PHYSICS OBJECTIVE QUESTIONS
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Wha What is th the SI SI un unit of of so sound und in intensity? A. joule/m2 C. kg/m2 2 B. N/m D. W/m2 2. What is the the amou amount nt of of heat heat need needed ed to to aise aise the tem!e tem!eatu atue e of of a unit unit mass mass of a su"st su"stan# an#e e "y one deg degee ee #all #alled? ed? A. s!e#ifi# heat C. latent heat B. heat of $a!oi%ation D. heat of fusion &. When When lig light ht ta$ ta$el els s fo fom m 'at 'ate e to ai ai( 'hat 'hat ha!! ha!!ens ens 'ith 'ith its its s!ee s!eed? d? A. emains un#hanged C. in#eases then de#eases de#eases B. in#eases D. de#eases ). *ate *atei ial al tha thatt does does not not ta tans nsmi mitt lig light ht tha thatt st stik ike e a su sufa#e fa#e is is A. o!a+ue C. tans!aent B. tanslu#ent D. semi,o!a+ue -. he emissi emission on of of ele# ele#to tons ns fom fom a meta metall suf sufa#e a#e due to an in#id in#ident ent adia adiatio tion n of suffi suffi#ie #ient nt 'a$elength is #alled A. "la#k"ody adiation C. !hotoele#ti# effe#t effe#t B. lase !odu#tion D. Com!ton s#atteing . In 'hi 'hi#h #h mediu edium m 'ou 'oulld sou soun nd t ta$el a$el slo' slo'es estt? A. metal C. gas B. solid D. li+uid 0. S!e#if S!e#ifi# i# heat heat of A is t'i#e t'i#e of B and and thi thi#e #e of of C "ut only only half half of D. hey hey all all ha$e ha$e the the same same mass mass.. Whi#h Whi#h su"sta su"stan#e n#e a"so"s moe heat to aise the tem!eatue "y one Celsius degee? A. su"stan#e A C. su"stan#e C B. su"stan#e B D. su"stan#e D . What What esu esult lts s fom fom a mult multi! i!le le efl efle# e#ti tion on of soun sound? d? A. noise C. fo#ed $i"ation B. e$e"eation D. miage . What is the the !o# !o#ess ess in 'hi#h 'hi#h a li+uid li+uid #hange #hanges s to to gaseo gaseous us stat state e at the li+ui li+uid3s d3s "oilin "oiling g tem!e tem!eat atue ue? ? A. su"limation C. fusion B. $a!oi%ation D. melting 14. 14. he image mage fo fomed "y a !la !lane ne mi mio o is A. ee#t and e$esed C. in$eted and e$esed e$esed B. ee#t and diffused D. in$eted and diffused 11. 11. What is the amount amount of heat heat e+ui e+uied ed to #on$e #on$ett #om! #om!let letely ely a unit unit mass mass of a solid solid to a li+u li+uid id !hase !hase at the solid3 solid3s s melting !oint? A. latent heat of fusion fusion C. latent heat of $a!oi%ation $a!oi%ation B. s!e#ifi# heat D. latent heat of solidifi#ation 12. 12. 5eat 5eat ta ta$e $els ls th thou ough gh li+ li+ui uids ds and and gas gases es th thou ough gh A. adiation C. #ondu#tion B. #on$e#tion D. a"so!tion 1&. What is the the !o#es !o#ess s of #hangi #hanging ng soli solid d to gas 'itho 'ithout ut !ass !assing ing thoug though h the the li+ui li+uid d state state? ? A. #ondensation C. fusion B. e$a!oation D. su"limation 1). 1). What What is is the the !o !o#e #ess ss of #han #hangi ging ng a $a! $a!o o to the the li+ li+ui uid d sta state te ? A. fusion C. su"limation B. #ondensation D. $a!oi%ation 1-. 1-. he he la' la' of of ef efle le#t #tio ion n stat states es that that the the angl angle e of efl efle# e#ti tion on is is A. s#atteed u!on stiking stiking a sufa#e B. e+ual to to th the an angle of of e efle#tion C. e+ual to th the angle of of in#iden#e D. efl efle#t e#ted in th the o! o!!osite di die#t e#tion. 1. hin hin films films of oily oily and and soa!y soa!y 'ate 'ate o'e thei thei "ill "illian iantt #olos #olos to to a #om"in #om"inati ation on of efl efle#t e#tion ion and and A. intefeen#e C. !olai%ation B. efa#tion D. diffa#tion 10. he heat heat fom fom "unin "uning g !ie#e !ie#es s of 'ood 'ood ea#h ea#hes es you you "y "y 'hat 'hat me#han me#hanism ism of heat heat tans tansfe fe? ? A. #ondu#tion C. #on$e#tion B. adiation D. e$a!oation 1. It o##us 'hen the fe+uen#y of fo#ed $i"ation on an o"je#t mat#hes the o"je#t3s natual fe+uen#y. A. modulation C. e$e"eation B. esonan#e D. A#ousti#s 1. 1.
