2023 HCI Prelim P1 QP

This paper consists of 16 printed pages. HWA CHONG INSTITUTION JC2 Preliminary Examinations Higher 1 CANDIDATE NAME CT GROUP 22S CENTRE NUMBER INDEX NUMBER PHYSICS Paper 1 Multiple Choice Additional Materials: Optical Mark Sheet 8867/01 20 September 2023 60 minutes INSTRUCTIONS TO CANDIDATES Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, CT, NRIC or FIN number on the optical mark sheet (OMS). Shade your NRIC or FIN in the spaces provided. 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 OMS. 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.

2 © Hwa Chong Institution 8867 / 01 / C2 Prelim 2023 Data Formulae speed of light in free space, c = 3.00  10 8 m s 1 elementary charge, e = 1.60  10 19 C 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 the Avogadro constant, NA = 6.02  10 23 mol 1 gravitational constant, G = 6.67  10 11 N m 2 kg 2 acceleration of free fall, g = 9.81 m s 2 uniformly accelerated motion resistors in series resistors in parallel s = ut + 2 1 at2 v 2 = u 2 + 2as R = R1 + R2 + . . . 1/R = 1/R1 + 1/R2 + . . .

3 © Hwa Chong Institution 8867 / 01 / C2 Prelim 2023 1 The SI unit of magnetic flux density is the tesla, T. What are the base SI units of the tesla? A kg s-2 A-1 B kg m s-2 A-1 C kg s2 A-1 D kg m2 s-2 A-1 2 A point source is emitting a steady sound wave uniformly in all directions. A sound intensity meter placed at a distance (2.0  0.1) m away from the source detects an intensity of (0.25  0.05) Wm-2. The equation to determine the intensity I of the light at distance r is given by 24 P rI  , where P is the power of the source. What is the uncertainty of the power of the source? A 0.1 W B 0.3 W C 3 W D 4 W 3 Four students measured and calculated the electronic charge, e. Their results are presented in the table as shown below. Which student obtained a set of results that were accurate but least precise? Student electronic charge, e / x 10-19 C A 1.62 1.59 1.59 1.61 1.60 B 1.57 1.63 1.64 1.58 1.59 C 1.59 1.60 1.58 1