GCSE Additional Science June 2008 Physics paper B

For Examiners Use General CertiÞ cate of Secondary Education June 2008 ADDITIONAL SCIENCE PHY2H Unit Physics P2 PHYSICS Unit Physics P2 Higher Tier Wednesday 11 June 2008 1.30 pm to 2.15 pm For this paper you must have: ! a ruler. You may use a calculator. Time allowed: 45 minutes Instructions ! Use black ink or black ball-point pen. ! Fill in the boxes at the top of this page. ! Answer all questions. ! You must answer the questions in the spaces provided. Answers written in margins or on blank pages will not be marked. ! Do all rough work in this book. Cross through any work you do not want to be marked. Information ! The maximum mark for this paper is 45. ! The marks for questions are shown in brackets. ! You are expected to use a calculator where appropriate. ! You are reminded of the need for good English and clear presentation in your answers. Advice ! In all calculations, show clearly how you work out your answer. PHY2H H Surname Other Names Centre Number Candidate Number Candidate Signature (JUN08PHY2H01) G/K32540 6/6/6/6 For Examiners Use Question Mark Question Mark 1 3 2 4567 Total (Column 1) Total (Column 2) TOTAL Examiners Initials2 Areas outside the box will not be scanned for marking (02) G/K32540/Jun08/PHY2H Answer all questions in the spaces provided. 1 (a) The circuit diagram drawn below includes a component labelled X. XV A 0.5 A 9 V 8 Ω 1 (a) (i) Use the equation in the box to calculate the potential difference across the 8 ohm resistor. potential difference = current × resistance Show clearly how you work out your answer. .................................................................................................................................. .................................................................................................................................. Potential difference = ................................................. volts (2 marks) 1 (a) (ii) What is the potential difference across component X? .................................................................................................................................. (1 mark)3 Turn over ! (03) G/K32540/Jun08/PHY2H Areas outside the box will not be scanned for marking 1 (b) The graph shows how the resistance of component X changes with temperature. 40 60 80 0 048 12 16 2026 10 14 18 20 Temperature in °C Resistance in ohms 100 1 (b) (i) What is component X? ................................................ (1 mark) 1 (b) (ii) Over which range of temperatures does the resistance of component X change the most? Put a tick (#) in the box next to your choice. 0 °C to 20 °C 20 °C to 40 °C 40 °C to 60 °C 60 °C to 80 °C 80 °C to 100 °C (1 mark) ____ 54 Areas outside the box will not be scanned for marking (04) G/K32540/Jun08/PHY2H 2 (a) The table gives information about the radioactive isotope, radon-222. mass number 222 atomic number 86 radiation emitted alpha particle 2 (a) (i) Complete the following sentence. The mass number is the total number of ............................................................ and .................................................. inside an atom. (2 marks) 2 (a) (ii) Radon-222 is an isotope of radon. How many protons are there in an atom of radon-222? ................................................ (1 mark) 2 (a) (iii) When an atom of radon-222 emits an alpha particle, the radon-222 changes into an atom of polonium-218. An alpha particle consists of 2 protons and 2 neutrons. How is the structure of the nucleus of a polonium-218 atom different from the structure of the nucleus of a radon-222 atom? .................................................................................................................................. (1 mark) 2 (b) The pie chart shows the average radiation dose that a person in the UK receives each year from natural background radiation. The doses are measured in millisieverts (mSv). Food and drink 0.28 Buildings and soil 0.4 Cosmic rays 0.4 Radon 0.725 (05) G/K32540/Jun08/PHY2H Areas outside the box will not be scanned for marking 2 (b) (i) Calculate the proportion of natural background radiation that comes from radon. Show clearly how you work out your answer. .................................................................................................................................. .................................................................................................................................. Proportion of radon = ................................................. (2 marks) 2 (b) (ii) Not all background radiation is from natural sources. Name one source of background radiation that is not natural. .................................................................................................................................. (1 mark) 2 (c) The bar chart shows the average yearly dose from natural background radiation in different European countries. Austria 0246135 Average yearly dose in mSv France Germany Greece Ireland Portugal Spain UK 2 (c) (i) How many times bigger is the average annual background dose in Germany compared to the UK? .................................................................................................................................. (1 mark) Question 2 continues on the next page Turn over !6 Areas outside the box will not be scanned for marking (06) G/K32540/Jun08/PHY2H 2 (c) (ii) The following table gives the effects of different radiation doses on the human body. Radiation dose in mSv Effects 10 000 Immediate illness; death within a few weeks 1 000 Radiation sickness; unlikely to cause death 50 Lowest dose with evidence of causing cancer A family goes to Germany for a two-week holiday. Should they be concerned about the higher level of background radiation in Germany? Draw a ring around your answer. Yes No Explain your answer. .................................................................................................................................. .................................................................................................................................. .................................................................................................................................. .................................................................................................................................. (2 marks) ____ 107 (07) G/K32540/Jun08/PHY2H Areas outside the box will not be scanned for marking 3 (a) A car driver takes a short time to react to an emergency before applying the brakes. The distance the car will travel during this time is called the thinking distance. The graph shows how the thinking distance of a driver depends on the speed of the car. 20 0 0 10 205 15 10 15 25 5 Speed in m/s Thinking distance in metres 3 (a) (i) What is the connection between thinking distance and speed? .................................................................................................................................. (1 mark) 3 (a) (ii) Many people drive while they are tired. Draw a new line on the graph to show how thinking distance changes with speed for a tired driver. (1 mark) 3 (a) (iii) The graph was drawn using data given in the Highway Code. Do you think that the data given in the Highway Code is likely to be reliable? Draw a ring around your answer. Yes No Maybe Give a reason for your answer. .................................................................................................................................. .................................................................................................................................. (1 mark) Question 3 continues on the next page Turn over !8 Areas outside the box will not be scanned for marking (08) G/K32540/Jun08/PHY2H 3 (b) The distance a car travels once the brakes are applied is called the braking distance. 