HCI S3 Physics EOY 2020 P1

1 Hwa Chong Institution Examinations Secondary 3 Integrated Programme CANDIDATE NAME CLASS REGISTER NUMBER PHYSICS Paper 1 Multiple Choice October 2020 45 mins 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 register number on the Answer Sheet in the spaces below unless this has been done for you. DO NOT WRITE IN ANY BARCODES There are thirty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C or D. Choose the one you consider correct and record your 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 the question booklet. The use of an approved scientific calculator is expected, where appropriate. This document consists of 13 printed pages and 1 blank page.

2 1 The radius of a hydrogen nucleus is 1 x 10-15 m. Which of the following may the radius be expressed in? A 1 x 10-6 nm B 1 x 10-5 nm C 1 x 10-3 nm D 1 x 10-2 nm 2 The figure below shows a section of a micrometer screwgauage when a ball-bearing was gripped between the anvil and the spindle. If the instrument has a zero reading of +0.02 mm, what is the actual diameter of the ball bearing? A 10.15 mm B 10.19 mm C 10.65 mm D 10.69 mm 3 Mr Anderson is measuring the length of a pendulum in an experiment as shown in the figure below. What is the length of the pendulum? A 84.4 cm B 84.5 cm C 84.7 cm D 85.0 cm 10 20 25 20 15 10 84 85

3 4 The figure below shows a student looking at a plane mirror. Which of the following shows the image observed by the student in the plane mirror? A B C D 5 A light ray travels from medium 1 to medium 3 as shown in the figure below. Which of the following list the mediums in order of increasing refractive index? A medium 1, medium 2, medium 3. B medium 1, medium 3, medium 2. C medium 2, medium 3, medium 1. D medium 3, medium 1, medium 2. medium 1 2 3

4 6 The figure below shows two rays of light entering a glass block. Which of the following relationship is correct? A z y x w = B p q x w sin sin sin sin = C q p z y sin sin sin sin = D y z x w sin sin sin sin = 7 Several rays of light traveling in a diamond approached the diamond – air interface at different angles. The magnitude of the angles between the light rays are shown in between the arrows as shown in the figure below . The refractive index of diamond is 2.46. Which of the light ray(s) shown will undergo total internal reflection? A a only. B a, b and c. C b, c and d. D d only. w x y z p q air glass

5 8 The diagrams below show four similar glass prisms (not drawn to scale). The critical angle between the glass prism and air is less than 45 °. Which diagram, showing light passing through the prism is not correct? A B C D 9 The diagram below shows some randomly placed apparatus in a Physics Lab. The following is a list of steps taken by the pupil to find the focal length of a convex lens. (1) Move the object to and fro until a sharp image is formed side by side with it on the screen. (2) Place a plane mirror behind the lens and the screen. (3) Measure the distance between the lens and the screen. (4) Measure the distance between the light source and the plane mirror. Which of the following shows the steps in correct order? A (2), (1), (3). B (2), (1), (4). C (1), (2), (3). D (1), (3), (2). plane mirror light source screen with a triangular slit as an object lens

6 10 A lens is used to read some small print on a book as shown in the figure below. Which of the following statements is incorrect? A The image of the small print is real. B The image distance is longer than the object distance. C The object distance is shorter than the focal length of the lens. D The small print and its image are on the same side of the lens. 11 Which pair includes a vector quantity and a scalar quantity? Vector Scalar A Displacement Acceleration B Force Kinetic energy C Power Speed D Work Potential energy 12 Two forces of magnitudes 3.5 N and 4.5 N act on a point mass. Which of the following cannot be the resultant of the two forces? A 0.5 N B 1.5 N C 4.0 N D 7.0 N 13 Which of the following shows the components of the electromagnetic spectrum, arranged in the order of increasing wavelength? Increasing wavelength A radio waves visible light X-rays B visible light microwave gamma rays C gamma rays radio waves microwaves D X-rays visible light microwaves

7 14 The speed-time graphs of car X and car Y are shown below. Both cars start from the same position. At what time will the two cars meet? A 3 s B 4 s C 5 s D 6 s 15 A man, standing on the top of a cliff by the sea, threw a stone upwards. After some time, the stone hits the sea at the foot of the cliff. The graph belowshows the variation of speed with time after the stone was thrown upwards. X and Y are the values of the area under each triangle while Z is the area of the trapezium from t2 to t3. Which of the following represents the height of the cliff above sea level? A X B X + Y C Z D Y + Z X Y time / s speed / m s-1 Z 0 t1 t2 t3 2 4 6 8 0 0 1 2 3 4 5 6 t / s v / ms-1 Car X Car Y

8 16 The figure below shows two blocks connected by a light and inextensible string S. They move with uniform acceleration of 2 m s-2 under the action of a constant force F on a smooth surface. What will be the acceleration of the blocks if S suddenly breaks? 2 kg block 4 kg block A 6 m s-2 0 m s-2 B 6 m s-2 2 m s-2 C 2 m s-2 0 m s-2 D 2 m s-2 2 m s-2 17 The figure shows forces, F1 and F2, exerted on a glass block placed on a rough table surface with a friction (maximum value) of 15 N. Which pair of forces, F1 and F2 will cause the block to move with constant velocity? F1 / N F2 / N A 30 10 B 40 55 C 60 15 D 70 70 F1 F2 rough table surface 4 kg 2 kg S F

9 18 The diagram below shows a load hanging on a spring balance in a stationary lift . The rea