AMKSS Prelim P3

[Turn Over Candidate Name Form Class Index Number PHYSICS 6091/03 Paper 3 23 August 2024 1 hour 50 minutes Setter: Mrs Yeo Chai Hoon Candidates answer on the Question Paper No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Name, Class and Index Number in the spaces at the top of this page. Write in dark blue or black pen in the spaces provided on the Question Paper. You may use pencil for any diagrams, graphs or rough working. Do not use paper clips, highlighters, glue or correction fluid/tape. Answer ALL questions. All of your answers should be written in this Question Paper: scrap paper must not be used. Graph grids is provided in this Question Paper. Additional sheets of graph paper should be used only if it is necessary to do so. You will be allowed to work with the apparatus for a maximum of 55 minutes for each section. You are expected to record all your observations as soon as they are made. An account of the method of carrying out the experiments is not required. You may lose marks if you do not show your working or if you do not use appropriate units. The use of an approved scientific calculator is expected, where appropriate. At the end of the examination, faster all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. This document consists of 12 pages. For Examiner’s Use Q1 Q2 Q3 Total ANG MO KIO SECONDARY SCHOOL PRELIMINARY EXAMINATION 2024 SECONDARY FOUR EXPRESS

2 AMKSS 4E Prelim Exam 6091/03/2024 Section A 1 In this experiment, you will investigate the cooling rate of water. You have been provided with  two boiling tubes in a rack, each with a water-level marking 10 cm from the bottom  two plasticine (about 2cm tall) placed under the boiling tubes on the rack.  two thermometers  a retort stand, boss and clamp  hot water  a stopwatch  a dropper  a beaker  cloth Set up the apparatus as shown in Fig 1.1 Thermometer A is the thermometer in boiling tube A and thermometer B is the thermometer in boiling tube B. Fig. 1.1 Thermometer A must be held by the clamp and positioned so that the bottom of the bulb is about 1 cm below the water-level marking on the side of the boiling tube. Thermometer B must rest gently on the bottom of the boiling tube. Assemble the setup shown in Fig 1.1.

3 AMKSS 4E Prelim Exam 6091/03/2024 [Turn Over (a) Measure and record the temperature: TA on thermometer A TA = TB on thermometer B TB = [2] (b) Do not change the position of the thermometers. Carefully pour hot water from the beaker into both boiling tubes until the water is level with the marked line on each tube. Measure and record the maximum temperature: TA (MAX) on thermometer A TA (MAX) = TB (MAX) on thermometer B TB (MAX) = [2] (c) Start the stopwatch and wait for 4 minutes. Record the time t, in seconds, on the stopwatch after 4 minutes. t = [1] (d) Read and record the temperature on the thermometers after 4 minutes. State which thermometer shows a smaller temperature decrease from the maximum temperature. TA (4 MIN) on thermometer A TA (4 MIN) = TB (4 MIN) on thermometer B TB (4 MIN) = [2] Thermometer which has a smaller temperature decrease = [1]

4 AMKSS 4E Prelim Exam 6091/03/2024 (e) Suggest two reasons why one thermometer shows a smaller temperature decrease after 4 minutes. 1. ………………………………………………………………………………………… ………………………………………………………………………………………… 2. ………………………………………………………………………………………… ……………………………………………………………………………………….[2]

5 AMKSS 4E Prelim Exam 6091/03/2024 [Turn Over 2 In this experiment, you will determine the resistivity of the wire PQ. You have been provided with • a power supply, • a fixed resistor, • a switch, • an ammeter, • a voltmeter, • a length of resistance wire PQ on a metre rule, • a jockey (crocodile clip), • a digital micrometer screw gauge, • seven connecting leads. Assemble the circuit as shown in Fig. 2.1. Fig. 2.1 Adjust the position of the jockey along the wire PQ so that L = 80.0 cm. With the switch closed, (a) (i) record the ammeter reading I. I = ………………………. [1] (ii) record the voltmeter reading V. V = ……………………….. [1] (iii) Given that the resistance R = V / I, calculate the resistance R of the wire when L = 80.0 cm. R = ………..……………. [1]

6 AMKSS 4E Prelim Exam 6091/03/2024 (b) (i) Using the digital micrometer screw gauge, record the average diameter D of the wire PQ. D = ……………………… [1] (ii) The resistivity of the wire, ρ, is given by the formula: ρ = π R D2 4L Using the values from (a) and (b)(i), determine the resistivity of the wire PQ. ρ = ……………..……….. [1] (c) Plan The circuit is now assembled as shown in Fig. 2.2. Fig. 2.2 It is suggested that the relationship between V and D is where a and b are constants.

7 AMKSS 4E Prelim Exam 6091/03/2024 [Turn Over Using resistance wires with different diameters and the apparatus in Fig. 2.2, plan an experiment to investigate the relationship. Your plan should include • the quantities that you should keep constant, • a detailed description of how you will perform the experiment, • a suitable table in which to display your measurements and calculated values (you do not need to enter any data into the table), • a statement of the graph that you would plot to test the relationship, • a sketch of the graph that you would obtain if the suggested relationship is correct, • an explanation of how you would obtain a value of the constant b from your graph. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. …………………………………………………………………………………………………….

8 AMKSS 4E Prelim Exam 6091/03/2024 ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. …………………………………………………………………………………………………….. ………………………………………………………………………………………………… [5] End of Section A

9 AMKSS 4E Prelim Exam 6091/03/2024 [Turn Over Section B 3 In this experiment, you will investigate a cylinder rolling down a ramp. You have been provided with  a cylinder consisting of two slotted masses taped together  a stopwatch  a ramp, supported by a wooden block  two metre rules that are attac