2021 JPJC Prelim H2 Physics P2

2019/JPJC/PHYSICS/9749 [Turn over Data READ THESE INSTRUCTIONS FIRST Write your name, class and index number on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Answer all questions. 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. This document consists of 21 printed pages. [Turn over For Examiner’s Use 1 / 12 2 / 10 3 / 10 4 / 12 5 / 8 6 / 8 7 / 20 Total / 80 JURONG PIONEER JUNIOR COLLEGE JC2 Preliminary Examination 2021 PHYSICS 9749/02 Higher 2 14 September 2021 Paper 2 Structured Questions 2 hours Candidates answer on the Question Paper. No additional Materials are required. Name: _______________________________ Class: ______________

2 2021/JPJC/Prelim/9749/02 Data speed of light in free space 81000.3 c m s–1 permeability of free space 7 0 104   H m–1 permittivity of free space 12 0 1085.8  F m–1    910361   F m–1 elementary charge 191060.1 e C the Planck constant 341063.6 h J s unified atomic mass constant 271066.1 u kg rest mass of electron 31 e 9.11 10m  kg rest mass of proton 27 p 1.67 10m  kg molar gas constant 31.8R J K–1 mol–1 the Avogadro constant 23 A 6.02 10N  mol–1 the Boltzmann constant 231038.1 k J K–1 gravitational constant 111067.6 G N m2 kg–2 acceleration of free fall 81.9g m s–2

3 2021/JPJC/Prelim/9749/02 [Turn over Formulae uniformly accelerated motion 2 2 1 atuts  asuv 222  work done on/by a gas VpW  hydrostatic pressure ghp  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 k T displacement of particle in s.h.m. txx sin0 velocity of particle in s.h.m. tvv cos0 22 0 xx   electric current AnvqI resistors in series ...21  RRR resistors in parallel .../1/1/1 21  RRR electric potential r QV 04 alternating current/voltage txx sin0 magnetic flux density due to a long straight wire 0 2B d   I magnetic flux density due to a flat circular coil 0 2 NB r  I magnetic flux density due to a long solenoid 0Bn  I radioactive decay )exp(0 txx  decay constant 1 2 ln2 t 

4 2021/JPJC/Prelim/9749/02 50 cm Answer all questions in the spaces provided 1 An object of mass 350 g is released from rest at a heigh