8/12/2019 ICSE Class 10th Physics Sample Paper 4

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Physics Question Paper2005

Question 1(a) Which physical quantity does the electron volt measure? How is itrelated to the S.I. unit of this quantity? !"(#) What should the an$le #etween force and displacement #e to $et the

i. %inimum wor& ii. %a'imum wor& (c) State ewton s second law of motion. !"(d) *he wor& done #y the heart is 1 +oule per #eat. ,alculate the power of the heart if it #eats -! times in one minute. !"(e) %ention two properties of a wave one property which varies and theother which remains constant when the wave passes from one medium toanother. !"Question !(a) /'plain #riefly what causes the twin&lin$ of stars at ni$ht. !"(#) State two advanta$es of an aneroid #arometer. !"(c) /'plain why a $as #u##le released at the #ottom of a la&e $rows in si0eas it rises to the surface of the la&e. !"(d) What is meant #y the statement the critical an$le of diamond is !23 ?How is the critical an$le of a material related to its refractive inde'? !"(e) 4 #loc& of wood of volume !5cm6 floats in water with !3cm6 of itsvolume immersed. ,alculate

i. the density andii. the wei$ht of the #loc& of wood.Question 6(a) ame any two electroma$netic waves which have a frequency hi$her than that of violet li$ht. State one use of each. !"(#) State two ways #y which the frequency of transverse vi#rations of astretched strin$ can #e decreased. !"(c) Why does the temperature of the surroundin$s start fallin$ when the iceof a fro0en la&e starts meltin$? !"(d) 7our resistances of !.3 each are 8oined end to end to form a square49,:. ,alculate the equivalent resistance of the com#ination #etween anytwo ad8acent corners. !"(e) In a three;pin plu$ why is the earth pin made lon$er and thic&er than theother two pins? !"Question 2(a) State the ener$y chan$e which ta&es place when a ma$net is movedinside a coil havin$ a $alvanometer at its ends. ame this phenomenon. !"(#) :raw a la#elled dia$ram of an 4.,. $enerator. !"(c) ,alculate the heat ener$y that will #e released when 5.3 &$ of steam atl333 , condenses to form water at 1333,. /'press your answer in S.I. unit.(Specific latent heat of vapori0ation of steam is !!+ >$.) !"(d) How many alpha and #eta particles are emitted when @ranium nucleus!6=A! @ decays to Bead !3