HCI 2014 P1

1 Name: __________________________________ ( ) Class: _____ HWA CHONG INSTITUTION END-OF-YEAR EXAMINATION 2014 PHYSICS Paper 1 Level: Secondary Three Duration: 45 min Do not open this booklet until you are told to do so. INSTRUCTIONS TO CANDIDATES Write your name, class and index number in the spaces provided and shade accordingly on the OMR sheet. There are thirty 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 soft pencil on the answer sheet. Read very carefully the instructions on the answer sheet. INFORMATION FOR CANDIDATES Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Take g to be 10 m s-2 or 10 N kg-1 unless otherwise stated. ___________________________________________________________________ This question paper consists of 10 printed pages, including this page

2 1. The diagram below shows the observed reading of a micrometer screw gauge. If the mircrometer is found to have a zero error of +0.03 mm, what is the corrected reading? A 2.20 mm B 2.23 mm C 2.70 mm D 2.76 mm 2. Which of the following correctly lists one scalar and one vector quantity? 3. Fig 3.1 shows a right -angled prism being used to deflect a ray of light entering normally into the prism. Which ray in Fig 3.2 correctly shows the emergent ray for the same incident ray if the material used for the prism is replaced by one having a smaller refractive index? 4. A converging lens of focal length 15 cm produces an image 30 cm from the lens. How far is the object placed from the lens? A 10 cm B 15 cm C 30 cm D 45 cm Scalar quantity Vector quantity A Displacement Work B Energy Force C Force Acceleration D Velocity Weight Fig 3.1 Fig 3.2

3 5. The figure below shows four rays which have passed through a lens. Three rays came from point Y, but one ray came from point X. which ray came from point X. 6. Converging lens B has the same focal length as converging lens A, but only half the diameter. Both lenses are used, separately, to form two images of a tree on a screen. Which one of the following statement about the images is correct? A The images are both real and inverted. B The images are of the same brightness. C Image B is bigger than the image A. D Image B is not as sharply focused as image A. 7. The diagram below shows the position of a string at a particular instant of time as a transverse wave travels along it from left to right. Which one of the following correctly shows the direction of the velocities of the points 1, 2 and 3 on the string? 1 2 3 A    B    C    D    1 1 2 3

4 8. X and Y are different wave motions. In air, X travels much faster than Y but has a shorter wavelength. Which types of wave motion could X and Y be? 9. Which of the following is an application of microwaves in everyday life? A endoscopy B radiography C photography D telecommunication 10. Radio waves, visible light and X rays are all part of the electromagnetic spectrum. What is the correct order of increasing wavelength? shortest longest A radio waves visible light X rays B radio waves X rays visible light C X rays radio waves visible light D X rays visible light radio waves 11. Which is true when ice changes to water at 0 oC ? A Work is done in weakening the intermolecular forces. B The specific latent heat increases. C The ice molecules vibrate faster. D Thermal energy is released to the surroundings. 12. A piece of iron of mass m and specific heat capacity c, and a piece of aluminium of mass 2m and specific heat capacity 2c, each received the same quantity of heat. The temperature of the aluminium rose by 8 K. By how much did the temperature of the iron rise? A 4 K B 8 K C 16 K D 32 K X Y A Sound Ultraviolet B Ultraviolet Radio C Yellow light Sound D Radio Infrared

5 13. A solid is heated from a temperature below its melting point to a temperature above its melting point. Which graph correctly shows the relationship between the average kinetic energy of the molecules and the amount of thermal energy supplied? 14. A space shuttle is covered by “heat shields” over its body so as to protect the interior from getting too hot while entering the atmosphere of the Earth. Which of the following thermal properties is/are desirable for the material of the “heat shields”? I It should be a good conductor of thermal energy. II It should have a very high melting point. III It should have high specific heat capacity. A I only B III only C I and II only D II and III only 15. Steam burns are more damaging than burns caused by boiling water because steam A has a higher temperature than boiling water. B has more energy per kilogram than boiling water. C has a higher specific heat capacity than water. D is a vapour of water molecules. A C B D Thermal Energy / J KE / J Thermal Energy / J KE / J Thermal Energy / J KE / J Thermal Energy / J KE / J

6 16. A vapour in a container is at a high temperature and loses thermal energy to its surroundings. The graph shows how its temperature changes over the next few minutes. Which feature of the graph indicates that the specific latent heat of vaporisation of the substance is greater than its specific latent heat of fusion? A The gradient of the graph at P is greater than the gradient at R. B The gradient of the graph at T is greater than the gradient at R. C The length of the line Q is greater than the length of the line S. D The value of X is greater than the value of Y. 17. How can the sensitivity of a liquid-in-glass thermometer be increased? A Use a thinner-walled bulb B Use a tube with a narrower bore C Use a longer tube D Use a liquid that is a better thermal conductor 18. A plastic ruler feels warmer than a metal ruler because A the metal ruler conducts thermal energy away from your hand faster. B the molecules in the metal ruler are less energetic. C the metal ruler has a shinier surface. D the metal ruler is a worse radiator of thermal energy. 19. Which method will not produce convection currents in a container filled with water at 30 oC? A Placing a lighted bulb just above the water surface B Dropping a piece of hot metal into the water C Lighting a candle beneath the container D Floating a piece of ice on the water

7 t/s t/s t/s t/s 20. On a hot day, a drink in a bottle can be kept cool by standing it in a bowl of water and placing a wet cloth over it. How is the drink kept cool? A Hot air cannot get into the bottle. B The cloth conducts heat from the bottle into the water. C The drink cannot evaporate from the bottle. D Water evaporating from the cloth cools the drink. 21. A swimmer starts at point P and swims at 1.2 m/s across a river in the direction towards Q. P is directly facing Q, on the opposite bank of the river of width 60 m. The current in the river is 1.2 m/s. When the swimmer finally reaches the opposite bank, he discovers that he is at R instead of Q. The distance QR is A 30 m B 50 m C 60 m D 72 m 22. A particle is undergoing uniform acceleration. Which of the following graph describes its displacement with time? Q R 1.2 m/s 1.2 m/s 60 m current