24. 24.
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An a!! a!!oa# oa#hi hing ng sie sien n is is hea head d hig highe he in in !it !it#h #h due due to to A. sound intefeen#e C. intensity effe#t effe#t B. stonge $i"ation D. Do!!le effe#t Soun Sound d tha thatt is hea head d loud loude e has has a ge geat ate e A. tone C. !it#h B. fe+uen#y D. am!litude he su!e! su!e!osi ositi tion on of of t'o t'o "eams "eams of of light light esult esultin ing g in a loss loss of of eneg enegy y in one aea aea and a einfo#ement of enegy in othes is #alled A. intefeen#e C. diffa#tion diffa#tion
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B. !olai%ation D. dis!esion 22. What is an ele#tomagneti# adiation of $ey shot 'a$elength emitted fom the nu#leus of a adioa#ti$e atom? A. ulta$iolet B. 6,ay C. infaed D. gamma ay 2&. he a$eage kineti# enegy of the mole#ules of a "ody is a measue of the "ody3s A. $olume C. tem!eatue B. heat D. mass 2). Why ae shado's fomed? A. 7ight is s#atteed "y a smooth sufa#e. B. 7ight ta$els in a staight line. C. 7ight is dis!esed in all die#tions. D. 7ight !odu#es a dak aea. 2-. he #li#king of stones unde 'ate 'as head loude "y di$es unde 'ate than "y sailos a"o$e 'ate. Why? A. Sound ta$els ) times faste in ai than in 'ate. B. Sound #annot ta$el fast fom 'ate to ai. C. Sound ta$els ) times faste in li+uid than in ai. D. Sound #an ta$el faste in ai than in 'ate. 2. he unit of enegy #ommonly used in atomi# and nu#lea !hysi#s is the A. 8oule B. kilo8oule B.. kilo'att,h D. ele#ton $olt 20. he la's of !hysi#s ae the same in all inetial fames. his is a##oding to 'hat !in#i!le? A. 5uygen3s !in#i!le B. !in#i!le of elati$ity C. Su!e!osition !in#i!le D. 9in#i!le of Constan#y 2. 7AS:; is the a#onym fo A. 7ight am!lifi#ation of sound emission of adiation B. 7ight am!lifi#ation of stimulated emission of adiation C. 7ight am!lifi#ation "y sound emission of adiation D. 7ight am!lifi#ation "y stimulated emission of adiation 2. Whi#h of the follo'ing is de!endent u!on the fe+uen#y of sound $i"ations? A. tim"e B. loudness C. intensity D. !it#h &4. Why #an $ey smooth sufa#es fom #lea images? A. hey esult in iegula efle#tion. B. he efle#ted ay is #lea. C. hey #eate egula efle#tion. D. 7ight is efle#ted in one die#tion only. &1. When $a!o #ondenses to a li+uid ( 'hat ha!!ens? A. it a"so"s heat C. it eleases heat B. its tem!eatue do!s D. its tem!eatue ises. &2. 'o !ots of the same si%e( maked A and B( 'ee filled 'ith "oiling 'ate. A is 'hite 'hile B is "la#k. Whi#h 'ate 'ill #ool faste? A. A < B emain "oiling C. in !ot B B. in !ot A D. !ots A < B 'ill #ool off at the same time &&. ;ags and #utain ae used in theates in ode to A. am!lify sound C. a"so" light B. im!o$ed lighting D. a"so" sound &). he atio of the s!eed of light in the fist medium to the s!eed in the se#ond medium is #alled == A. a"solute inde> of efa#tion C. elati$e inde> of efa#tion B. efa#tion D. shallo'ing effe#t &-. Whi#h is the !o!ety of light 'a$es that leads to the !henomenon of #olo? A. am!litude C. s!eed B. $elo#ity D. 'a$elength &. Whi#h of the follo'ing states that light ta$els in tiny "usts of enegy? A. +uantum theoy C. !hotoele#ti# effe#t B. 'a$e theoy D. #o!us#ula theoy &0. Colos de!end on the fe+uen#y of light 'e see. he highest fe+uen#y 'e dete#t a!!eas A. "lue C. oange B. $iolet D. ed &. Bats #an !odu#e ultasoni# sound. Des#i"e this kind of sound. A. fe+uen#y a"o$e 24(444 5% C. fe+uen#y of 14(444 5% B. fe+uen#y "elo' 24(444 5% D. fe+uen#y "elo' 1-(444 5% &.
