ASRJC 2026 H2 Physics Prelim P4

1 9478/04/ASRJC/2026Prelim [Turn Over Name: _____________________________ ( ) Class: 26 / ______ 2026 JC2 Preliminary Examination PHYSICS Higher 2 9478/04 Paper 4 Practical 24 August 2026 2 hours 30 minutes You must answer on the question paper. You will need: The materials and apparatus listed on the whiteboard. INSTRUCTIONS • Answer all questions. • Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs. • Write your name, class and index number in the spaces at the top of the page. • Write your answer to each question in the space provided. • Do not use an erasable pen. Do not use correction fluid or tape. • You may use an approved calculator. • You may use a spreadsheet to process and analyse data. • Write the details of the shift and laboratory in the boxes provided. • You will be allowed to work with the apparatus for a maximum of 1 hour 15 minutes for each section. INFORMATION • The total mark for this paper is 50. • The number of marks for each question or part question is shown in brackets [ ]. ANDERSON SERANGOON JUNIOR COLLEGE This document has 16 pages. Any blank pages are indicated. Shift Laboratory For Examiner’s Use 1 2 3 Total (50 marks)

2 9478/04/ASRJC/2026Prelim Section A 1 In this experiment, you will investigate an electrical circuit. You have been provided with a metre rule with a wire attached. You have also been provided with two identical resistors placed in component holders, each labelled X. (a) Measure and record the e.m.f. E of the battery. E = …..…………….………….[1] (b) Measure and record the resistance R of the resistor X. R = …..…………….………….[1] (c) Set up the circuit shown in Figure 1.1. Figure 1.1 The distance between F and G is L. Attach F and G to the wire so that L is 30 cm. Close the switch. Record the value of L and the voltmeter reading V. L = …..…………….………… V = …..…………….………….[2] Open the switch. E X X

3 9478/04/ASRJC/2026Prelim [Turn Over (d) Increase L by changing the position of F on the wire and repeat 1(c). Present your results clearly. [3] (e) L and V are related by the expression EV PV QL− =− where P and Q are constants. Plot a suitable graph using a spreadsheet to determine P and Q. Sketch the graph in the space below. Write down the equation of the trendline. P = …..…………….…………. Q = …..…………….………….[3]

4 9478/04/ASRJC/2026Prelim (f) The resistance of X is R. Theory suggests that P and Q are both inversely proportional to R. A student repeats the experiment using two identical resistors, each with a lower value of R than in the original experiment. For the student’s experiment, draw a second line on the graph in 1(e) to show the expected results. Label this line W. [2] (g) An engineer replaces the battery with a sinusoidal alternating current source and added an ammeter in series with the current source. The engineer’s data is recorded in the digital file: datasetQ1g.xlsx. Imagine you are the engineer. (i) Use the engineer’s data to estimate the charge Q1 that flows through the circuit during the first half period. Q1 = …..…………….…………. [1] (ii) Explain how you obtained the value of Q1. ………………………………………………………………………………….................... ……………………………………………………………………………….………….... [1] [Total: 14]

5 9478/04/ASRJC/2026Prelim [Turn Over Turn over

6 9478/04/ASRJC/2026Prelim 2 In this experiment, you will investigate the oscillations of a wooden strip. (a) Place the wooden strip on the pivot. Adjust the position of the strip until it balances as shown in Figure 2.1. Figure 2.1 The distance between end A and the pivot is a. Measure and record a. a = ……………………………. [1] (b) (i) Set up the apparatus as shown in Figure 2.2. Figure 2.2 Place the nail through one of the holes in the wooden strip. Clamp the nail securely. The distance between the hole and end A of the strip is z. Measure and record z. z = …………………………….

7 9478/04/ASRJC/2026Prelim [Turn Over Displace the bottom of the strip. When the strip is released, it will oscillate as shown in Figure 2.2. Determine the period T of these oscillations. T = ……………………………. [1] (ii) Vary z by placing the nail through different holes in the strip and repeat 2(b)(i). Present your results clearly. [3] (iii) The value of y is given by a – z. It is suggested that T, y and b are related by the expression: T2y = My2 + Mb2 where M and b are constants. Plot a suitable graph using a spreadsheet to determine M and b. Sketch the graph in the space below. Write down the equation of the trendline. M = …..…………….…………. b = …..…………….………….[3]

8 9478/04/ASRJC/2026Prelim (iv) It is suggested that: M = g 24 where g is the acceleration of free fall. Determine g. g = ……………………………. [1]

9 9478/04/ASRJC/2026Prelim [Turn Over (c) A student suggests making a pendulum by attaching a bar magnet to end B of the wooden strip. Design an experiment to determine the period of this pendulum using a coil of wire and a voltage sensor with datalogger. You are not required to do this experiment. Draw a diagram to show the arrangement of your apparatus. State any precautions that should be taken to improve the accuracy of the experiment. Diagram …………………………………………………………………………………………................... …………………………………………………………………………………………................... …………………………………………………………………………………………................... …………………………………………………………………………………………................... …………………………………………………………………………………………................... …………………………………………………………………………………………................... ……………………………………………………………………………………..….................... …………………………………………………………………………………..…….................... …………………………………………………………………………………...……................... ……………………………………………………………………………….….…………......... [4] [Total: 13]

10 9478/04/ASRJC/2026Prelim Section B 3 In this experiment, you will investigate the stability of a container of water as the height of water in the container is changed. (a) Measure and record the diameter d of container A. Use the vernier caliper for this measurement. d = …..…………….……………. [1] (b) (i) A sheet of paper with a scale on it has been provided. Attach the scale to the brick using adhesive tape and place the brick on the metal ruler, as shown in Figure 3.1. Figure 3.1 (ii) Remove the cap from container A. Add a small amount of water to container A so that the height h of water is about 1 cm, as shown in Figure 3.2. Replace the cap. Figure 3.2 (iii) Measure and record the height h using a half-meter ruler. h = …..…………….……………. [1] brick tape scale metal ruler h container A cap water