O Lvl Physics Dunman High Prelim 2019 Paper 1 and 2 with ANS

Page 1 of 13 Name Index Number Class 4 A DUNMAN HIGH SCHOOL PRELIMINARY EXAMINATION 2019 GCE O LEVEL PHYSICS Paper 1 6091/1 Paper 1 Multiple Choice 03 September 2019 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write your name and index number on all the work you hand in. Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. There are forty questions on this paper. Answer all questions. For each question there are four possible answers, A, B, C and D. Choose the one that you consider correct and record your choice in soft pencil on the separate Answer Sheet. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate. For teacher’s use: Paper 1 /40 Paper 2 /80 Total /120 This document consists of 13 printed pages. www.KiasuExamPaper.com 199

Page 2 of 13 1 A car travels at a speed of 65 km/h. What is the speed of the car in m/s? A 18.1 m/s B 55.4 m/s C 181 m/s D 1080 m/s 2 A light ray is reflected off two mirrored surfaces. (not to scale) What is the value of θ? A 5° B 10° C 15° D 20° 3 A name tag reads “SAM”. What is the image of the name tag in a plane mirror? A B C D 4 The refractive index for germanium is 4.01. What is the speed of light in germanium? A 7.5 × 107 m/s B 7.5 × 108 m/s C 1.2 × 108 m/s D 1.2 × 109 m/s www.KiasuExamPaper.com 200

Page 3 of 13 5 A thin, converging lens of focal length f, is used to produce various types of images. Which row is correct? location of object type of image produced A less than f inverted, virtual, diminished B between f and 2f upright, real, enlarged C at 2f inverted, real, same size D beyond 2f upright, real, diminished 6 A rope is fixed to a wall at one end with the other end moved up and down to produce a wave. wall What is transferred along the rope due to this motion? A mass B energy C frequency D molecules 7 Which is not an application of microwaves? A To detect structural flaws. B To ionise biological molecules. C To cook food in microwave ovens. D To transmit communication signals. 8 The wavelength of an X-ray is 1.0 nm while the wavelength of a radio wave is 1.0 mm. What is the ratio of the frequency of the X-ray to the frequency of radio wave? A 1 : 1 00 000 B 1 : 1 000 000 C 1 00 000 : 1 D 1 000 000 : 1 9 A sound travels through a solid copper tube and then enters air. Which of the following correctly compares the sound in the solid copper tube to air? frequency speed (in copper tube) A different higher B different same C same higher D same lower www.KiasuExamPaper.com 201

Page 4 of 13 10 A series of compressions and rarefactions of a sound wave are shown. (not to scale) What is the wavelength of the sound wave? A 2.0 m B 3.0 m C 4.0 m D 6.0 m 11 Which defines acceleration? A ݁ܿ݊ܽݐݏ݄݅݀݊݅݁݃݊ܽܿ ݊݁݇ܽݐ݁݉݅ݐ B ݊݋݅ݐܿ݁ݎ݅݀݀݁ݔ݂݅ܽ݊݅݁ܿ݊ܽݐݏ݄݅݀݊݅݁݃݊ܽܿ ݊݁݇ܽݐ݁݉݅ݐ C ݀݁݁݌ݏ݄݊݅݁݃݊ܽܿ ݊݁݇ܽݐ݁݉݅ݐ D ݕݐ݅ܿ݋݈݁ݒ݄݊݅݁݃݊ܽܿ ݊݁݇ܽݐ݁݉݅ݐ 12 A stone falls freely from rest from the top of a building of height, 80 m. The gravitational field strength g is 10 N/kg. What is the speed of the stone when it hits the ground? A 4.0 m/s B 8.0 m/s C 40 m/s D 80 m/s 13 Which quantity is a scalar? A displacement B force C weight D work done 4.0 m www.KiasuExamPaper.com 202

Page 5 of 13 14 A body is acted on by two forces, S and T. A frictional force, F keeps the body in equilibrium. Which vector diagram shows the relationship between these forces? A B C D 15 A helicopter of mass 3.0 x 103 kg rises vertically with a constant speed of 25 m/s. The gravitational field strength g is 10 N/kg. What is the resultant force acting on the helicopter? A 0 N B 3.0 x 104 N downwards C 4.5 x 104 N upwards D 7.5 x 104 N upwards 16 A parachutist is falling through air with terminal velocity. Which quantity is changing? A acceleration B gravitational potential energy C kinetic energy D mass 17 Which object has the largest inertia? A a 1.5 x 10-1 kg baseball pitched at 170 km/h B a 1.2 x 103 kg sports car travelling at 100 km/h C a 5.0 x 103 kg stationary helicopter D a 3.0 x 106 kg falling tree www.KiasuExamPaper.com 203

Page 6 of 13 18 The mass and volume of different sized samples of a newly discovered metal are measured. Which graph shows how the mass varies with volume? A B C D 19 A uniform beam has a weight of 60 N and a length of 2.0 m. It is pivoted at a length of 0.60 m from the end X. At what distance from the pivot should a 160 N weight be placed in order to balance the beam? A 0.150 m B 0.225 m C 0.375 m D 0.450 m www.KiasuExamPaper.com 204

Page 7 of 13 20 A student of weight 500 N runs up a slope of length 30 m and height 15 m in 25 s. What is the power developed by the student? A 30 W B 60 W C 300 W D 600 W 21 The two cubes shown below are made from the same material. The bigger cube has sides that are twice as long as the smaller cube. Standing on one face, the small cube exerts a pressure, P on the floor. Given that the smaller cube has a weight, w and the bigger cube weighs eight times as much, what is the pressure exerted by the larger cube standing on one of its faces? A ½ P B P C 2P D 4P 22 Equal masses of water are poured into four jars as shown. Which jar has the least pressure exerted by the water on the base? 23 When fine pollen grains suspended in water are viewed under a microscope, they are seen to be making small, erratic movements. Why is this? A There are convection currents in the water. B They are being hit by water molecules. C They are moving and colliding with one another. D They are living organisms so they move around. A B C D x 2x w www.KiasuExamPaper.com 205

Page 8 of 13 24 Which physical property is not suitable for defining temperature scales? A e.m.f at the junction of two different metals B mass of a solid object C volume of a liquid column D volume of trapped gas 25 A piece of wire has an electrical resistance of 980 Ω in ice of -10 °C, and 1750 Ω in boiling water at 100 °C. What is the resistance of the piece of wire at 30 °C, assuming resistance changes uniformly with temperature? A 280 Ω B 1190 Ω C 1260 Ω D 1370 Ω 26 A slice of bread is placed under a hot electric grill. How does thermal energy reach the bread? A conduction only B radiation only C conduction and convection D convection and radiation 27 Two identical blocks of metal are heated to 20°C and 80°C and p laced in a vacuum. In which scenario will thermal equilibrium between the two blocks be reached in the shortest time? A B C D grill slice of bread 20°C 80°C 20°C 80°C 80°C 20°C 80°C 20°C plastic block www.KiasuExamPaper.com 206

Page 9 of 13 28 A piece of pure ice melts. Which row describes the energy changes of the ice as it melts? internal potential energy internal kinetic energy A increases decreases B decreases increases C increases remains constant D remains constant increases 29 A negatively charged rod is brought close to an isolated T-shaped piece of metal. Initially, the metal is uncharged. Which diagram shows the induced charge on the metal? A B C D 30 The diagram shows the electr