2025 YIJC Prelim H2 Physics Papers 1–4 (QP & Soln)

©YIJC 9749/01/YIJC/PRELIM/2025 [Turn over YISHUN INNOVA JUNIOR COLLEGE JC 2 PRELIMINARY EXAM Higher 2 CANDIDATE NAME CG INDEX NO PHYSICS Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 9749/01 19 September 2025 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, class and index number 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. The document consists of 16 printed pages.

2 ©YIJC 9749/01/YIJC/PRELIM/2025 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 ©YIJC 9749/01/YIJC/PRELIM/2025 [Turn over Formulae uniformly accelerated motion, s = 21 2ut at+ v2 = 2 2u as+ work done on/by a gas, W = pV hydrostatic pressure, p = gh gravitational potential,  = Gm r− temperature, T / K = / 273.15TC + pressure of an ideal gas, p = 21 3 Nm cV  mean translational kinetic energy of an ideal gas molecule, E = 3 2 kT displacement of particle in s.h.m. x = 0 sinxt  velocity of particle in s.h.m., v = 0 cosvt  = ( ) 22 0xx− electric current, I = Anvq resistors in series, R = 12 ....RR++ resistors in parallel, 1 / R = 121/ 1/ ....RR++ electric potential, V = 04 Q r alternating current/voltage, x = 0 sinxt  magnetic flux density due to a long straight wire, B = 0 2 d   I magnetic flux density due to a flat circular coil, B = 0 2r  I magnetic flux density due to a long solenoid, B = 0n I radioactive decay, x = ( )0 expxt − decay constant,  = 1 2 ln2 t

4 ©YIJC 9749/01/YIJC/PRELIM/2025 1 What is the best estimate for the density of an average adult male? A 10−3 g cm−3 B 100 g cm−3 C 103 g cm−3 D 106 g cm−3 2 An aeroplane is stationary at one end of a runway. It accelerates uniformly and takes off 35 s later, having travelled a distance of 560 m. What are the acceleration and take-off speed of the aeroplane? acceleration / m s−2 take-off speed / m s−1 A 0.46 16 B 0.46 32 C 0.91 16 D 0.91 32 3 A tennis ball is hit at point X and then follows the path shown. The air resistance on the ball is negligible. How is the ball moving at its highest point? A It has zero velocity both vertically and horizontally. B It has zero acceleration vertically and non-zero velocity horizontally. C It is accelerating vertically and has zero velocity horizontally. D It is accelerating vertically and has non-zero velocity horizontally.

5 ©YIJC 9749/01/YIJC/PRELIM/2025 [Turn over 4 The figure below shows a uniform block resting on a smooth inclined plane, supported by a force F to prevent it from moving. Which one of the following diagrams correctly shows the force R exerted by the inclined plane on the block?

6 ©YIJC 9749/01/YIJC/PRELIM/2025 5 Blocks A and B are connected by a light cord running over a frictionless, light pulley as shown below. Which of the following statements is correct? A Block A moves down with an acceleration of 9.81 m s–2. B Block A moves up with an acceleration of 3.27 m s–2. C Block B moves up the slope with an acceleration of 3.27 m s–2. D Blocks A and B do not experience any acceleration. 6 A car travels along a road at a constant speed of 25 m s –1. Its power output is 30 kW. The total resistive force on the car is proportional to the square of its speed. What power will be required for the car to travel at a constant speed of 40 m s–1? A 48 kW B 77 kW C 120 kW D 200 kW 7 A small wind turbine contains a generator that is used to generate electricity. Every second, 10.7 kg of air arrives at its blades with a speed of 5.0 m s–1 and leaves the blades with a speed of 2.5 m s–1. The efficiency of the generator is 70%. What could be the output potential difference (p.d.) and current of the turbine? p.d. / V current / A A 8.0 3.0 B 25 2.8 C 25 4.0 D 36 4.0

7 ©YIJC 9749/01/YIJC/PRELIM/2025 [Turn over 8 A disc of radius 6.0 cm rotates about its centre O. P is a point on the circumference and Q is halfway between O and P. At Q, the angular velocity ω is 3.0 rad s–1 and the centripetal acceleration a is 27 cm s–2. Which row gives the values of these quantities at P? ω / rad s–1 a / cm s–2 A 3.0 27 B 3.0 54 C 6.0 110 D 6.0 220 9 A stationary object is released from a point P a distance 3R from the centre of the Moon which has a radius R and mass M. Which one of the following expressions gives the speed of the object hitting the Moon? A 4 3 GM R B 2GM R C 4GM R D GM R Moon R 3R P

8 ©YIJC 9749/01/YIJC/PRELIM/2025 10 The acceleration of free fall on the surface of the Earth is 6 times its value on the surface of the Moon. The mean density of the Earth is 5 3 times the mean density of the Moon. What is the ratio of the radius of Earth to the radius of the Moon? A 1.9 B 3.6 C 6.0 D 10 11 A container filled with an ideal gas is at a temperature of 100 °C. The root-mean-square (r.m.s.) speed of the gas molecules is 350 m s–1. The temperature of the gas is increased to 200 °C. What is the new r.m.s. speed of the gas molecules? A 394 m s–1 B 444 m s–1 C 495 m s–1 D 700 m s–1 12 A sample of an ideal gas is taken through the cycle (P → Q → R → S → P) as shown below. Given that the work done by the gas in process P → Q is 120 kJ, what is the net heat supplied to the gas in one cycle? A −90 kJ B 0 J C 30 kJ D 90 kJ p / kPa V / m 3 P Q R S 1500 250 120 0.05 0.30

9 ©YIJC 9749/01/YIJC/PRELIM/2025 [Turn over 13 The diagram below shows a displacement – time graph of a body performing simple harmonic motion. At which one of the points A, B, C or D, is the body travelling and accelerating in the same direction? 14 A transverse wave moves to the right. X and Y are points in the path of the wave. Which statement about the oscillations at X and at Y is correct? A The oscillations at X and Y are in phase. B The frequency of oscillations at X is greater than the frequency of oscillations at Y. C The oscillations at X and Y have a phase difference of  rad. D The oscillations at X and Y have the same period. A B C D displacement time

10 ©YIJC 9749/01/YIJC/PRELIM/2025 15 Water ripples on a ripple tank approach a narrow gap in a barrier. The width of the gap is equal to the wavelength. Which diagram shows a possible pattern of the ripples after passing through the barrier? A B C D 16 A beam of monochromatic light of wavelength 600 nm is incident normally on a diffraction grating that has 3.0 x 103 lines per centimetre. What i