ASRJC 2025 Prelim P1 H2 Physics QN paper

1 9749/01/ASRJC/2025Prelim [Turn over Name: _____________________________ ( ) Class: 25 / ______ 2025 JC2 Preliminary Examination PHYSICS Higher 2 9749/01 Paper 1 Multiple Choice Wednesday 3 September 2025 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 16 printed pages and 0 blank page. ANDERSON SERANGOON JUNIOR COLLEGE

9749/01/ASRJC/2025Prelim 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 2

3 9749/01/ASRJC/2025Prelim [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/2025Prelim 1 What is a reasonable estimate of the kinetic energy of a car travelling at a speed of 30 m s–1? A 102 J B 104 J C 106 J D 108 J 2 Readings are made of the current I for different voltages V across a fixed resistor. The results are plotted on a graph to show the variation of I with V. What is the best description of the errors in the readings? A random only B systematic only C both systematic and random D neither systematic nor random 3 The diagram shows a laboratory experiment in which a feather falls from rest in a long evacuated vertical tube of length L. The feather takes time T to fall from the top to the bottom of the tube. How far does the feather fall from the top of the tube in time 0.50T? A 0.13L B 0.25L C 0.38L D 0.50L

5 9749/01/ASRJC/2019MYCT [Turn Over 4 The graph shows the variation of velocity with time for a stone that falls from a bridge into a lake and sinks to the bottom of the lake. What can be deduced about the motion of the stone? A Terminal velocity was reached in air. B The distance travelled in water was greater than the distance travelled in air. C The acceleration in air was decreasing with increasing time. D The rate of change of velocity in air was constant. 5 A box rests on the Earth with forces P, Q, R, S and T acting on them as shown. Newton’s third law describes how forces of the same type act in pairs. Which of the following correctly identifies the pair of forces? A P and S B P and Q C P and R D R and Q P Q R S T

6 9749/01/ASRJC/2025Prelim 6 Water is pumped through a hose pipe at a rate of 90 kg per m inute. It emerges from the hosepipe horizontally with a speed of 20 m s–1. Which force is required from a person holding the hosepipe to prevent it moving backwards? A 30 N B 270 N C 1800 N D 10800 N 7 A rod, made up of 2 uniform portions, A and B, is held in place by a cable under tension, T. The cable is at an angle of 30° to the horizontal. The portions A and B have masses of 20.0 kg and 30.0 kg respectively, and are of identical length, L. What is the tension T in the cable? A 150 N B 190 N C 230 N D 270 N O 2L A B P T 30o

7 9749/01/ASRJC/2019MYCT [Turn Over 8 The solid line on the graph shows how the length of a rubber band varies when an increasing load is applied. The dotted line shows how the length subsequently varies as the load is gradually decreased. Which statement is correct? A The energy recovered when the load is removed is about 10 J. B The energy remaining in the rubber band after one cycle of loading and unloading is about 3 J. C The total work done on the rubber band during one cycle of loading and unloading is about 14 J. D The work done in stretching the rubber band is about 5 J.

8 9749/01/ASRJC/2025Prelim 9 A constant force is applied to a body which is initially stationary but free to move in the direction of the force. Assuming that the effects of friction are negligible, which of the following graphs best represents the variation of P, the power supplied, with time t? A B C D 10 A drone is performing a vertical circular path stunt for its audience on the ground. Which diagram shows the resultant acceleration a acting on the drone at the instant where its velocity is V and speeding up? A B C D 0 t P 0 t P 0 t P 0 t P a a a a V V V v V V v V

9 9749/01/ASRJC/2019MYCT [Turn Over 11 The gravitational field strength on the surface of planet P is one tenth of that on the surface of planet Q. On the surface of P, a body has a mass of 1.0 kg and a weight of 1.0 N. What are the mass and weight of the same body on the surface of planet Q? mass on Q / kg weight on Q / N A 1.0 0.1 B 1.0 10 C 10 10 D 10 100 12 The density of an ideal gas is 1.2 kg m−3 at a pressure of 1.0 × 105 Pa. What is the root-mean-square (r.m.s.) speed of the molecules of the gas? A 350 m s−1 B 500 m s−1 C 3700 m s−1 D 2.50  105 m s−1 13 A fixed mass of an ideal gas undergoes a cycle PQRP of changes, as shown below. Work done by gas from P