PHYSICS October hour

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MINISTRY OF EDUCATION AND HUMAN RESOURCES, TERTIARY EDUCATION AND SCIENTIFIC RESEARCH MAURITIUS EXAMINATIONS SYNDICATE NATIONAL ASSESSMENT AT FORM III NAME SCHOOL NAME CLASS/SECTION PHYSICS October

1 MINISTRY OF EDUCATION AND HUMAN RESOURCES, TERTIARY EDUCATION AND SCIENTIFIC RESEARCH MAURITIUS EXAMINATIONS SYNDICATE NATIONAL ASSESSMENT AT FORM III NAME SCHOOL NAME CLASS/SECTION PHYSICS October hour Students answer on the Question Paper. The use of calculators is not allowed in this Question Paper. Additional Materials: Mathematical set Ruler READ THESE INSTRUCTIONS FIRST Write your name, the name of your school and your class/section in the spaces provided above. Write in dark blue or black ink. You may use a soft pencil for any diagram, graph or rough working. Any rough working should be done in this booklet. Do not use correction fluid. There are 8 questions in this paper. Answer all the questions. All answers must be written in the spaces provided. Show all your workings. Diagrams are not drawn to scale. Give all your answers using appropriate units wherever applicable. You may assume g = 10 m/s 2. You may also assume that 1 kg weighs 10 N. The number of marks is given in brackets [ ] at the end of each part question. The total of the marks for this paper is 50. Check that this document consists of 11 printed pages and 1 blank page. Any discrepancy in the document must be immediately notified to the responsible officer in your school. MoE&HR, TE&SR & MES 2015

2 Question 1 (5 marks) For each item below, there is only ONE correct answer. Draw a circle around the letter which shows the correct answer. (a) What form of energy is stored in a candle?

2 2 Question 1 (5 marks) For each item below, there is only ONE correct answer. Draw a circle around the letter which shows the correct answer. (a) What form of energy is stored in a candle? A B C D Light Heat Sound Chemical (b) Acceleration is a vector quantity. It has A B C D magnitude only. direction only. both magnitude and direction. neither magnitude nor direction. (c) Kenny uses a measuring cylinder to measure the volume of some water. Fig. 1.1 below shows part of the measuring cylinder he uses. Fig. 1.1 What is the volume of water shown in Fig. 1.1? A 46.5 cm 3 B 46.0 cm 3 C 45.5 cm 3 D 45.0 cm 3

3 (d) According to the laws of reflection, the angle of incidence is A B C D equal to the angle of reflection.

(e) The potential difference across a component in a circuit relates to the A B C D rate of flow of charges in the component.

amount of energy supplied by the cell to the component.

3 3 (d) According to the laws of reflection, the angle of incidence is A B C D equal to the angle of reflection. less than the angle of reflection. greater than the angle of reflection. twice the angle of reflection. (e) The potential difference across a component in a circuit relates to the A B C D rate of flow of charges in the component. amount of energy used by the component. resistance to the flow of charges in the component. amount of energy supplied by the cell to the component. Question 2 (4 marks) Two students conduct an experiment to measure the average speed of the toy cars shown in Fig Fig. 2.1 Complete the table below to indicate: 1. two quantities the students need to measure to be able to find the speed of the toy cars; 2. which instrument they could use to measure each of these quantities. Quantity Instrument [4]

4 Question 3 (3 marks) 4 Kevin holds a card with the word TALL written on it in front of a plane mirror as shown in Fig back of the mirror Fig. 3.1 (a) Which one of the following images of the word TALL will Kevin see in the mirror? Encircle the correct image. [1] (b) State one characteristic of an image formed by a plane mirror which is specifically illustrated in part (a). _ [1] (c) Give one application of the characteristic you mentioned in part (b). [1]

