2023 JPJC Prelim H2 Phy P2

2023/JPJC/Prelim/9749/02 [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 23 printed pages and 1 blank page. For Examiner’s Use 1 / 9 2 / 9 3 / 11 4 / 9 5 / 10 6 / 10 7 / 22 Total / 80 JURONG PIONEER JUNIOR COLLEGE JC2 Preliminary Examination 2023 PHYSICS 9749/02 Higher 2 29 August 2023 Paper 2 Structured Questions 2 hours Candidates answer on the Question Paper. No additional Materials are required. Name: _______________________________ Class: ______________

2 2023/JPJC/Prelim/9749/02 Data speed of light in free space 810 00. 3 × =c m s–1 permeability of free space 7 0 104 −× =π µ Hm–1 permittivity of free space 12 0 10 85. 8 −× =ε Fm–1 ( )( ) 910 361 −×= π Fm–1 elementary charge 1910 60. 1 −× =e C the Planck constant 3410 63. 6 −× =h J s unified atomic mass constant 2710 66. 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 2310 38. 1 −× =k J K–1 gravitational constant 1110 67. 6 −× =G N m2 kg–2 acceleration of free fall 81. 9=g m s–2

3 2023/JPJC/Prelim/9749/02 [Turn over Formulae uniformly accelerated motion 2 2 1 at uts + = asu v 22 2+ = work done on/by a gas V p W∆ = hydrostatic pressure ghp ρ= gravitational potential GM rφ =− 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. t x xωsin0= velocity of particle in s.h.m. t v vωcos0= 22 0 x x− ± =ω electric current Anvq=I resistors in series ...2 1+ + =R R R resistors in parallel .../ 1 / 1 / 121 + + =R R R electric potential r QV 04πε= alternating current/voltage t x xωsin0= magnetic flux density due to a long straight wire 0 2B d µ π= I magnetic flux density due to a flat circular coil 0 2 NB r µ= I magnetic flux density due to a long solenoid 0Bn µ= I radioactive decay )exp(0 t x xλ− = decay constant 1 2 ln2 tλ =

4 2023/JPJC/Prelim/9749/02 Answer all questions in the spaces provided. 1 (a) (i) Magnetic flux density B generated by a magnet may be f