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Whi#h of the follo'ing e>!ands most 'hen tem!eatue A. helium at )o C C. B. 'ood D. What kind of image is !odu#ed "y #on$e> mios? A. in$eted and magnified C. B. in$eted and smalle D. As the angle of in#iden#e in#eases( 'hat ha!!ens 'ith A. e>!ands C.
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B. in#eases D. de#eases 7enses fom images a##oding to the !in#i!le of A. efle#tion C. efa#tion B. !olai%ation D. su!e!osition he se!aation of 'hite light into #olos of a s!e#tum 'hi#h ae aanged to fe+uen#y is #alled A. efa#tion C. s#atteing B. efle#tion D. dis!esion he enegy of !hoton is die#tly !o!otional to its A. al!ha ay C. !eiod B. 'a$elength D. fe+uen#y Whi#h of the follo'ing has the highest fe+uen#y? A. >,ay C. mi#o'a$e B. ulta$iolet D. adio 'a$e A !o#ess in 'hi#h enegy of a !hoton is #on$eted into mass. A. !ai annihilation C. 9ai !odu#tion B. !hotoele#ti# effe#t D. nu#lea ea#tions What detemine the #olo of an o!a+ue mateial? A. the #olo it efle#ts C. #olo it defa#ts B. #olo it s!eads D. angle of the #olo What efes to the sensation in the ea 'hi#h de!ends on the enegy in the sound 'a$e? A. !it#h C. intensity B. loudness D. tim"e Whi#h 'ould #oe#tly des#i"es sound 'a$es? A. longitudinal C. tans$ese B. diagonal D. adial he sum of the kineti# enegy and the est enegy. A. me#hani#al enegy C. themal enegy B. elati$isti# enegy D. "inding enegy At 'hat angle of efa#tion is light in#ident at the #iti#al angle? A. &4o C. )-o B. 4o D. 4o What is the $elo#ity of sound in ai? A. 1(&41 m/s B. 1&& m/s C. 1(&44 m/s D. &&1 m/s We o"tain a temendous amount of enegy 'hen the nu#leus s!lits into lighte nu#lei in a !o#ess #alled A. ea#tion B. integation C. fusion D. fission he amount of light that a sou#e gi$e out measued in #andela. A. luminous flu> C. luminous intensity B. illumination D. luminous effi#ien#y 7ight #onsists of !a#kets of enegy #alled !hotons o +uanta. his is a##oding to 'hat theoy of light? A. #o!us#ula theoy C. 'a$e theoy B. ele#tomagneti# theoy D. +uantum theoy he #olo that is efa#ted most 'hen sunlight is se!aated "y the !ism is A. indigo B. $iolet C. yello' D. "lue he degee of highness o lo'ness of the sound as !e#ei$ed "y the listenes. A. +uality of sound C. loudness B. !it#h D. intensity Who !edi#ted the e>isten#e of ele#tomagneti# 'a$es? A. Ne'ton C. *a>'ell B. :instein D. Do!!le 7ightning is seen "efoe thunde is head. Why? A. Sound ta$els faste than light. B. 7ight is "lo#ked "y ai. C. 7ight ta$els faste that sound. D. Sound is "lo#ked "y ai. A 'histle "lo'n 'ith mu#h effot 'ill sound loude "e#ause intensity de!ends on the A. enegy of the sound 'a$es C. ta$el of sound 'a$es B. length of the $i"ation D. duation of sound An ele#tomagneti# 'a$e that ha$e the shotest 'a$elength "ut highest fe+uen#y. A. mi#o'a$e C. infaed 'a$e B. gamma ay D. adio 'a$e he #olo of light 'hi#h has the longest 'a$elength and lo'est fe+uen#y. A. indigo C. $iolet B. ed D. geen Whi#h of the follo'ing has the geatest enegy? A. -44 nm !hoton C. 0-4 nm !hoton B. -4 nm !hoton D. 044 nm !hoton A nu#lea ea#to uses a adioa#ti$e su"stan#e to !odu#e a temendous amount of enegy. Name this element. A. tungsten B. !latinum C. uanium D. lithium Page
