HCI Sample B Paper 1

Name: __________________________________ ( ) Class: _____ HWA CHONG INSTITUTION Sample Paper B PHYSICS Paper 1 Level: Secondary Three Duration: 45 mins Do not open this booklet until you are told to do so. INSTRUCTIONS TO CANDIDATES Write your name, class and index number in the spaces provided and shade accordingly on the OMR sheet. 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 answer sheet. Read very carefully the instructions on the answer sheet. INFORMATION FOR CANDIDATES Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Take g to be 10 m s-2 or 10 N kg-1 unless otherwise stated. ___________________________________________________________________________ This question paper consists of 11 printed pages, including this page.

2 1) Two p hysical quantities X and Y share the same physical unit. Which one of the following are possible choices for X and Y? X Y A work power B speed acceleration C force momentum D weight tension 2) The diagram below s hows the observed reading of a pair of vernier calipers when it was used to measure the diameter of a pendulum bob. If this instrument had a positive zero error of 0.02 c m, what is the corrected radius of the pendulum bob? A 0.70 cm B 0.72 cm C 1.40 cm D 1.44 cm 3) The diagram below shows an object O placed in front of a plane mirror. When the mirror is pushed in the direction shown by the arrow while still being parallel to its original position, in which direction does the image of O appear to move? A B C D 1 2 cm 0 10 O eye plane mirror new position of mirror

3 4) The diagram below shows a ray of light entering water from a glass block. Which equation correctly gives the relative refractive index of light passing from glass into water? A s r sin sin C 30sin sin s B r s sin )90sin( − D )90sin( 30sin s−  5) A ray of monochromatic light passes t hrough a circular water droplet as shown in the diagram below. Which one of the following statements is true of the ray of light? A The speed of the light at A is smaller than that in the water droplet. B At B, the light is refracted away from the normal. C Angle C is greater than the critical angle at the water-air boundary. D The angle of incidence at D is greater than its angle of refraction. water glass light source s r 60o ray of monochromatic light water droplet A C D B air

4 6) The table below shows the absolute refractive indices of some materials. material water glycerine glass flint glass absolute refractive index 1.33 1.47 1.54 1.61 A light ray passes from medium 1 into medium 2 and undergoes total internal reflection. Which one of the following is a possible combination of the two media? medium 1 medium 2 A water glass B glass flint glass C flint glass glycerine D glycerine glass 7) The diagram below shows a thin convex lens being used to produce a real image I of an object O. Which position (A, B, C or D) shows a possible position of the principal focus? 8) Which of the following statements is true about a slide projector? I. The image is real and inverted. II. The object is placed at a distance greater than the focal length. III. When the lens is moved further away from the screen, the image becomes smaller. A I and II only. C I and III only. B II and III only. D I, II and III. 9) Which one of the following is not true concerning electromagnetic waves? A Electromagnetic waves can be reflected. B Electromagnetic waves can propagate without a medium. C Electromagnetic waves travel at 3.0 X 108 m/s regardless of medium. D In the same medium, as the wavelength of electromagnetic waves increases, its frequency decreases. 10) One type of electromagnetic radiation which is more ionising than ultraviolet radiation is commonly used as a diagnostic tool in medicine. What is this electromagnetic radiation? A infrared radiation C gamma rays B visible light D X-rays O A B C D I

5 11) A toy car moves from P to Q along the path of a square of side 50 .0 cm as shown in 8.0 s. Which one of the following correctly shows the magnitudes of its average velocity and its average speed? average velocity / m s-1 average speed / m s-1 A 0.070 0.094 B 0.070 0.16 C 0.56 0.094 D 0.56 0.16 12) The graph below shows how the displacement of an object changes with time. At which point on the graph (A, B, C or D) is the object accelerating? 13) A rocket rose vertically from rest on its launching pad with a constant acceleration of 7.0 m s-2. What was its speed after it had travelled 1.54 km? A 22 m s-1 C 150 m s-1 B 100 m s-1 D 310 m s-1 P Q 25.0 cm direction of path C 0 time / s displacement / cm A D B

6 14) An object which was released from an airpl ane reached its terminal velocity after falling for 25 s. Which one of the following statement is true of the object's acceleration? A At 10 s, the object's acceleration was decreasing. B At 20 s, the object's acceleration was increasing. C At 25 s, the object reached its maximum acceleration. D At 50 s, the object's acceleration become constant. 15) A cyclist accelerated down a hill from rest then travelled at constant speed before braking to a halt. Which one of the following graphs best represents the variation of the net force F acting on the cyclist with time t? A C B D 16) The acceleration due to gravity on the Earth and on the m oon is 10 m s-2 and 1.6 m s-2 respectively. How will the following physical properties of an object cha nge if it is brought from the Earth to the moon? inertia density weight A increase decrease decrease B same same decrease C decrease same same D same increase increase F t F t F t F t

7 17) The apparatus shown below was setup on Earth. The setup had a piece of soft iron X of mass 0.040 kg fixed on one end of a uniform beam AB which was pivoted at its mid - point. X was prevented from being pulled down by a fixed magnet by a 0.100 kg load hung at A. If the above experiment is now cond ucted on the m oon where the acceleration due to gravity is 1/6 that of the Earth's. What is the mass of the load at A required to maintain the equilibrium of the beam? A 0.10 kg C 0.40 kg B 0.36 kg D 0.60 kg 18) A slingshot was used to shoo t a stone vertically upward from a point P. It reaches the greatest height at Q before hitting the ground at R. Assuming there is no air resistance, by taking the ground as the reference level for the calculation of gravitational potential e nergy, which one of the following statements correctly describes the energy of the stone? A At P, the stone only has elastic potential energy. B From P to Q, the stone's potential energy is only converted to kinetic energy. C At Q, the stone only has gravitational potential energy. D From Q to R, the stone's kinetic energy is converted back to potential energy. load 0.100 kg A B soft iron X magnet ground R P Q slingshot

8 19) A windmill is