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THE BISHOP'S SCHOOL - CAMP SECOND PRELIMINARY EXAMINATION PHYSICS - 2017 IME I 2 HOURS MARKS : 80 I CLASS : X DATE : 17- lt - 2Ol7 NoTE : Answers to thi'i Daper must be written on the paper provided separately' You will not be allowed to write in the first 15 minutes. This time is to be spent in reading the question paper' The ttme given at th r head of this paper is the time allowed for writin9.thg answers' s ctbn A |5 comp'i'Joryittempt any four questions from Section B The intended marks for q restions or parts /Jf questlons are given in brackets Answer Att SECTION A questions from this section' 9-UESIIeNI 3. What should be the angle between the force and the displacement, (2 x s) in order to get : i) l,laximurrr work ii)lvlinimuffr work State the cnerqy changes in the following: {l) Gevser lil)Solar cell Two sph.rrical objects of mass in the ratio 1 : 2 are dropPed from the same height' (r) Srale the ratio between the. velocrL;es when lhey strlle the groLrnd (ii)The ratio of the forces acting on them during the moion. (i) On what factor does cenlre of gravity of an object depend? (li) Give an example of an object whose centre of gravity lies outside the booy' 100 N force at the iii fne iron gate of a building is 3 m broad. It can be opened by applying gate middle of the gate. Calculate the least force required to open the (ii) Where should the for.-e be applied? f ( b. c. (2xs) qUEEII.SLL a. :itate two facto.s on \ /hich the lateral displacement depenos. b. A ray of light passes l:hrough a right angled prism as shown in the given figure angle of incidence at lhe faces Ac and c. d. e. BC. State the A Complete the following sentences: (i) The pitch c'f sound increases if its frequency (ii)If the amplitude of a sound is doubled, its loudness becomes -.----' The wavelength of waves produced on a surface is 20 cm lf the wave velocity is 24 ms Calculate i (i) The nLrmber of waves produced in one second (ii)The time required to produce one wave. Name the prism requirecl to obtain the spectrum ol : (i) Ultrir violet light (ii)Inf' a fed light ' (2 x 5) u. Wnaiis tn" quantity of heat produced in a coil of resistance 80 Q if current of 3Aispassed thr ough it for 4 seconds. b. A cell is used to send current to an external circuit (r) How does the voltage across its terminal compare with its e m f? terminal voltage? iii;Unoer wfrat conditidns Is the e m f of a cell equal to its B for the following combination points and A the c. djlculate the equivalent r-esistance between + 'lr' of resislors. ouEsrrgl-l t5 A d. e. Define the term speciflc heat capaclty ano state its s.I. unit. a liquid from 25 !C to An ele..rlric heater of power 1000 W rarses the temperature of 5 Kg of 31oC rn 2 mtnutes Calculate : (i) Th,: heat capacrty (ii)Tl',e specific heat capacity of the liquid rrl L)
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