RI 2025 Prelim

Centre Number Index Number Name Class S3016 RAFFLES INSTITUTION 2025 Preliminary Examination PHYSICS (Higher 3) Paper 1 9814/01 25 September 2025 3 hours Candidates answer on the Question Paper. No additional materials are required. READ THESE INSTRUCTIONS FIRST Write your index number, name and class in the spaces provided 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, glue or correction fluid. The use of approved scientific calculator is expected, where appropriate. Section A Answer all questions. You are advised to spend about 1 hour 50 minutes on Section A. Section B Answer two questions only. You are advised to spend about 35 minutes on each question in Section B. 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. For Examiner’s Use 1 (a) / 8 (b) / 7 2 / 6 3 / 5 4 / 8 5 / 6 6 / 6 7 / 6 8 / 8 9 / 20 10 (a) / 10 (b) / 10 This document consists of 34 printed pages. © Raffles Institution 9814/01 [Turn over

2 11 / 20 Total /100 Data speed of light in free space c = 3.00 × 10 8 m s − 1 permeability of free space = 4 π × 10 − 7 H m − 1 permittivity of free space = 8.85 × 10 − 12 F m − 1 = (1/(36 π )) × 10 − 9 F m − 1 elementary charge e = 1.60 × 10 − 19 C the Planck constant h = 6.63 × 10 − 34 J s unified atomic mass constant u = 1.66 × 10 − 27 kg rest mass of electron m e = 9.11 × 10 − 31 kg rest mass of proton m p = 1.67 × 10 − 27 kg molar gas constant R = 8.31 J K − 1 mol − 1 the Avogadro constant N A = 6.02 × 10 23 mol − 1 the Boltzmann constant k = 1.38 × 10 − 23 J K − 1 gravitational constant G = 6.67 × 10 − 11 N m 2 kg − 2 acceleration of free fall g = 9.81 m s − 2 Formulae uniformly accelerated motion s = = moment of inertia of rod through one end I = moment of inertia of hollow cylinder through axis I = moment of inertia of solid sphere through centre I = moment of inertia of hollow sphere through centre I = © Raffles Institution 9814/01

3 work done on/by a gas W = hydrostatic pressure p = ρ gh gravitational potential φ = Kepler’s third law of planetary motion T