TMJC_2023_H2 Physics_P4_MS

This document consists of 20 printed pages and 2 blank pages. CANDIDATE NAME CIVICS GROUP H2 Physics 9749/04 Paper 4 Practical 24 August 2023 2 hours 30 minutes 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, page 9 and 17. Write in dark blue or black pen on both sides of the paper. You may use an HB pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, glue or correction fluid. Answer ALL questions. You are allowed 1 hour to answer Questions 1 and 2; and you are allowed another 1 hour to answer Question 3. Question 4 is a question on the planning of an investigation and does not require apparatus. Write your answers in the space provided in the question paper. The use of an approved scientific calculator is expected, where appropriate. You may lose marks if you do not show your working or if you do not use appropriate units. Give details of the practical shift and laboratory where appropriate in the boxes provided. The number of marks is given in brackets [ ] at the end of each question or part question. For Examiner’s Use 1 /15 2 /7 3 /21 4 /12 Total /55 Shift Laboratory TAMPINES MERIDIAN JUNIOR COLLEGE JC2 PRELIMINARY EXAMINATION

2 Tampines Meridian Junior College 2023 JC2 Preliminary Examination H2 Physics 1 In this experiment you will be required to investigate the use of a combination of resistors in circuit analysis. Set up the apparatus as shown in Fig. 1.1. Resistor R represents the combined resistance of one to three 10.0 Ω resistors connected in parallel, series or a combination. (a) (i) Set R to be 10.0 Ω. (ii) Attach the crocodile clip K to M. Close the switch and record the voltmeter reading VM. VM = ………0.727 V ……………… (iii) Open the switch. Attach the crocodile clip K to N. Close the switch and record the voltmeter reading VN. VN = ………1.238 V ……………[1] (iv) Calculate the value of MN 11 VV− . MN 11 VV− = 11 0.727 1.238− = 0.568 V−1 MN 11 VV− = …………0.568 V−1…………….. 10.0 Ω V M N K Fig. 1.1 R • Correct dp and units for VM and VN. VN > VM

3 Tampines Meridian Junior College 2023 JC2 Preliminary Examination H2 Physics (v) Repeat steps (a)(ii) to (a)(iii) to obtain further sets of readings for VM and VN by varying R. [5] / R Ω M / VV N / VV 111 MN / VVV −− 11 / R −Ω 3.33 0.362 0.668 1.27 0.300 5.00 0.481 0.949 1.03 0.200 10.0 0.727 1.238 0.568 0.100 15.0 0.872 1.314 0.386 0.0667 20.0 0.979 1.364 0.288 0.0500 30.0 1.109 1.408 0.1915 0.0333 (b) Theory suggests that VM, VN and R are related by the expression MN 11 B CVVR−=+ where B and C are constants. Plot a suitable