SSS 4NA Prelim 2022 P2

1 5105/02/SSP/PRELIM/22 SINGAPORE SPORTS SCHOOL PRELIMINARY EXAMINATION 2022 SECONDARY 4 NORMAL (ACADEMIC) CANDIDATE NAME CLASS 4D / 4A2 INDEX NUMBER SCIENCE 5105/02 Paper 2 Physics 18 August 2022 Candidates answer on the Question Booklet. Papers 1 and 2: 1 hour 15 minutes Additional Materials: Nil READ THESE INSTRUCTIONS FIRST Write your class and name on all the work you hand in. Write in dark blue or black pen on both sides of the paper. You may use a pencil for any diagrams or graphs. Do not use correction fluid. Answer all questions in Section A and any two questions in Section B. The use of an approved scientific calculator is expected, where appropriate. In calculations, you should show all the steps in your working, giving your answer at each stage. You are advised to spend no longer than 30 minutes on Paper 1. You may proceed to answer Paper 2 as soon as you have completed Paper 1. At the end of the examination, hand in your answers to Paper 1 and Paper 2 separately. The number of marks is given in brackets [ ] at the end of each question or part question. This document consists of 9 printed pages

2 5105/02/SSP/PRELIM/22 Section A Answer all the questions in the spaces provided. 1 The diagram shows a silver metal pot filled with water and placed directly above a flame that heats the water until it boils. (a) Describe how heat is transferred throughout the water by convection. ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………[3] (b) What is the advantage of having a silver-coloured pot when boiling water? ……………………………………………………………………………………………………… ……………………………………………………………………………………………………[1]

3 5105/02/SSP/PRELIM/22 2 The diagram shows a transverse wave travelling in air through points A and B. The distance between A and B is 40 cm and wave speed is 3.2 m/s. Determine (a) the wavelength wavelength = ……………….. cm [1] (b) the amplitude, amplitude = ……………….. cm [1] (c) the frequency, frequency = ……………………... Hz [2] (d) the time taken for the wave to travel from A to B. time = ……………………. s [1] 20 cm A B

4 5105/02/SSP/PRELIM/22 3 A circuit is set up as shown. (a) When switch S is opened, (i) calculate the total resistance in the circuit. resistance = …………………..  [1] (ii) determine the current flowing through the ammeter. current = …………….. A [1] (b) Switch S is then closed. (i) Calculate the total resistance in the circuit. resistance = ………………  [2] (ii) Will the reading of the ammeter be smaller, greater or the same as that in (