DHS 2023 H2 Phy P1

1 © DHS 2023 9749/01 [Turn over Name: Centre/Index Number: Class: DUNMAN HIGH SCHOOL Preliminary Examination Year 6 H2 PHYSICS Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 9749/01 25 September 2023 1 hour READ THESE INSTRUCTIONS FIRST Write your centre number, index number, name and class at the top of this page. Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. 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 0 blank page.

2 © DHS 2023 9749/01 [Turn over Data speed of light in free space, c = 3.00 × 108 m s−1 permeability of free space, µo = 4π × 10−7 H m−1 permittivity of free space, εo = 8.85 × 10−12 F m−1 = (1/(36π)) × 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, m e = 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 © DHS 2023 9749/01 [Turn over Formulae uniformly accelerated motion, s = ut + 1 2 at2 v2 = u 2 + 2as work done on/by a gas, W = p∆V hydrostatic pressure, p = ρgh gravitational potential, φ = −Gm/r temperature, T/K = T/oC + 273.15 pressure of an ideal gas, p = 21 3 Nm cV <> mean translational kinetic energy of an ideal gas molecule, E = kT2 3 displacement of particle in s.h.m., x = x 0 sin ωt velocity of particle in s.h.m., v = v0 cos ωt = ±ω 2 2x xo − electric current, I = Anvq resistors in series, R = R1 + R2 + . . . resistors in parallel, 1/R = 1/R 1 + 1/R2 + . . . electric potential, V = r Q oπε4 alternating current / voltage, x = x0 sin ωt magnetic flux density due to a long straight wire, B = 0 2 d Iµ π magnetic flux density due to a flat circular coil, B = 0 2 N r Iµ magnetic flux density due to a long solenoid, B = 0nIµ radioactive decay, x = x0 exp(−λt) decay constant, λ = 1 2 ln2 t

4 © DHS 2023 9749/01 [Turn over 1 A power station generates power at 3.0 GW. What is the energy produced in a time interval of 2.0 ps? A 6.0 x 10-15 TJ B 6.0 x 10-6 MJ C 6.0 x 103 nJ D 6.0 x 106 µJ 2 A stone is thrown with a velocity of 12 m s −1 at an angle of 25o above the horizontal. What is the magnitude of the change in velocity from its starting point to the highest point in its path? A 1.1 m s −1 B 5.1 m s−1 C 5.8 m s−1 D 12 m s−1 3 Car X and Car Y are at a distance apart and they move towards each other with the same initial speed v. The graph shows the variation of velocity of the cars with time. At which time are the cars at their distance of closest approach? Car Y Car X v v velocity time v −v Car Y Car X A B C D

5 © DHS 2023 9749/01 [Turn over 4 Two steel bobs A and B are suspended on strings. Bob A is displaced leftwards as shown. After bob A is released, the bobs collide. Which quantities must be conserved in the collision? A momentum, kinetic energy, and total energy. B kinetic energy and total energy only. C momentum and kinetic energy only. D momentum and total energy only. 5 The pulley in the diagram below is frictionless. What is the magnitude of the acceleration of the system, assuming that air resistance is negligible? A 2.5 m s −2 B 3.7 m s−2 C 6.3 m s−2 D 9.8 m s−2 B A 3.0 kg 5.0 kg

6 © DHS 2023 9749/01 [Turn over 6 A uniform rod has a wooden section and a solid rubber handle as shown. The length of the handle is L, and the length of the wooden section is 4.00 L. The rod balances at 2.90 L from the wooden end. What is the ratio density of rubber density of wood ? A 1.71 B 2.25 C 2.50 D 3.27 7 A vertical tube, closed at one end, is immersed in water. A column of air is trapped inside the tube as shown. The density of water is 1000 kg m -3. What is the difference between the pressure of the air in the tube and the atmospheric pressure? A 1960 Pa B 2940 Pa C 4910 Pa D 7850 Pa 8 The driving force F of a car of mass m causes the car to accelerate. During a time interval of t, it travelled a distance of s and its speed increases from u to v. What is the useful work done by the car’s engine? A Fs B Fs t C mv u −22() 2 D mv u−() 2.90 L L wood rubber 4.00 L

7 © DHS 2023 9749/01 [Turn over 9 A speed boat with two engines, each of power output of 36 kW, can travel at a maximum speed of 12 m s −1. The total drag force D on the boat is related to the speed v of the boat by the following equation: Dv∝ 2 What is the maximum speed of the boat when only one engine is working? A 3.0 m s−1 B 6.0 m s−1 C 8.5 m s−1 D 9.5 m s−1 10 A bead is released from rest at point P and slides along a wire, as shown. The wire loops around and forms a vertical circle of diameter 40 cm. At point Q, the bead is just in contact with the wire. Air resistance and friction on the wire are negligible. What is the height h from which the bead is released? A 0.30 m B 0.40 m C 0.50 m D 0.60 m 11 What is the mean speed and the mean angular velocity of the Earth in its orbit around the Sun? The mean radius of the orbit is 1.50 x 10 11 m. speed / m s−1 angular velocity / rad s−1 A B C D 2.99 x 104 2.99 x 104 1.09 x 107 1.09 x 107 1.99 x 10-7 7.27 x 10-5 7.27 x 10-5 1.99 x 10-7 not to scale

8 © DHS 2023 9749/01 [Turn over 12 The diagram shows a point P midway between the centre of the Earth and the centre of the Moon. Which statement is true at point P? A The gravitational field points towards the Moon. B The gravitational field strength is zero. C The gravitational potential is negative. D The gravitational potential is zero. 13 Object A is dropped into a thermally insulated container of water and allowed to come to thermal equilibrium with the water. The experiment is repeated with a different object B. The mass and initial temperature of water are the same in the two experiments . The mass and initial temperature of object s A and B are also the same. The following graphs show the variation with time of the temperature of the objects and the water. If c A and cB are the specific heat capacities of object A and object B respectively, what is the ratio of A B c c ? A 0.38 B 1.5 C 2.0 D 2.7

9 © DHS 2023 9749/01 [Turn over 14 What is the internal energy of a system? A The total kinetic energy of the system. B The energy of the atoms of the system. C The total potential energy of the system. D The amount of heat supplied to the system. 15 An ideal gas has a volume of 3.7 m 3 and contains 1.5 kg of n