VJC 2022 Prelim P3

1 VICTORIA JUNIOR COLLEGE 2022 JC2 PRELIMINARY EXAMINATIONS Higher 2 Name : _________________________________ CT group : ___________ PHYSICS Paper 3 Longer Structured Questions Candidates answer on the Question Paper. No Additional Materials are required. 9749 / 03 0800 – 1000 h 2 Hours READ THESE INSTRUCTIONS FIRST Write your name and CT group at the top of this page. Write in dark blue or black pen on both sides of the paper. You may use a soft pencil for any diagrams or graphs. Do not use staples, paper clips, highlighters, glue or correction fluid. The use of an approved scientific calculator is expected, where appropriate. Section A Answer all questions. Section B Answer one question only. You are advised to spend one and a half hours on Section A and half an hour on 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 2 3 4 5 6 Section B 7 8 Total (max. 80) This document consists of 20 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 /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., 22 cos () o o v v t xx   = = − electric current I Anvq= resistors in series, R = R1 + R2 + … resistors in parallel, 1/R = 1/R1 + 1/R2+ … electric potential, V = Q/4or alternating current/voltage, x = xo sin  t Magnetic flux density due to a long straight wire d IB   2 0= Magnetic flux density due to a flat circular coil r NIB 2 0= Magnetic flux density due to a long solenoid nIB 0= radioactive decay, x = xoexp(-t) decay constant, 2 1 2ln t=

4 Section A Answer all the questions in the spaces provided. 1. Figure 1.1 below shows a ball of mass 150 g, attached to an elastic cord, being thrown vertically upwards, with