of rod Y, the two rods attract. When end P of rod X is placed close to end R of rod Y, they also attract. Which of them is/are magnet(s)? Either X or Y is a magnet. Only Y is a bar magnet. Only X is a bar magnet. Both X and Y are magnets. 24 / 30 2017 S4 EOY P1 Q24 The diagram below shows two soft-iron rods suspended vertically side by side inside a coil of wire. Which of the following correctly describes what happen to the soft-iron rods when an electric current passes through the coil as shown? They move towards each other. They move upwards. They remain stationary. The move away from each other. 25 / 30 2017 S4 EOY P1 Q25 The diagram below shows a step down transformer. The lamp glows dimly. Which of the following changes would cause the lamp to glow more brightly? Decrease the number of turns on the primary coil. Replace the soft-iron core with a copper core. Remove portion X of the soft-iron core. Replace the primary and secondary coil with thinner wires. 26 / 30 2017 S4 EOY P1 Q26 The diagram below, half of a circular coil is inside a uniform magnetic field. PQ and RS are two perpendicular diameters of the circular coil. Which of the following movements will in induce a current to flow clockwise in the coil? Pull the coil in the direction R. Pull the coil in the direction S. Pull the coil in the direction P. Pull the coil in the direction Q. Use Fleming's Right Hand Rule 27 / 30 (no longer in syllabus) 2017 S4 EOY P1 Q27 A thermocouple thermometer as shown in the diagram below is used to calibrate an unmarked mercury thermometer. The reading of the voltmeter and the length of the mercury columns at two different temperatures are recorded in the following table: When both junctions of the thermocouple are placed in melting ice, the reading of the voltmeter is 0.0 V. What is the length of the mercury column when the mercury is immersed in melting ice? 1.1 cm 1.2 cm 1.4 cm 1.3 cm 28 / 30 2017 S4 EOY P1 Q28 Which of the following statement about the property of gases is correct? The air molecules in the closed cabin space of a moving car have higher average kinetic energy than those in a stationary car. The frequency of vibration of the gas molecules about their fixed position increases as temperature increases. When an electric fan is turned on, the average kinetic energy of air molecules increases. When the volume of a gas expands, the volume each gas molecule remains unchanged. Kinetic Energy is actually dependant upon the reference frame you are in (are you in the car or outside of the car), so this option is not true if we consider that average kinetic energy is a measure of the temperature of the gas. So although this option may have seemed possible, the option about the volume of each molecule remaining constant is something you should be aware of. 29 / 30 2017 S4 EOY P1 Q29 A can of soft drinks and a plastic bottle of drinking water are taken out from the refrigerator at the same temperature. Which of the following gives the correct description and explanation when both are touched? They will feel the same to you since they have the same temperature. They will feel the same to you since what you feel does not depend on the nature of the material. The bottle of drinking water feels much cooler since plastic is a good insulator that traps the coldness. The can of soft drinks feels much cooler since metal is a good conductor of heat. 30 / 30 2017 S4 EOY P1 Q30 A student mixes 2.4 kg of cold water at 2.0 ºC with 0.48 kg of water at 18 ºC. The final temperature of the mixture is 6.0 ºC. If the specific heat capacity of water is 4.2 × 3J kg-1 ºC-1, which of the following statement is correct? 1.6 × 104 J of energy is gained from the surrounding. The hot water loses 4.0 × 104 J of energy. 1.9 × 105 J of energy is lost to the surrounding. The cold water absorbs 2.4 × 104 J of energy. Heat gained by cold water is: Q=mcΔθ = 2.4×4.2×103×(6–2) = 4.0×104 J Heat lost by hot water is: Q=mcΔθ = 0.48×4.2×103×(18–6) = 2.4×104 J As more energy is gained by the cold water than lost from the hot water the system must be gaining energy from the surroundings. So answer should be 1.6×104 J is gained from the surroundings. Your score is