IGCSE Sample Examination Paper PHYSICS PAPER 6

Candidate Name:IGCSE Sample Examination PaperPHYSICS PAPER 6 Alternative to Practical 1 hour 15 minutesAnswer questions on the Question Paper.Answer all questions.The questions in this sample were taken from Cambridge IGCSE Physics 0625 Paper 612345Q1 November 2009Q2 November 2009Q2 June 2008Q4 June 2008Q4 November 2008 OUP: this may be reproduced for class use solely for the purchaser’s institute

21The IGCSE class is investigating the period of oscillation of a simple pendulum. Fig. 1.1 shows the set-up.Fig. 1.1              Fig. 1.2ai n Fig. 1.1, measure the vertical distance d from the floor to the bottom of the pendulumObob.d5iiFig. 1.1 is drawn one twentieth actual size. Calculate the actual distance x from the floor tothe bottom of the pendulum bob. Enter this value in the top row of Table 1.1. The students displace the pendulum bob slightly and release it so that it swings. Theymeasure and record in Table 1.1 the time t for 20 complete oscillations of the pendulum(see Fig. 1.2).Table 1.1x/cmt/sT/sT 2/s220.020.019.030.017.940.016.850.015.5[4]bi alculate the period T of the pendulum for each set of readings. The period is the time forCone complete oscillation. Enter the values in Table 1.1. OUP: this may be reproduced for class use solely for the purchaser’s institute

3iicCalculate the values of T 2. Enter the T 2 values in Table 1.1.Use your values from Table 1.1 to plot a graph of T 2/s2 (y-axis) against x/cm (x-axis). Draw the best-fit line.dState whether or not your graph shows that T 2 is directly proportional to x. Justify yourstatement by reference to the graph.statement justification [1][Total: 10] OUP: this may be reproduced for class use solely for the purchaser’s institute

42An IGCSE student is investigating the cooling of thermometer bulbs under different conditions. He places a thermometer in a beaker of hot water and records the temperature uh of the hot water.aFig. 2.1Fig. 2.1 shows the thermometer. Write down the value of uh that it shows.[1]uh He then moves the thermometer until the thermometer bulb is just above the surface of thewater (position A) and immediately starts a stopclock. He records the time t and the temperature reading u every 30 s. The readings are shown inTable 2.1.Table 2.1Position APosition plete the column headings in the table. The student replaces the thermometer in the hot water and then moves the thermometer 15 cmaway from the beaker to position B and immediately starts the stopclock. He records the time tand the temperature reading u every 30 s. The readings are shown in Table 2.1.cState in which position the thermometer bulb cooled more quickly. Justify your answer byreference to the readings.[1]statement justification d[1]To make a fair comparison between the rates of cooling of the thermometer bulbs in the twopositions, it is important to control other experimental conditions. Suggest two conditions thatshould be controlled in this experiment.1. 2. [2][Total: 5] OUP: this may be reproduced for class use solely for the purchaser’s institute

53The IGCSE class is comparing the combined resistance of resistors in different circuitarrangements. The first circuit is shown in Fig. 3.1.aFig. 3.1The current I in the circuit and the p.d. V across the three resistors are measured and recorded.Three more circuit arrangements are used. For each arrangement, a student disconnects theresistors and then reconnects them between points A and B as shown in Figs. 3.2–3.4.Fig. 3.2 Fig. 3.3Fig. 3.4The voltage and current readings are shown in the Table 3.1.Table R/iComplete the column headings for each of the V, I and R columns of Table 3.1.iiFor each circuit, calculate the combined resistance R of the three resistors usingthe equation R 5  V  .I Record these values of R in Table 3.1.[3] OUP: this may be reproduced for class use solely for the purchaser’s institute

6bTheory suggests that, if all three resistors have the same resistance under all conditions, thecombined resistance in circuit 1 will be one half of the combined resistance in circuit 2.iState whether, within the limits of experimental accuracy, your results support this theory.Justify your answer by reference to the results.statement justification iiSuggest one precaution you could take to ensure that the readings are as accurate aspossible. [3][Total: 6]4A student is determining a quantity called the refractive index of the material of a transparent block.Fig. 4.1 shows the ray-tracing sheet that the student is producing. ABCD is the outline of thetransparent block, drawn on the ray-tracing sheet.aFig. 4.1i raw the normal NN’ to side AB, extended to cross side DC, so that the normal is 2.0 cmDfrom A. Label the point F where NN’ crosses AB. Label the point G where NN’ crosses DC.iiDraw the line EF at an angle of 308 to the normal and to the left of the normal NN’. E is apoint outside the block and above AB on the ray-tracing sheet.[3] OUP: this may be reproduced for class use solely for the purchaser’s institute

7bRead the following passage, taken from the student’s notebook and then answer the questionsthat follow.iDraw a line joining the positions of P3 and P4. Continue the line until it meets CD. Label thispoint H.iiMeasure and record the length a of the line GH.a5iii Draw the line HF.iv Measure and record the length b of the line HF.b5c [3]Extend the straight line EF through the outline of the block to a point J. The point J must be atleast 5 cm from the block. The line EJ crosses the line CD. Label this point K.iMeasure and record the length c of the line GK.c5iiMeasure and record the length d of the line FK.d5iii Calculate the refractive index n of the material of the block using the equationn  cb   .adn5[3][Total: 9] OUP: this may be reproduced for class use solely for the purchaser’s institute

85An IGCSE student is determining the focal length of a converging lens. The apparatus is shown in Fig. 5.1.Fig. 5.1aThe student places the lens at a distance x 5 25.0 cm from the illuminated object. She places thescreen close to the lens and then moves it away from the lens until a sharply focused image isformed on the screen. She measures and records the distance y between the lens and the screen. y 5 37.1 cm Calculate the focal length f of the lens using the equationxyf 5 (x 1 y)f5[2]bShe then repeats the procedure with the lens at a distance x 5 30.0 cm from the illuminatedobject. Fig. 5.1 shows this position of the apparatus. It is a scale diagram.iOn Fig. 5.1, measure the distance xs between the lens and the illuminated object. Also on Fig. 5.1, measure the distance ys between the lens and the screen.xs 5ys 5iiCalculate the actual distance y between the lens and the screen.y5 OUP: this may be reproduced for class use solely for the purchaser’s institute

9iii Calculate the focal length f using the new values of x and y.f5iv Calculate the average value of f. Show your working.average value of f 5cThe illuminated object has the shape shown below. Draw a diagram to show the appearance of the focused image in (b) on the screen.[7][1][Total: 10] OUP: this may be reproduced for class use solely for the purchaser’s institute

IGCSE Sample Examination Paper PHYSICS PAPER 6 Alternative to Practical 1 hour 15 minutes Candidate Name: Answer questions on the Question Paper. Answer all questions. The questions in this sample were taken from Cambridge IGCSE Physics 0625 Paper 6 1 Q1 November 2009 2 Q2 Novem