(VJC) 2024 H2 Prelim P2

VICTORIA JUNIOR COLLEGE 2024 JC2 PRELIMINARY EXAMINATION Higher 2 Name : __________________________ CT group : ________________ PHYSICS Paper 2 Structured Questions Candidates answer on the Question Paper. No Additional Materials are required. 9749/02 11 September 2024 WEDNESDAY 8 am to 10 am (2 hours) READ THESE INSTRUCTIONS FIRST Write your name and Civics Group 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 or graphs. Do not use staples, paper clips, glue or correction fluid. DO NOT WRITE ON ANY BARCODES. The use of an approved scientific calculator is expected, where appropriate. Answer all questions. The number of marks is given in brackets [ ] at the end of each question or part question. For Examiner’s use Question Mark 1 2 3 4 5 6 7 g Units s.f. Total / 80 This document consists of 28 printed pages

2 Data speed of light in free space c = 3.00 × 108 m s-1 permeability of free space µo = 4 × 10-7 H m-1 permittivity of free space o = 8.85 × 10-12 F m-1 (1/(36)) × 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 me = 9.11 × 10-31 kg rest mass of proton mp = 1.67 × 10-27 kg molar gas constant R = 8.31 J mol-1 K-1 the Avogadro constant NA = 6.02 × 1023 mol-1 the Boltzmann constant k = 1.38 × 10-23 J K-1 gravitational constant G = 6.67 × 10-11 N m2 kg-2 acceleration of free fall g = 9.81 m s-2

3 Formulae uniformly accelerated motion s = ut + (½) at2 v2 = u2 + 2as work done on/by a gas W = pV hydrostatic pressure p = gh gravitational potential GM r =− temperature o/ K / C 273.15TT =+ pressure of an ideal gas 21 3 Nmpc V= mean translational kinetic energy of an ideal gas molecule 3 2E kT= displacement of particle in s.h.m. x = xo sin  t velocity of particle in s.h.m. 0 cos tvv = 22 0x x=  − electric current I = Anvq resistors in series R = R1 + R2 + … resistors in parallel 1/R = 1/R1 + 1/R2+ … electric potential 04 QV r= alternating current/voltage x = xo sin  t Magnetic flux density due to a long straight wire 0 2B d I = Magnetic flux density due to a flat circular coil 0 2 NIB r = Magnetic flux density due to a long solenoid 0B nI= radioactive decay x = xoexp(-t) decay constant 1/2 ln2 t =

4 Answer all the questions in the spaces provided. 1(a) Define the terms moment of a force and torque of a couple . For each of the terms, draw a labelled sketch to illustrate the meaning of the terms. [4] Moment of a force: ………………………………………………………………………………………………… ………………………………………………………………………………………………… Torque of a couple: