HCI Sample A Paper 1

Hwa Chong Institution Examinations Secondary 3 Integrated Programme CANDIDATE NAME CLASS REGISTER NUMBER PHYSICS Paper 1 Multiple Choice SAMPLE PAPER A 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. 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. When necessary, take g to be 10 m s-2 or 10 N kg-1. This document consists of 13 printed pages and 0 blank page.

2 1 An oscillating pendulum is shown below. If it takes 0.25 s to move from O to A, what is the period of the oscillating pendulum? A 0.50 s. B 0.75 s C 1.00 s D 1.25 s. 2 The diagram shows two blocks made from the same material. The weight of the small block is W. What is the weight and the density of the larger block? weight density A 2W 312x W B 2W 312gx W C 3W 38x W D 3W 38gx W

3 3 The diagram shows a tank with a fish at a depth of 25.0 cm from the surface. When the tank was viewed normally from the top by a student, the fish appears to be at a depth of 15.0 cm from the surface. The fish then swims to a depth of 40.0 cm. When viewed normally from the top, what is its apparent depth? A 9.4 cm B 20.0 cm C 24.0 cm D 30.0 cm 4 What is the absolute refractive index for the block of perspex shown in the diagram? A 0.50 B 0.87 C 1.2 D 2.0 5 The focal length of a converging lens is 10.0 cm. What is a possible value for the object distance if the lens is to be used in the diagram shown above? A 20.0 cm B 15.0 cm C 10.0 cm D 5.0 cm

4 6 A cup is placed in front of a window and the view outside is a distant building. Two photos P1 and P2 as shown below are taken with the same single-lens camera. Which of the following statements about the two photos must be correct? A In P1, the images of the cup and the building are on different sides of the lens of the camera. B In P1, the image of the cup is real while that of the building is virtual. C On taking P2, the image distance of the building is shorter than the image distance of the cup on taking P1. D On taking P2, the image distance of the building is longer than the image distance of the cup on taking P1. 7 Which of the following lists only vector quantities? A Energy, mass and force B Acceleration, force and pressure C Time, weight and velocity D Velocity, weight and friction 8 The diagram below shows the forces acting on a toy aeroplane accelerating horizontally at a constant height in the air. Which of the following rows correctly describes the relationship between the forces? Horizontal Vertical A T = FD U = W B T = FD U > W C T > FD U = W D T > FD U > W W T U FD FD: Drag force T: Thrust by engine U: Upward force on wings W: Weight

5 9 Which are the possible applications for the type of electromagnetic waves H and K in the electromagnetic spectrum? Radio waves H Visible light Ultraviolet radiation K Application of H Application of K A Remote control Telecommunication B Detect bone fracture Measuring temperature C Mobile phone communication Cancer treatments D Sterilisation of medical equipment Killing germs and bacteria to preserve food 10 A table–tennis ball is dropped from the same height in a vacuum and then in air. What effect will air resistance have on its time of fall and its average acceleration? time of fall acceleration A increase decrease B increase same C same decrease D same increase

6 11 A ball runs on a frictionless rail from P to Q. Which of the following velocity-time graphs best represents the motion of the ball? A B C D 12 Two identical blocks X and Y are connected by a light string passing over a smooth pulley as shown above. The two blocks are released from rest. After a while, the string is cut. Which of the following correctly describes the motion of the blocks immediately after the string was cut? X Y A stops moving accelerates at 10 m s−2 B moves with constant velocity accelerates at 5.0 m s−2 C accelerates at 10 m s−2 moves with constant velocity D moves with constant velocity accelerates at 10 m s−2 P Q Smooth table

7 13 Two blocks X and Y of weights 6 N and 12 N respectively are suspended by 3 strings as shown in the figure below. A downward force of 4 N is applied to Y. What are the tensions T1, T2, and T3 in the 3 strings? T1 / N T2 / N T3 / N A 3 3 4 B 11 11 12 C 3 3 16 D 11 11 16 14 An electric fan is installed at one end of a trolley and a card is fixed at the other end with the largest surface area of the card facing the fan (Assuming all the air from the fan is directed onto the card) What happens to the trolley when the electric fan is turned on? A The trolley remains stationary. B The trolley moves to the right. C The trolley moves to the left. D The trolley moves to and fro along the ground. X Y T1 T2 T3 4 N Electric fan ground card trolley Air flow

8 15 The photograph below shows a suction hook sticking a hook to a vertical wall. The suction hook is made up of a suction pad and a hook. Which of the following forces balances the gravitational force acting on the suction hook by the Earth? A The friction between the suction pad and the wall. B The force exerted by the air molecules on the suction pad. C The normal reaction exerted by the wall on the suction pad. D The gravitational force acting on the Earth by the suction hook. 16 A railway train engine of mass m moves along a horizontal track with uniform speed v. The total resistive force acting on the engine is F. Which of the following is the power of the engine? A F/(mv) B Fv C (mv)/F D v/F 17 Which of the following statement(s) is/ are correct? I Power is the rate of work done. II Power cannot be created or destroyed. III Power is only found in electrical circuits. IV Power is a measure of the efficiency of objects. A I only. B II and IV only. C III and IV only. D I, II and IV only. Suction pad hook

9 18 The graph below shows 10 g of ice cubes (below freezing point) being heated up from -10˚C to +10˚C. At which temperature is the highest density attained? A - 5.0˚C B 0˚C C 4.0˚C D 10.0˚C 19 When a gas in a cylinder is compressed at constant temperature by a piston, the pressure of the gas exerting on the wall of the cylinder increases. Consider the following three statements. I. The rate at which the molecules collide with the piston increases. II. The average speed of the molecules increases. III. The molecules collide with each other more often. Whic