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GCE MAY 2006 : AS 3B Experimental and Investigative Skills (Session 2)

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Centre Number 71 Candidate Number ADVANCED SUBSIDIARY (AS) General Certificate of Education 2006 assessing Module 3B: Experimental and Investigative Skills Session No. 2 ASY33 Physics Assessment Unit AS 3B [ASY33] THURSDAY 18 MAY TIME 1 hour 15 minutes. INSTRUCTIONS TO CANDIDATES Write your Centre Number and Candidate Number in the spaces provided at the top of this page. Turn to page 3 for further Instructions and Information. For Examiner s use only Question Number 1 2 Total Marks ASY3BaS6 2599 Marks BLANK PAGE ASY3BaS6 2599 2 [Turn over Instructions to Candidates Answer both the questions in this booklet. Rough work and calculations must also be done in this booklet. Except where instructed, do not describe the apparatus or experimental procedures. The Supervisor will tell you the order in which you are to answer the questions. Not more than 35 minutes are to be spent in answering each question. In Question 1, you must stop using the apparatus after 33 minutes so that it can be re-arranged for the next candidate. At the end of the 35-minute period you will be instructed to move to the area set aside for the next question. At the end of the Test a 5-minute period will be provided for you to complete the calculations, etc., in either of the questions of the Test, but you will not have access to the apparatus during this time. Information for Candidates The total mark for this paper is 45. Quality of written communication will be assessed in Question 2. Question 1 carries 25 marks, and Question 2 carries 20 marks. Figures in brackets printed down the right-hand side of pages indicate the marks awarded to each part question. ASY3BaS6 2599 3 [Turn over 1 Introduction In this experiment you will investigate the oscillations of different arrangements of identical springs. Aims The aims of the experiment are (a) to obtain the period of oscillation of different arrangements of identical springs, (b) to plot a graph from the experimental results and measure the gradient and intercept of the graph, (c) to determine the spring constant (which is the same for all of these springs). Apparatus Fig. 1.1 shows an arrangement of three identical springs, which has already been set up for you. The springs are suspended from a stand. When set up initially, there is a single upper spring, which supports a set of two springs, connected in parallel. These springs are loaded with a mass of 0.20 kg. On the bench are four more sets of parallel springs, which you will connect, in turn, to the lower set of parallel springs. single spring set of two springs in parallel mass carrier and mass (total mass = 0.20kg) Fig. 1.1 ASY3BaS6 2599 4 [Turn over Procedure Examiner Only Marks Remark Pull the mass on the lower springs down through a few centimetres and release it. This will set the arrangement into vertical oscillations of small amplitude. Take suitable measurements to allow you to determine the period of these oscillations. Record your results in the second column of Table 1.1. Remember to include a heading for this column. Remove the mass from the lower set of springs. Connect another set of springs below the lower set and hang the mass from the bottom of it. Set the arrangement into vertical oscillation and repeat the timing measurements. Record your results in the second line of Table 1.1. Repeat this procedure for the remaining three sets of parallel springs, adding them to the arrangement in turn, so that you now have three, four and then five sets of parallel springs in series in the lower part of the arrangement. Record the results in the appropriate lines of Table 1.1. Calculate the period T of the oscillations of each arrangement of springs and record it in the third column of Table 1.1. Results Table 1.1 Number of sets of parallel springs, n T/s T2/s2 1 2 3 4 5 [7] ASY3BaS6 2599 5 [Turn over Analysis Examiner Only Marks Remark Theory shows that the period of oscillation T is related to the number n of sets of parallel springs by the equation 2 2m 4 2m T2 = n + k k where m is the mass of the load and k is the spring constant. (a) You are to plot a linear graph of T 2 against n on the graph paper of Fig. 1.2. First calculate the values of T 2 from your results and enter them in the right-hand column of Table 1.1. Label the axes of your graph and choose suitable scales. Plot the points and draw the best straight line through them. [5] (b) Use your graph to find the value of the spring constant k. Show your working clearly. Give the value of k, together with its unit. k= ______________________ Unit: ______________________ ASY3BaS6 2599 [4] 6 [Turn over Fig. 1.2 ASY3BaS6 2599 7 [Turn over (c) (i) Explain how you could use your graph to find the period of oscillation of the single spring in the upper part of the arrangement when this spring supports only the 0.20 kg mass. Examiner Only Marks Remark ______________________________________________________ ______________________________________________________ ______________________________________________________ ____________________________________________________ [3] (ii) Hence use your graph to find this period. Period = _________ s [2] (iii) Discuss whether it would be preferable to determine this period from the graph, rather than by direct timing of the oscillations of the single spring. Justify your answer by reference to your result in (c)(ii). ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ____________________________________________________ [4] ASY3BaS6 2599 8 [Turn over Where appropriate, your answer to this question should be in continuous prose. You will be assessed on the quality of your written communication. 2 Examiner Only Marks Remark Planning and design question Introduction A lens forms an image of an object. The linear magnification m of the object is defined by the equation hi m= ho Equation 2.1 where hi is the height of the image and ho is the height of the object. In this question you are asked to design an experiment to show that the magnification is also given by the equation v m= u Equation 2.2 where v is the distance between the image and the lens and u is the distance between the object and the lens. You will have to consider factors affecting the uncertainty in the readings, and to discuss an appropriate range for the readings to be taken. You have been given a convex (converging) lens, the focal length of which has been measured as 100 mm. An illuminated object of height 30 mm is available. (a) State the quantities you propose to measure in your experiment. Do not give experimental detail; you will be asked this in (b). I plan to measure: ___________________________________________ _________________________________________________________ _______________________________________________________ [2] ASY3BaS6 2599 9 [Turn over (b) (i) List the additional equipment you will need to carry out your experiment. Draw a labelled sketch showing how the apparatus will be arranged. Examiner Only Marks Remark ______________________________________________________ [3] (ii) Describe, in detail, the method you propose. ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ____________________________________________________ [3] (iii) State how, by drawing a graph of the expression for m from Equation 2.1 on the x-axis against the expression for m from Equation 2.2 on the y-axis, you could demonstrate that the expressions are equivalent. ______________________________________________________ ______________________________________________________ ____________________________________________________ [2] ASY3BaS6 2599 10 [Turn over (c) (i) State the two different causes of uncertainty which arise when taking readings in your experiment. Examiner Only Marks Remark 1.____________________________________________________ _____________________________________________________ 2.____________________________________________________ ___________________________________________________ [2] (ii) Explain how the uncertainty in a value of the magnification could be determined from the readings taken. ______________________________________________________ ______________________________________________________ ______________________________________________________ ____________________________________________________ [3] (d) (i) Explain why the lens should not be placed less than 100 mm from the illuminated object. ______________________________________________________ ______________________________________________________ ____________________________________________________ [2] (ii) Explain why it would be bad experimental practice to take readings with the lens more than about 200 mm from the illuminated object. ______________________________________________________ ______________________________________________________ ____________________________________________________ [2] Quality of written communication ASY3BaS6 2599 [1] 11 [Turn over S 3/05 2800 302507(173) [Turn over

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Additional Info : Gce Physics May 2006 Assessment Unit AS 3B, Module 3B: Experimental and Investigative Skills (Session 2)
Tags : General Certificate of Education, A Level and AS Level, uk, council for the curriculum examinations and assessment, gce exam papers, gce a level and as level exam papers , gce past questions and answer, gce past question papers, ccea gce past papers, gce ccea past papers

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