3 (b) (i) What is the relationship between thinking distance, braking distance and stopping distance? .................................................................................................................................. (1 mark) 3 (b) (ii) State two factors that could increase the braking distance of a car at a speed of 15 m/s. 1 ............................................................................................................................... 2 ............................................................................................................................... (2 marks) ____ 69 Turn over ! (09) G/K32540/Jun08/PHY2H Areas outside the box will not be scanned for marking 4 The diagram shows two oscilloscope traces, A and B. A B Trace A shows how the potential difference between the live and neutral terminals of an electricity supply changes with time. 4 (a) Describe how the potential of the live terminal varies with respect to the neutral terminal of the electricity supply. ............................................................................................................................................ ............................................................................................................................................ (2 marks) 4 (b) What does trace B show? ............................................................................................................................................ ............................................................................................................................................ (1 mark) 4 (c) Each horizontal division on the oscilloscope represents 0.005 s. 4 (c) (i) What is the period of this electricity supply? .................................................................................................................................. Period = .................................. seconds (1 mark) 4 (c) (ii) Calculate the frequency of the supply. .................................................................................................................................. Frequency = .................................. hertz (1 mark) ____ 510 Areas outside the box will not be scanned for marking G/K32540/Jun08/PHY2H 5 A car is driven along a straight road. The graph shows how the velocity of the car changes during part of the journey. –150 +10 –10 –5 +5 +15 Time in seconds Velocity in m/s 8 12 16 4 6 10 14 2 5 (a) Use the graph to calculate the deceleration of the car between 6 and 9 seconds. Show clearly how you work out your answer and give the unit. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ Deceleration = ................................................. (3 marks) 5 (b) At what time did the car change direction? .................................. seconds (1 mark) ____ 4 (10)11 Turn over ! G/K32540/Jun08/PHY2H Areas outside the box will not be scanned for marking 6 Static electricity can be both useful and a nuisance. 6 (a) The diagram shows a method of producing sandpaper using static electricity. Positively charged metal plate Roll of paper Earthed metal plate Sand Glue spray gun Glue droplets Conveyor belt Glue is sprayed onto a moving strip of paper. As the glue leaves the spray gun, the glue breaks up into tiny negatively charged droplets which coat the paper. The sticky paper passes between two metal plates. Sand moving on a conveyor belt also passes between the metal plates. 6 (a) (i) Explain the advantage of having all the droplets of glue negatively charged. .................................................................................................................................. .................................................................................................................................. .................................................................................................................................. .................................................................................................................................. (2 marks) 6 (a) (ii) Explain why the sand moves towards the sticky paper. .................................................................................................................................. .................................................................................................................................. .................................................................................................................................. .................................................................................................................................. (2 marks) Question 6 continues on the next page (11)12 Areas outside the box will not be scanned for marking G/K32540/Jun08/PHY2H 6 (b) People often experience an electric shock when getting out of a car. This happens because charge is generated as they move around on the car seats. On a warm dry day, the potential difference between a driver and the car increases to 10 000 volts. As the driver goes to touch the car door, a spark jumps the air gap, transferring 20 joules of energy between the driver and the car. Use the equation in the box to calculate the initial charge on the driver. energy transformed = potential difference × charge Show clearly how you work out your answer and give the unit. ............................................................................................................................................ ............................................................................................................................................ Charge = ................................................. (3 marks) ____ 7 (12)13 Turn over ! G/K32540/Jun08/PHY2H Areas outside the box will not be scanned for marking 7 The diagram shows a small, radio-controlled, flying toy. A fan inside the toy pushes air downwards creating the lift force on the toy. Lift force Weight = 0.6 N Fan blade Flexible polystyrene base When the toy is hovering in mid-air, the fan is pushing 1.5 kg of air downwards every 10 seconds. Before the toy is switched on, the air is stationary. 7 (a) Use the equations in the box to calculate the velocity of the air when the toy is hovering. momentum = mass × velocity force = change in momentum time taken for the change Show clearly how you work out your answer. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ Velocity = ................................................. m/s (3 marks) Question 7 continues on the next page (13)14 Areas outside the box will not be scanned for marking G/K32540/Jun08/PHY2H 7 (b) Explain why the toy accelerates upwards when the fan rotates faster. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (2 marks) 7 (c) The toy is not easy to control so it often falls to the ground. Explain how the flexible polystyrene base helps to protect the toy from being damaged when it crashes into the ground. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (3 marks) ____ 8 END OF QUESTIONS (14)15 G/K32540/Jun08/PHY2H There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED (15)16 G/K32540/Jun08/PHY2H There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED Copyright © 2008 AQA and its licensors. All rights reserved. (16)