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A !en#il !atly su"meged o"li+uely in 'ate a!!eas to "e "ent at a !oint 'hee it entes the 'ate sufa#e. his o"se$ation #an "e e>!lained "y the !in#i!le A. efle#tion B. diffa#tion C. dis!esion D. efa#tion . A 'a$e on a sting that #auses the sting to s'ee! out a !atten. A. longitudinal 'a$e C. tans$ese 'a$e B. standing 'a$e D. ele#tomagneti# 'a$e 0. he sky a!!eas "lue "e#ause the dust !ati#les in the atmos!hee A. efle#t the 'hole s!e#tum C. a"so" the "lue !otion s!e#tum B. a"so" the 'hole s!e#tum D. efle#t the "lue !otion of the s!e#tum . What kind of de$i#es is used in unde'ate su$eying( de!th dete#tion and na$igation? A. sona B. lase C. sola D. tidal . It o##us 'hen t'o 'a$es 'ith the same fe+uen#y and am!litude ta$eling in the same die#tion ae in !hase. A. #onstu#ti$e intefeen#e C. destu#ti$e intefeen#e B. dis!la#ement node D. dis!la#ement antinode 04. he natual fe+uen#y of the $i"ating sting 'hi#h is also #alled the thid o$etone. A. fist hamoni# C. se#ond hamoni# B. thid hamoni# D. fouth hamoni# 01. he effe#t that 'e #all a miage has something to do 'ith A. efa#tion C. diffa#tion B. s#atteing D. intefeen#e 02. he !o!ety of tans!aent mateial 'hi#h measue the s!eed of light though the medium. A. linea density C. o!ti#al density B. inde> of efa#tion D. diffa#tion 0&. What is the unit of luminous untensity? A. foot,#andle B. lumen C. Candela D. lu> 0). What is the unit of luminous effi#ien#y? A. lumen/'att B. lumen/$olt C. lumen/am!ee D. lumen/#oulom" 0-. 5o' is sound intensity measued? A. in "eats B. in de#i"els C. in 'e"e D. in tesla 0. he ma>imum dis!la#ement of an o"je#t undegoing hamoni# motion on eithe side of its e+uili"ium !osition is #alled the ====== of the motion. A. fe+uen#y B. os#illation C. !eiod D. am!litude 00. What +uantity is often used in des#i"ing hamoni# motion? A. fe+uen#y B. os#illation C. !eiod D. am!litude 0. What ty!e of mio that #u$es in'ad its #ente and #on$eges !aallel light to a single eal fo#al !oint? A. #on$e> mio C. #on#a$e mio B. s!hei#al mio D. #homati# mio 0. What efes to the #hange in fe+uen#y of a 'a$e 'hen thee is elati$e motion "et'een its sou#e and an o"se$e? A. Su!e!osition !in#i!le B. Sho#k effe#t C. Do!!le effe#t D. 'a$e motion 4. What o##u 'hen the indi$idual !ati#les of a medium $i"ate "a#k and foth in the die#tion in 'hi#h the 'a$es ta$el? A. longitudinal 'a$es B. tans$ese 'a$es C. 'a$e motion D. sho#k 'a$es 1. What o##us 'hen the esulting #om!osite 'a$e has an am!litude geate than that of eithe of the oiginal 'a$es? A. lo#al intefeen#e B odinay intefeen#e C. #onstu#ti$e intefeen#e C. destu#ti$e intefeen#e 2. he ate at 'hi#h a 'a$e of any kind #aies enegy !e unit #oss,se#tional aea is #alled === A. "eats B. fe+uen#y C. gain D. intensity &. What efes to the "ightness of a light sou#e? A. luminous intensity B. illumination C. luminous flu> D. lumen ). If the linea magnifi#ation of an o!ti#al system is less than one( it means that A. the image and the o"je#t ae of the same si%e B. the image is lage than o"je#t C. the image is smalle than the o"je#t D. the image may "e lage o smalle than o"je#t. -. What efes to the atio "et'een the s!eed of light in fee s!a#e and its s!eed in a !ati#ula medium? A. inde> of efle#tion B. total intenal efle#tion C. inde> of dis!esion D. inde> of efa#tion . he atio of the sines of the angles of in#iden#e and efa#tion is e+ual to the atio of the s!eeds of light in the t'o media. his statement is A. 5uygen3s !in#i!le B. Snell3s la' C. *a>'ell3s hy!othesis D. Do!!le effe#t 0. 7ight ay that !asses at an angle fom one medium to anothe is defle#ted at the sufa#e "et'een the t'o media. What is this !henomenon #alled? A. dis!esion B. efle#tion C. efa#tion D. in#iden#e LAL
