YIJC 2023 H2Phy Prelim P1 Question Paper

©YIJC [Turn over YISHUN INNOVA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION Higher 2 CANDIDATE NAME CG INDEX NO PHYSICS Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 9749/01 18 September 2023 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid/tape. Write your name and class on the Answer Sheet in the spaces provided unless this has been done for you. 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 Answer Sheet. Read the instructions on the 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 booklet. The use of an approved scientific calculator is expected, where appropriate. This document consists of 14 printed pages and 2 blank pages.

2 ©YIJC 9749/01/YIJC/PRELIM/2023 [Turn over 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 Formulae uniformly accelerated motion, s = ut + 2 1 at2 v2 = u2 + 2as work done on/by a gas, W = p  V hydrostatic pressure, p =  g h gravitational potential,  = r Gm− temperature, T/K = T/°C + 273.15 pressure of an ideal gas, p = 2CV Nm 3 1 mean translational kinetic energy of an ideal gas molecule, E = kT2 3 displacement of particle in s.h.m. x = xo sin  t velocity of particle in s.h.m., v = vo cos  t =   )( 22 xxo − electric current, I = A n v q resistors in series, R = R1 + R2+………. resistors in parallel, R 1 = ........11 21 ++ RR electric potential, V = r Q o4 alternating current/voltage, x = xo sin  t magnetic flux density due to a long straight wire, B = dπ2 oIμ magnetic flux density due to a flat circular coil, B = r2 No Iμ magnetic flux density due to a long solenoid, B = Ion radioactive decay, x = xo exp(–t) decay constant,  = 12 ln2 t

3 ©YIJC 9749/01/YIJC/PRELIM/2023 [Turn over 1 A micrometer screw gauge is used to measure the diameter of a small uniform steel sphere. The micrometer reading is 6.00 mm ± 0.01 mm. What will be the percentage uncertainty in a calculation of the volume of the sphere, using these values? A 0.2% B 0.3% C 0.5% D 2% 2 A goods train passes through a station at a steady speed of 10 m s −1. An express train is at rest at the station. The express train leaves the station with a uniform acceleration of 0.5 m s−2 just as the goods train goes past. Both trains move in the same direction on straight, parallel tracks. How much time passes before the express train overtakes the goods train? A 6.0 s B 10 s C 20 s D 40 s 3 A cyclist is riding at a steady speed on a level road. According to Newton’s third law of motion, what is equal and opposite to the backward push of the back wheel on the road? A the force exerted by the cyclist on the pedals B the forward push of the road on the back wheel C the backward push of the road on the front wheel D the total air resistance and friction force 4 Two blocks of mass 2.0 kg and 5.0 kg are connected by a light string that is passed over a frictionless pulley. The 2.0 kg block is accelerating up the slope. Given that the friction between the block and the surface of the slope is 7.0 N, what is the tension in the string? A 26 N B 31 N C 39 N D 49 N 30 5.0 kg

4 ©YIJC 9749/01/YIJC/PRELIM/2023 [Turn over 5 A horizontal bar is supported on a pivot at its centre of gravity. A fixed load is attached to one end of the bar. To keep the bar in equilibrium, a force F is applied at a distance x from the pivot. How does F vary with x? A B C D

5 ©YIJC 9749/01/YIJC/PRELIM/2023 [Turn over 6 A cylinder of weight W is placed on a smooth slope. The contact force of the slope on the cylinder is R. A thread is attached to the surface of the cylinder. The other end of the thread is fixed. Which diagram shows the cylinder in equilibrium? A B C D 7 Which statement is correct? A A ball lands on the ground and bounces. The kinetic energy changes sign because the ball changes direction. B A car drives up a rough slope at steady speed. The power generated by the engine equals the gravitational potential energy gained per unit time. C It is possible for an electric heater to be 100% efficient. D It is impossible for momentum to be conserved in a collision.

6 ©YIJC 9749/01/YIJC/PRELIM/2023 [Turn over 8 The mass at the end of a pendulum is made to move in a horizontal circle of radius r at constant speed. The magnitude of the net force on the mass is F. What is the direction of F and the work done by F during half a revolution? direction of F work done by F A towards centre of circle zero B towards centre of circle rF C away from centre of circle zero D away from centre of circle rF 9 A stone of weight 3.0 N is fixed, using glue, to one end P of a rigid rod CP as shown in the diagram. The rod is rotated about end C so that the stone moves in a vertical circle of radius 85 cm. The angular speed  of the rod and stone is gradually increased from z ero until the glue snaps when the tension in it is 18 N. What is the angular speed of the stone? A 2.4 rad s−1 B 7.6 rad s−1 C 9.0 rad s−1 D 58 rad s−1

7 ©YIJC 9749/01/YIJC/PRELIM/2023 [Turn over 10 An object is displaced horizontally to the right in a uniform vertical gravitational field. Which statement describes the change in the gravitational potential energy of the object? A It decreases in direct proportion to the displacement. B It does not change with the displacement. C It increases in direct proportion to the displacement. D It increases in direct proportion to the square of the displacement. 11 A container of ice is heated by an electric heater. The graph below shows the variation of the temperature of the ice with time. Which feature of the graph shows that the specific latent heat of vaporisation of water is greater than its specific latent heat of fusion? A The gradient of the graph at T is greater than the gradient at R. B The length of line S is greater than the length of line Q. C The gradient of the graph at P is greater than the gradient at R. D The value of U is greater than the value of V. P Q R S T temperature time U