NYJC_H1_PHY_P1_ANS_KEY

NANYANG JUNIOR COLLEGE JC 2 Preliminary Examination Higher 1 PHYSICS 8866/01 Paper 1 Multiple Choice 23 September 2011 Answer Key No. Ans. No. Ans. 1 A 16 A 2 C 17 D 3 D 18 A 4 B 19 B 5 D 20 D 6 C 21 D 7 A 22 B 8 C 23 D 9 C 24 D 10 B 25 C 11 C 26 D 12 C 27 A 13 D 28 C 14 B 29 D 15 B 30 D

2 © NYJC 2011 8866/01/J2PRELIM/11 NANYANG JUNIOR COLLEGE JC 2 Preliminary Examination Higher 1 PHYSICS 8866/01 Paper 1 Multiple Choice 23 September 2011 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, class and tutor’s name 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 you 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. This document consists of 14 printed pages.

3 © NYJC 2011 8866/01/J2PRELIM/11 Data speed of light in free space, c = 3.00 x 108 m s−1 elementary charge, e = 1.60 x 10−19 C the Planck constant, h = 6.63 x 10−34 J s unified atomic mass constant u = 1.66 x 10−27 kg rest mass of electron me = 9.11 x 10−31 kg rest mass of proton mp = 1.67 x 10−27 kg acceleration of free fall, g = 9.81 m s−2 Formulae uniformly accelerated motion, s = 21 2ut at+ 2v = 2 2ua s+ work done on/by a gas, W = p∆V hydrostatic pressure, p = ρgh resistors in series, R = R1 + R2 + … resistors in parallel, 1/R = 1/R1 + 1/R2 + …

4 © NYJC 2011 8866/01/J2PRELIM/11 1 When a constant potential difference, V (in volts) is applied, the electrical current, I ( i n amperes) through a strip of semiconductor varies with its temperature according to 3= VI pT , where T is the absolute temperature (in Kelvins) and p is a constant. What is the possible unit of p? A J s C-2 K-3 C J s K-3 B J s-1 K-3 D J s-1 C-2 K3 2 The period, T of oscillation of an object suspended freely on a spring is given by: k mT π2= , where m is the mass of object in kg and k is the spring constant in N m-1. A student takes measurements of the period in order to calculate the value of k. Given that the student concluded the value of period T as (1.21 ± 0.03) s and the mass of the suspended object, m is (10.0 ± 0.1) kg, what is the correct way to express the calculated value of k in N m-1? Take π = 3.142. A 269.7 ± 16.1 C 270 ± 20 B 270 ± 16 D 300 ± 20 3 Four students measured and calculated the electronic charge e. The table shows the results obtained. Which student, A, B, C or