2021 J2 H2 Physics Prelim P2

This paper consists of 26 printed pages Anglo-Chinese Junior College Physics Preliminary Examination Higher 2 CANDIDATE NAME CLASS CENTRE NUMBER S 3 0 0 4 INDEX NUMBER PHYSICS Paper 2 Structured Questions Candidates answer on the Question Paper. No Additional Materials are required 9749/02 26 August 2021 2 hours READ THESE INSTRUCTIONS FIRST Write your Name, Class and Index number in the spaces 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. The use of an approved scientific calculator is expected, where appropriate. 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. For Examiners’ use only 1 / 7 2 / 11 3 / 10 4 / 9 5 / 11 6 / 12 7 / 20 Total / 80

2 Anglo-Chinese Junior College 2021 J2 H2 9749 Paper 2 Preliminary Examination For Examiner’s Use DATA AND FORMULAE Data speed of light in free space, c = 3.00  108 m s1 permeability of free space, o = 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 K1 mol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 [Turn over Anglo-Chinese Junior College 2021 J2 H2 9749 Paper 2 Preliminary Examination For Examiner’s Use Formulae uniformly accelerated motion, s = ut + at 2 v 2 = u 2 + 2as work done on/by a gas, W = p V hydrostatic pressure, p =  g h gravitational potential,  =  temperature T / K = T / oC + 273.15 pressure of an ideal gas p = mean translational kinetic energy of of an ideal gas molecule, E =  displacement of particle in s.h.m., x = xo sin t velocity of particle in s.h.m., v = vo cos t =  electric current I = A n v q resistors in series, R = R1 + R2 +  resistors in parallel, 1/R = 1/R1 + 1/R2 +  electric potential, V = alternating current/voltage, x = xo sin t magnetic flux density due to a long straight wire B = magnetic flux density due to a flat circular coil B = magnetic flux density due to a long solenoid B = radioactive decay, x = xo exp(t) decay consta