UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education CANDIDATE NAME CENTRE NUMBER ITIJJJ CANDIDATE NUMBER *0\_ o PHYSICS -J_ (X) Paper 6 Alternative to Practical (J1 10_ (J1 Candidates answer on the Question Paper. o No Additional Materials are required. "- w * READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams or graphs. Do not use staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ 1 at the end of each question or part question. 0625/62 October/November 2012 1 2 3 4 5 1 hour Total This document consists of 12 printed pages. DC (LEO/JG) 50193/4 UCLES 2012 g UNIVERSITY of CAMBRIDGE ~ International Examinations [Turn over
1 The IGCSE class is carrying out refraction experiments using a rectangular glass block and optical pins. 2 (a) In the middle of the space below, draw a line, 10cm long, across the page and label it AB. This line represents one side of the glass block. (b) Draw a normal to this line at the centre of AB. [1] [1] (c) Draw a line at 30 to the normal to represent an incident ray. This line should be at least 6cm long. Label this line EF. [1] (d) Mark the positions of two pins P1 and P 2 on line EF. They should be positioned at suitable places on the line in order carry out a ray-tracing experiment as accurately as possible. [1] UCLES 2012 0625/62/0/N/12
3 (e) A student finds that his completed results from the refraction experiment do not quite match the theory. The student carried out the experiment correctly and with reasonable care. Suggest a practical reason why the results could differ slightly from the results expected from the theory.... :$.cl(tlfs.~ ~-:f 4~nL.s.().f..~.~~c;J...I~~.d....~~d< JI.,.(.~ ~. Pins.... D..~f.fi.w'tyin r:rt:jd.,~'protr~ctt)r.-j;..bdrv.:-. [1] 1:J,af\ 2 6 [Total: 5] ~( ) N of lil~t r~.s UCLES 2012 0625/62/0/N/12 [Turn over
4 2 An IGCSE class is investigating the rate of cooling of water. The apparatus is shown in Fig. 2.1. ~ ~ @ thermometer water ------ Fig. 2.1 Fig. 2.2 (a) Record room temperature e R as shown on the thermometer in Fig. 2.2. g 0... fa g ~ g 0 N ~ 0 0,. e R = 2l..~C [2] (b) A student pours 200cm 3 of hot water into a beaker. She records the temperature eo of the water. _ eo - 86 C. She starts a stopclock and records the temperature e 1 of the water at time t = 100 s. _ 72 C e 1 -......... (i) Calculate the temperature difference e A between eo and room temperature e R using the equation e A = (eo - e R ). o e A = 6..3. C. (ii) Calculate the temperature fall e H of the hot water using the equation e H = (eo - e 1 ). UCLES 2012 0625/62/0/N/12 Q _ /,.0 uh -, C. [1]
5 (c) The student empties the beaker. She pours 100cm 3 of hot water into the beaker, adds 100 cm 3 of cold water to the beaker, and stirs. She records the temperature e 2 of the warm water. _ 59 C e 2 -. She starts the stopclock and records the temperature e 3 of the water at time t = 100 s. _ 44 C e 3 -. (i) Calculate the temperature difference the equation e B = (e 2 - e R ). e B between e 2 and room temperature e R using e B = b 36 c. (ii) Calculate the temperature fall e w of the warm water using the equation fjyy = (e 2 - e 3 ) Suggest two such conditions that should be controlled. 1.e>:~r~~m~~(f:>:r..q-re",'kQhIf/A1;I fjyy=!5 ~C. [1] (d) The student suggests that the rate of temperature change is proportional to the difference between the starting temperature and room temperature. This can be expressed as e A _ e B e H - e w State whether the results support this suggestion and justify your answer with reference to the results. statement NO. justification ~.C fti.:fio ;.$. -fo.q d..i.~r:.~v.af.~. Nl;!tc(out.JAo'1J,.qj::tVL{-~!15~)i2i (e) If this experiment were to be repeated in order to check results, it would be important to control the conditions. 2 ~tn.i.b~.l...~ ~..w.t?ikr.:. -A-movn1- f,sfirrir:j [2] _ If [Total: 8] - Ut'N2 ;~ftyv~ _ Harr IVOI (O/YYOwJ I ttvafur- - ~ U2(S().~t:JJI ~/~o.knai /botkh-~ UCLES 2012 0625/62/0/N/12 [Turn over itc:n..)
