YIJC 2024 JC2 PRELIM H2 Phy P4 QP

YISHUN INNOVA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION Higher 2 CANDIDATE NAME CG INDEX NO PHYSICS Paper 4 Practical Candidates answer on the Question Paper. Additional Materials: As listed in the apparatus list. 9749/04 26 August 2024 2 hours 30 minutes READ THESE INSTRUCTIONS FIRST This document consists of 7 printed pages and 1 blank page. This - Blank Page - This document consists of 19 printed pages and 1 blank page. Shift Laboratory For Examiner’s Use 1 /11 2 /11 3 /22 4 /11 Total /55 Write your name and class in the spaces at the top of this page. 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, highlighters, glue or correction fluid/tape. Answer all questions. You will be allowed a maximum of one hour with the apparatus for Questions 1 and 2, and a maximum of one hour for Question 3. You are advised to spend approximately 30 minutes on Question 4. Write your answers in the spaces provided on 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, where appropriate, in the spaces provided. Give details of the practical shift and laboratory, where appropriate, in the boxes provided. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question.

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©YIJC 9749/04/YIJC/PRELIM/2024 [Turn over 3 1 In this experiment, you will determine the resistivity of a metal. (a) Set up the circuit as shown in Fig. 1.1. Fig. 1.1 Record the voltmeter reading E. E = ………………………………. V Set up the circuit shown in Fig. 1.2. Fig. 1.2 (not to scale) P and Q are crocodile clips. The distance between the nail and Q is x, as shown in Fig. 1.2. Adjust the position of Q until x is approximately 45 cm. Close the switch. The voltmeter reading is V. Measure and record x and V. x = ………………………………. V = ………………………………. [1] Open the switch.

©YIJC 9749/04/YIJC/PRELIM/2024 4 (b) Vary x by adjusting the position of Q on the wire. For each value of x, measure V. Record your results in a table. [3] (c) It is suggested that V and x are related by the expression: 1 = Ax+ BV where A and B are constants. Plot a suitable graph to determine values of A and B. A = ….…………………………. B = ….…………………………. [5]

©YIJC 9749/04/YIJC/PRELIM/2024 [Turn over 5

©YIJC 9749/04/YIJC/PRELIM/2024 6 [Total: 11] (d) Theory suggests that A is given by the equation 2 4A d ER  =− where d is the diameter of the metal wire, R is 22  and  is the resistivity of the metal. Determine a value for .  = …………………………..  m [2]

©YIJC 9749/04/YIJC/PRELIM/2024 [Turn over 7 2 In this experiment, you will investigate the oscillations of a loaded wooden strip. (a) You have been provided with a rectangular wooden strip with a hole in its centre. Use some of the Blu-Tack to attach the two 100 g masses as near as possible to one end of the strip, as shown in Fig. 2.1 and Fig. 2.2. Fig. 2.1 Fig. 2.2 The distance between the centre of the masses and the hole is d, as shown in Fig. 2.1. Measure and record d. d = ……………………… [1] Blu-Tack

©YIJC 9749/04/YIJC/PRELIM/2024 8 (b) (i) Attach the two 20 g masses to the other end of the strip so that the distance between the centres of these masses and the hole is equal to d. Insert the nail into the hole in the centre of the wooden strip. Set up the apparatus as shown in Fig. 2.3. Fig. 2.3 (not to scale) The distance between the string loop and the nail in the centre of the strip is b. Adjust the position of the string loop and spring until b is approximately 10 cm. Adjust the heights of the bosses until the strip is horizontal and the spring and string loop are vertical. Measure and record b. b = ……………………… [1] (ii) Calculate  where  = b d  = ……………………… [1] 20 g

©YIJC 9749/04/YIJC/PRELIM/2024 [Turn over 9 (iii) Estimate the percentage uncertainty in your value of . percentage uncertainty in  = ………………………… [1] (c) Move the end of the strip with the two 100 g masses vertically down through a short distance. Release the end of the strip. The strip will oscillate up and down. (i) Take measurements to determine the period T of these oscillations. T = ………………………. [2] (ii) Estimate the percentage uncertainty in your value of T. percentage uncertainty in T = ………………………. [1]

©YIJC 9749/04/YIJC/PRELIM/2024 10 (d) Change the value of b to approximately 20 cm. Adjust the heights of the bosses until the strip is horizontal and the spring and string loop are vertical. Measure and record b. b = ………………...………. Repeat (b)(ii) and (c)(i).  = .………………..……… T = ………………...……… [2] (e) It is suggested that the relationship between T and  is = CT where C is a constant. (i) Using your data, calculate two values of C. first value of C = ……………………………. second value of C = ……………….…………… [1]