EJC 2026 JC2 H2 PHYSICS PRELIM P2

©EJC 2026 9478/J2H2PRELIM/2026 [Turn over EUNOIA JUNIOR COLLEGE JC2 PRELIM EXAMINATIONS 2026 General Certificate of Education Advanced Level Higher 2 CANDIDATE NAME CIVICS GROUP 2 5 - REGISTRATION NUMBER PHYSICS Paper 2 Structured Questions 9478/02 2nd September 2026 2 hours READ THESE INSTRUCTIONS FIRST Write your name, civics group and registration number on all the work you hand in. The use of an approved scientific calculator is expected, where appropriate. Answer all questions. Write in dark blue or black pen on both sides of the paper. You may use an HB pencil for any diagrams or graphs. Do not use paper clips, highlighters, glue or correction fluid. The number of marks is given in brackets [ ] at the end of each question or part question. This document consists of 22 printed pages and 2 blank page. For Examiner’s Use Q1 8 Q2 8 Q3 7 Q4 9 Q5 7 Q6 11 Q7 6 Q8 19 s.f. P2 Total 75

2 ©EJC 2026 9478/J2H2PRELIM/2026 Formulae uniformly accelerated motion  =+  =+ = = = =− =  + = 2 22 2 1 2 2 / K / C 273 15 1 3 3 2 at u as V p Gm r T T . Nmpc V s ut v Wp F A E kT work done on / by a gas pressure gravitational potential temperature pressure of an ideal gas mean translational kinetic energy of an ideal gas molecule Data speed of light in free space    − −− −− − − − − − − −− − −      = = = =  =   = = = = = = =  81 71 0 12 1 0 91 0 19 34 27 31 e 27 p 11 23 1 A 23 10 m s 10 H m 10 F m 1( 8 99 10 m F 10 C 6 63 10 J s 1 66 10 kg 10 kg 10 kg J K mol 3 00 4 8 85 )4 1 6 02 10 mol 1 60 9 11 1 0 J 67 8 31 1 38 c. . e. . . R. N . h. u. m . m . k − −− − = = 1 11 2 2 2 K 10 N m 6 67 9 kg s81 m G. g. permeability of free space permittivity of free space elementary charge, the Planck constant, unified atomic mass constant, rest mass of electron, rest mass of proton, molar gas constant, the Avogadro constant, the Boltzmann constant, gravitational constant, acceleration of free fall,

3 ©EJC 2026 9478/J2H2PRELIM/2026 [Turn over displacement of particle in s.h.m. ( ) 0 22 00 12 12 12 12 2 2 0 0 0 0 0 0 0 2 2 2 0 1 2 sin cos 1 1 1 1 1 1 1 1 1 2 2 2 1 4 sin 2 2 8 ln2 t t n t x x t v v t x x R R R R C C C C QU QV CV C Q Q e Q Q e RC QV r x x t B d NB r Bn hEn mL e t nAvq RR CC xx             − − − = = =  − ++ = + + = + + ++ = = = =−   = = =  = =  = = = = = = = = I I I I     velocity of particle in s.h.m. electric current resistors in series resistors in parallel capacitors in series capacitors in parallel energy in a capacitor charging a capacitor discharging a capacitor RC time constant electric potential alternating current/voltage magnetic flux density due to a long straight wire magnetic flux density due to a flat circular coil magnetic flux density due to a long solenoid energy states for quantum particle in a box radioactive decay radioactive decay constant

4 ©EJC 2026 9478/J2H2PRELIM/2026 Answer all the questions in the spaces provided 1 A ball falls vertically in air from rest. The variation with time t of distance d moved by the ball is shown in Fig. 1.1. Fig. 1.1 (a) With reference to Fig. 1.1, 1. explain how it can be deduced that the ball is initially at rest, ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ………………………………………………………………………………………………...… [1] 2. explain, with reference to forces acting on the ball, why air resistance is not negligible. ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ...………………………………………………………………………………………………… [2]

5 ©EJC 2026 9478/J2H2PRELIM/2026 [Turn over (b) Use Fig. 1.1 to determine the speed of the ball at a time of 0.40 s after it has been released. speed = ……………………………… m s−1 [2] (c) The same ball is now tossed vertically into the air with velocity V to reach a maximum displacement of 2.0 m. Sketch a graph on the axis below to show the variation with time t of the velocity v of the ball from when it is tossed to when it returns to its original position. Mark the instant at which the magnitude of acceleration is g = 9.81 m s −2 as t1 and the instant at which t he ball returns to original position as t2. No further calculations are required. [3] [Total: 8] t / s v / m s-1

6 ©EJC 2026 9478/J2H2PRELIM/2026 2 (a) State Newton’s second law of motion. ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… …………………………………………………………………………………………...……… [1] (b) At a construction site, sand is allowed to fall vertically from a stationary hopper at a steady rate of 100 g s -1 on to a horizontal conveyor belt. The belt is driven by an electric motor and moves at a constant velocity of 5.0 cm s-1 as shown in Fig. 2.1. Fig. 2.1. (i) Using Newton’s laws of motion, explain why the sand exerts a horizontal force on the conveyor belt. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. …………………………………………………………………………………………… [2] (ii) Show that the magnitude of this horizontal component of force exerted on the sand by the belt is 0.0050 N. [1]

7 ©EJC 2026 9478/J2H2PRELIM/2026 [Turn over (iii) Determine 1. the rate at which the motor does work, P, to keep the belt moving at constant velocity, and P = ……………..….. W [1] 2. the rate at which the sand gains kinetic energy, K. K = …………………W [1] (iv) State the type of collision between the sand and the conveyor belt. With reference to your answers in (b)(iii), describe the energy transfers that occur as the sand is brought to the speed of the belt. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. …………………………………………………………………………………………… [2] [Total: 8]

8 ©EJC 2026 9478/J2H2PRELIM/2026 3 (a) Define electric potential at a point in an electric field. ……………………………………………………………………………………………………… ………………………………………………………………………………………………..…[1] (b) Two charged spheres of radius 2.0 mm are held 4.00 cm apart (centre-to-centre). Fig. 3.1 shows the variation with displacement x, of the electric potential V, between the two charged spheres. The charge on each sphere may be considered to be concentrated at its centre.

9 ©EJC 2026 9478/J2H2PRELIM/2026 [Turn over (i) Using Fig. 3.1, determine the magnitude of the electric field strength at x = 1.00 cm and state its direction. electric field strength = ………………………… N C-1 [2] direction: ……………………………………. [1] (ii) Explain, using Fig. 3.1, how it can be deduced that the charges on the two spheres are equal. ……………………………………………………………………………………………… ……………………………………………………………………………………………[1] (iii) Using Fig. 3.1, determine the charge on each sphere. charge = …………………………….. C [2] [Total: 7]

10 ©EJC 2026 9478/J2H2PRELIM/2026 4 (a) Define the resistance of a circuit component. ………………………………………………………………………………................................. ……………………………………………………………………….………………………….. [1] (b) With reference to energy transfers, distinguish between electromotive force (e.m.f.) and potential difference (p.d). ………………………………………………………………………………................................. ………………………………………………………………………………................................. ……………………………………………………………………….………………………….. [1] (c) Fig. 4.1 shows a circuit containing cell of e.m.f. E with internal resistance r, a fixed resistor with resistance R1 and a variable resistor with resistance R2.