5 5 Question 4 (9 marks) Adil sets up circuit 1 using the components P, Q, R, S and T as shown in Fig T P circuit 1 S A Q R Fig. 4.1 (a) In the table below, name the circuit components P, Q, R, S and T. circuit component name P Q R and S T [4] (b) Components R and S in circuit 1 have resistances 2 Ω and 3 Ω respectively. Calculate the combined resistance of components R and S in circuit 1. combined resistance = [2] (c) Jay uses the same circuit components as Adil to set up circuit 2. However, Jay arranges components R and S in parallel. Calculate the combined resistance of components R and S in circuit 2. combined resistance = [3]

6 Question 5 (8 marks) (a) To find the diameter of a steel ball, Neel arranges three identical steel balls along a graduated ruler as shown in Fig. 5.1. Diagram is not drawn to scale.

6 6 Question 5 (8 marks) (a) To find the diameter of a steel ball, Neel arranges three identical steel balls along a graduated ruler as shown in Fig Diagram is not drawn to scale. steel balls wooden block Fig. 5.1 (i) Use Fig. 5.1 to calculate the diameter of one steel ball. Show all your workings. diameter of one steel ball = [2] (ii) Suggest a reason why Neel uses wooden blocks in the measurement. [1]

7 7 (b) Gary uses a vernier caliper to measure the diameter of a rubber ball as shown in Fig Diagram is not drawn to scale. Fig. 5.2 (i) What is the diameter of the ball which Gary measures? diameter of ball = [3] (ii) State two precautions which have to be taken to get an accurate measurement of the diameter of the rubber ball. Precaution 1: Precaution 2: [2]

8 8 Question 6 (6 marks) A train has an initial speed of 20 m/s. It accelerates uniformly at 0.5 m/s 2 for 30 s. At t = 30 s, it reaches speed v. It then moves at this speed for an additional 15 s. (a) Calculate speed v of the train at time t = 30 s. speed v = [3] (b) On Fig. 6.1, draw a speed-time graph to illustrate the motion of the train. speed/(m/s) time/s Fig. 6.1 [3]

9 Question 7 (9 marks) Nita has a mass of 40 kg. She is at the top of a water slide as shown in Fig. 7.1. The height of the water slide is 12 m. Nita takes 3 s to slide from point A to point C.

9 9 Question 7 (9 marks) Nita has a mass of 40 kg. She is at the top of a water slide as shown in Fig The height of the water slide is 12 m. Nita takes 3 s to slide from point A to point C. A 12 m B 6 m C Fig. 7.1 (a) Calculate the gravitational potential energy of Nita at point A. gravitational potential energy at point A = [3] (b) (i) Assuming the frictional forces acting are negligible, state the kinetic energy that Nita has at point B. kinetic energy at point B = [1] (ii) Explain your reasoning. [2] (c) What is the rate at which Nita loses potential energy while falling from point A to point C? rate of energy loss = [3]

$1 (a) (i) Using your understanding of refraction of light,$

10 10 Question 8 (6 marks) Poka and Ogu go fishing in a river as shown in Fig Poka Ogu Fig. 8.1 (a) (i) Using your understanding of refraction of light, state who is more likely to hit the fish, Poka or Ogu? [1] (ii) Explain why. [2]

11 11 (b) Draw a ray diagram in Fig. 8.2 to illustrate your answer to part (a). Your diagram should include the eye of the observer, arrows to indicate the direction of travel of light and the real and apparent positions of the fish. Label your diagram clearly. air water Fig. 8.2 [3] End of question paper.

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MINISTRY OF EDUCATION AND HUMAN RESOURCES MAURITIUS EXAMINATIONS SYNDICATE NATIONAL ASSESSMENT AT FORM III. PHYSICS October hour

MINISTRY OF EDUCATION AND HUMAN RESOURCES MAURITIUS EXAMINATIONS SYNDICATE NATIONAL ASSESSMENT AT FORM III NAME SCHOOL NAME CLASS/SECTION PHYSICS October 2013 1 hour Students answer on the Question Paper.