2024 CJC H1.Phy.PRELIM_P1

PHYSICS 8867/1 Paper 1 Multiple Choice 12 September 2024 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name and tutorial group on this cover page. Write and/or shade your name, NRIC / FIN number and HT group on the Answer Sheet (OMR sheet), 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 (OMR sheet). 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 13 printed pages and 1 blank page. [Turn over NAME CLASS 2T Catholic Junior College JC2 Preliminary Examination Higher 1

2 Data speed of light in free space, c = 3.00  108 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  1023 mol1 gravitational constant, G = 6.67  1011 N m2 kg2 acceleration of free fall, g = 9.81 m s2 Formulae uniformly accelerated motion, s = ut + 1 2 at2 v2 = u2 + 2as resistors in series, R = R1 + R2 + . . . resistors in parallel, 1/R = 1/R1 + 1/R2 + . . .

3 [Turn over 1 Which estimate is not realistic? A The power of a hair dryer is 150 W. B The kinetic energy of a running man is 2000 J. C The weight of a can of soft drink is 4 N. D The density of ice is 900 kg m─3. 2 Prefixes are often used to represent powers of 10 when writing the units of quantities. For example, 6.0 microampere, that is, 6.0  10-6 A, is written as 6.0 μA, where μ is the prefix symbol for 10-6 A. Which prefix is not one of the standard symbols? A g B p C m D T 3 To find the resistivity of a semi-conductor, a student makes the following measurements of a cylindrical rod of a material. length = (25 ± 1) mm diameter = (5.0 ± 0.1) mm resistance = (68 ± 1) Ω He calculates the resistivity to be (5.34  10-2) Ω m. How should the uncertainty be included in the student’s statement of the resistivity of the semi-conductor? A (5.34 ± 0.07)  10-2 Ω m B (5.34 ± 0.05)  10-2 Ω m C (5.3 ± 0.4)  10-2 Ω m D (5.3 ± 0.5)  10-2 Ω m

4 4 A ball is released from rest at time zero. After 1.0 s, it hits a horizontal surface and rebounds, reaching the top of its first bounce after 1.5 s. What is the displacement of the ball from its original position after 1.5 s? A 1.25 m B 3.75 m C 5.00