3 The IGCSE class is investigating current and potential difference using identical lamps in a circuit. The circuit is shown in Fig. 3.1. 6 power source 2 (a) On Fig. 3.1, draw the symbol for a voltmeter connected to measure the potential difference V across the combination of lamps. [1] (b) On Fig. 3.2, draw a pointer showing the voltmeter reading V = 1.9V. 3 Fig. 3.1 '/1----- 0.6.8 1. 0 1.2 1.4 0.4 1.6 0.2 1.8.0 Fig. 3.2 (c) (i) A student measures the current at positions 1, 2 and 3 in the circuit. Record the current at each position as shown on the ammeters in Fig. 3.3. [1] position 1 position 2 position 3 UCLES 2012 Fig. 3.3 12 = O 3.3.A. 0625/62/0/N/12 13 = 0..5.0..& [1]
7 (ii) Calculate the total current Ic in the combination of lamps using the equation Ic = 12 + 1 3, Ie =- 0.33 +- a.so Ic = 0 8..3 A. (iii) Theory indicates that 11 = Ic' Suggest why a student may find the two values to be different in this experiment.... ~ am~.djv. i4..~ ~ 2er.o e.rydr.... o.c:. Hd:ffic...IJyi'fJr:ead.v:t!jH(f!f.,V.d.kwilt-.tt;, I (d) The student decides to investigate the effect of changing the current 1 1, using a variable ~r (rheostat). - In the space below. copy the diagram shown in Fig. 3.1. but with the addition of a variable resistor connected at a suitable position for the investigation. PoVo't.V S-oura ~-----------4V ~ -J (e) A student sets up the circuit as shown in Fig. 3.1. Neither of the two lamps in series glows. He suspects that one of the lamps is faulty. [2] p./~a:) Suggest how the apparatus may be used to find out which lamp is faulty.... S~.o.r..t (A.~ f. ~ i~ w.r.(1. ~ C.A.r.~ ~~.f. c.hp.~~~f.arfiin,bracacwtri ~ Or p.j -tiv ~J i." (la~,f 0Mcl ClvldtJotal:7] UCLES 2012 0625/62/0/N/12 [Turn over
8 4 The IGCSE class is determining the focal length of a lens. The apparatus is shown in Fig. 4.1. illuminated ObjeC~,-_(_lens ceen u.:.. v. Fig. 4.1 A student places a lens at a distance u = 30.0cm from an illuminated object. She moves the screen until a sharply focused image of the object is seen on the screen. She measures the distance v between the centre of the lens and the screen. She calculates d, using the equation d = u + v. She repeats the procedure using a range of values of u. The values of u, vand d are shown in Table 4.1. u/cm v/cm Table 4.1 uv/c.. 30.0 29.8 8C('-t 59.8 45.0 22.0 9'(0 67.0 50.0 21.8 1090 71.8 55.0 21.0 /1 '3 5 76.0 60.0 19.9 I, 94 79.9 z. d/ em (a) (i) Calculate the value of uv for each set of readings and enter the values in the table. (ii) Complete the column headings in the table by inserting the units for uv and d. [2] UCLES 2012 0625/62/0/N/12
9 2 uvlgm. \I 00, 000 90D cgoo 55 '0" S- ~S - S T = ( '22 S) =10 +5 d/ c-: (c) The gradient of the graph is numerically equal to the focal length of the lens. 1'2.00-8 0 = (350) (i) Determine the gradient G of the graph. Show clearly on the graph how you obtained the necessary information. 2- G- = 150 -, 15.'55 CW\ z.2.~~ G = Ls..~.S..? ~ [2] (ii) State a value for the focal length f of the lens, giving your answer to a suitable number of significant figures for this experiment. _. /5.6 em [4] f - [2] [Total: 10] UCLES 2012 0625/62/0/N/12 [Turn over
10 5 The IGCSE class is investigating a pendulum. The apparatus is shown in Fig. 5.1. clamp pendulum bob Vllllllllillii bench (a) On Fig. 5.1, measure the length / of the pendulum. u: (b) The diagram is drawn 1/5 th actual size. Calculate Fig. 5.1 the actual length L of the pendulum. 10.5 X S = '5 2. ') 0\1"./ Va. / =.!.Q.5 m..m [1] ( or 10. S Cm) _. 5" 2.5 1" _ L - \.N.J\ [2] UCLES 2012 0625/62/0/N/12
11 (c) A student places a metre rule on the bench so that the 50.0cm mark is vertically below the centre of the pendulum bob. Describe how you would judge that the 50.0 cm mark is vertically below the centre of the pendulum bob. You may draw a diagram.... u.k b..lp..cl.k.r. o..r: ().'(:ljf.t:;:j...c.1br.. 'k? emj()..w:...t!..~-r.6~~..(df;;".()il [1] (d) The student pulls the pendulum bob to one side until it is vertically above the 52.0cm mark on the rule. He has moved the pendulum bob a horizontal distance d = 2.0cm. He releases the pendulum bob, then measures the time t taken for 12 complete swings of the pendulum. He repeats the procedure using a range of d values. The values of d and t are shown in Table 5.1. Table 5.1 d/ UM ti S T/ S 2.0 17.4 I.t.. S 3.0 17.6, '~"7 4.0 17.2 I. ~'l 5.0 17.3 I.~ 4 6.0 17.5 I. ''h~ (i) Calculate the period..i..2f the pendulum for each value of d. Enter the values in the table. The period J is the time taken for one complete swing of the pendulum. [2] (ii) Complete the column headings in the table. [1] (e) Using the evidence in the table, describe the effect on the period T of increasing the distance d. Justify your answer by referencejo your results. (y\ or phy.ft 'c. EJ description No e.ffe.ct..(..r.t~.ffu ~.l.kd).. justification ~ c.hq.~<f<~ ~p.&..i.~.~?~..1~.~.7t..... Uh.-:.c.h v.y.\lq~.1 ~ ~/M.,.'Ia..r.: r/.~...(.ci..(),.0 UCLES 2012 0625/62/0/N/12 [Turn over [2]
12 (f) Suggest why the student measures the time taken for twelve swings of the pendulum rather than for one swing.... HW.:~HHHG.J~«..~V&'~HV. -c~h{th.w.wwwh... G.i~ m~ Q((uYJJI.L ~ 1 r. =c J ~ :TQ.O' SrtvJ.aJ.I -to..~ f!j.r.af. (Jt'U/. [1] ~u~ oscilla.i'\unj e.trt. -tco 9lJ.fCk- [Total: 10 Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders. but if any items requiring clearance have unwittingly been included. the publisher will be pleased to make amends at the earliest possible opportunity. University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES). which is itself a department of the University of Cambridge. UCLES 2012 0625/62/0/N/12