ASRJC 2024 JC2 H2 Physics Prelim P1

1 9749/01/ASRJC/2024PRELIM [Turn Over Name: _____________________________ ( ) Class: 24 / ______ 2024 JC2 Preliminary Examination PHYSICS Higher 2 9749/01 Paper 1 Multiple Choice Monday 16 September 2024 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name and class on the Multiple Choice Answer Sheet. Shade and write your NRIC/FIN. There are thirty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Multiple Choice Answer Sheet. Read the instructions on the Multiple Choice Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this question paper. The use of an approved scientific calculator is expected, where appropriate. This document consists of 18 printed pages and 2 blank pages. ANDERSON SERANGOON JUNIOR COLLEGE

2 9749/01/ASRJC/2024PRELIM Data speed of light in free space c = 3.00  108 m s−1 permeability of free space 0 = 4  10−7 H m−1 permittivity of free space 0 = 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 9749/01/ASRJC/2024PRELIM [Turn Over Formulae uniformly accelerated motion =s 2 2 1 atut + =2v asu 22 + work done on/by a gas =W Vp hydrostatic pressure =p gh gravitational potential = r Gm− temperature T/K = T/C + 273.15 pressure of an ideal gas p =  2 3 1 cV Nm mean translational kinetic energy of an ideal gas molecule =E kT2 3 displacement of particle in s.h.m. x = x0 sin  t velocity of particle in s.h.m. v = v0 cos  t = 22 xxo − electric current I = Anvq resistors in series R = R1 + R2 + … resistors in parallel 1/R = 1/R1 + 1/R2 + … electric potential V = r Q o4 alternating current/voltage x = x0 sin  t magnetic flux density due to a long straight wire B = d o   2 I magnetic flux density due to a flat circular coil B = r No 2 I magnetic flux density due to a long solenoid B = Ino radioactive decay x = x0 exp(–t) decay constant  = 2 1 2ln t

4 9749/01/ASRJC/2024PRELIM 1 When a beam of light is incident on a surface, it delivers energy to the surface. The intensity of the beam is defined as the energy delivered per unit area per unit time. What is the unit of intensity, expressed in SI base units? A kg m–2 s–1 B kg m2 s–3 C kg s–2 D kg s–3 2 The diagram shows two vectors X and Y. In which vector triangle does the vector Z show the magnitude and direction of vector X – Y? A B C D X Y X Y Z X Y Z X Y Z X Y Z

5 9749/01/ASRJC/2024PRELIM [Turn Over 3 When a car driver sees a hazard ahead, she applies the brakes as soon as she can and brings the car to rest. The graph shows how the speed v of the car varies with time t after hazard is seen. Which graph represents the variation with time t of the distance s travelled by the car after the hazard has been seen? A B C D

6 9749/01/ASRJC/2024PRELIM 4 In the absence of air resistance, a stone is thrown from P and follows a parabolic path in which the highest point reached is T. The stone reaches point Q just before landing. The vertical component of acceleration of the stone is A zero at T. B greatest at T. C greatest at Q. D the same at Q as at T. 5 A man is skiing down a slope with constant speed. According to Newton’s third law, which force makes an action−reaction pair with the weight of the man? A the friction from the slope B the normal contact force from the slope C the gravitational force on the Earth due to the man D the sum of normal contact force and friction from the slope

7 9749/01/ASRJC/2024PRELIM [Turn Over 6 An object of weight W is suspended from a newton meter. When the object is completely immersed in water, the newton meter reads P. When the object is completely immersed in oil, the newton meter reads Q. What is the ratio density of oil ?density of water A WP QP − − B QP WP − − C WP WQ − − D WQ WP − −

8 9749/01/ASRJC/2024PRELIM 7 A man throws a ball vertically upwards. The ball reaches a maximum height, and then falls back into the man’s hand. Air resistance may be assumed to be negligible. Which graph shows how the kinetic energy E of the ball varies with the vertical displacement y? A B C D 8 A man drags an object of mass 5.0 kg up a plane inclined at 30° to the horizontal. It travelled through a vertical height of 12 m at a constant speed. The total work done by the man is 1500 J. What is the average friction force between the object and the plane? A 8.3 N B 38 N C 63 N D 88 N 9 A marble moves in a circular path of radius 0.80 m at an angular speed of 2  rad s–1. At t = 0, it passes by point P. What is its displacement from P at t = 6.0 s? A 1.1 m B 1.6 m C 7.5 m D 9.4 m E y E y E y E y

9 9749/01/ASRJC/2024PRELIM [Turn Over 10 A satellite is in an orbit around the Earth. It is moved to a new orbit that is closer to the surface of the Earth. Which of the following correctly describes the changes in the gravitational potential energy and orbital speed of the satellite? potential energy speed A increases increases B increases decreases C decreases increases D decreases decreases 11 Which statement explains why t he thermodynamic temperature scale is considered more fundamental than the Celsius temperature scale? A The thermodynamic temperature scale is determined using the triple point of water instead of ice point, which is more reproducible. B The thermodynamic temperature scale is independent of the properties of materials. C The thermodynamic temperature scale can measure a greater range of temperatures. D The thermodynamic temperature scale is related to the random kinetic energy of the particles. 12 A 20 W filament lamp has been operating normally for an hour so that its temperature is constant. When the first law of thermodynamics is used to quantitatively describe the filament of the lamp after this time, which row correctly describes the application of the first law? rate of increase of internal energy / W rate of heating the filament / W rate of doing work on filament / W A +20 +20 0 B +20 0 +20 C 0 +20 ̶ 20 D 0 ̶ 20 +20 13 Which of the following examples least likely demonstrates resonance occ