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What efes to the effe#t 'hen a "eam #ontaining moe than one fe+uen#y is s!lit into a #oes!onding num"e of diffeent "eams 'hen it is efa#ted? A. flu> B. efa#tion C. efle#tion D. dis!esion . What efes to the "and of #olos that emeges fom the !ism? A. s!e#tum B. luminan#e C. fa#et D. efle#tion 4. What ty!e of lens de$iates !aallel light out'ad as though it oiginated at a single $itual fo#al !oint? A. magnifying lens B. #on$egent lens C. di$egent lens D. mi#os#o!i# lens 1. A #amea usually uses 'hat ty!e of lens to fom an image on a light,sensiti$e !hotoga!hi# film? A. magnifying lens B. #on$egent lens C. di$egent lens D. mi#os#o!i# lens 2. Whi#h of the follo'ing statements is ;:? A. A high,fe+uen#y sound has high !it#h. B. A high,fe+uen#y sound has lo' !it#h. C. A high,fe+uen#y sound has lo' enegy. D. A high,fe+uen#y sound has lo' !it#h and lo' enegy. &. What efes to a seies of !aallel slits that !odu#es a s!e#tum though the intefeen#e of light that is diffa#ted? A. diffa#tion gating B. !olai%ation C. #oheent 'a$es D. efle#tion ). he emission of ele#tons fom a metal sufa#e 'hen light shines on it is #alled====. A. a"so!tion effe#t B. s!e#tum emission C. +uantum effe#t D. !hotoele#ti# effe#t -. What de$i#e is used fo !odu#ing a nao'( mono#homati#( #oheent "eam of light? A. s!e#tal de$i#e B. !ism C. fi"e o!ti# D. lase . What #olo has the shotest 'a$elength? A. indigo B. $iolet C. "lue D. geen 0. An o!ti#al effe#t sometimes seen at sea( in the deset o e$en o$e a hot !a$ement that may ha$e the a!!eaan#e of a !ool of 'ate. A. miage B. dis!esion C. diffa#tion D. total intenal efle#tion . In this !o#ess( the enegy of a !hoton is #on$eted into !ositon and an ele#ton. A. !ai !odu#tion C. !ai annihilation B. nu#lea ea#tion D. lase !odu#tion . @ailue of !aallel ays to meet at a single !oint on a s!hei#al sufa#e afte efle#tion o efa#tion. A. S!hei#al A"eation C. Chomati# a"eation B. S!hei#al dis!esion D. Chomati# dis!esion 144. A !o#ess of affe#ting adiation and es!e#ially light so that the $i"ation of the 'a$es assume a definite fom A. !olai%ation B. diffa#tion C. dis!esion D. efa#tion 141. he enegy e+uied to "eak a nu#leus a!at into its #onstituent !ati#les is #alled A. ioni%ation enegy C. "inding enegy B. disintegation enegy D. est enegy 142. When !otons and neutons join to fom helium nu#leus( the mass is de#eased in the !o#ess. his diffeen#e is #alled A. adioa#ti$ity C. #a"on dating B. mass defe#t D. tansmutation 14&. 9ati#les in the nu#leus ae #alled A. nu#lides C. neutons B. nu#leons D. neutino 14). In this ty!e of de#ay !o#ess( the daughte nu#leus has the same num"e of nu#leons as the !aent nu#leus( "ut the atomi# num"e is #hanged "y 1. A. al!ha de#ay C. "eta de#ay B. gamma de#ay D. half,life 14-. A ty!e of adioa#ti$e de#ay #haa#tei%ed "y the emission of enegeti# !ositi$ely #haged !ati#les. A. al!ha de#ay C. "eta de#ay B. gamma de#ay D. half,life
PHYSICS PROBLEMS 14. A hoi%ontal #od - m long has a mass of 2.- g. What must "e the tension in the #od if the 'a$elength of a 124 5% 'a$e on it is to "e -4 #m? A. 1.- N B. 1. N C. 1.0 N D. 1. N 140. A &,m sting is di$en "y a 2)4 5% $i"ato at its end. Detemine the s!eed of tans$ese 'a$es on the sting if it esonates fou segments? A. &)4 m/s B. &-4 m/s C. &4 m/s D. &04 m/s LAL
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14. A guita sting &4 #m long esonates in its fundamental to a fe+uen#y of 2-4 5%. What is the tension in the sting if 4 #m of the sting 'eighs 4. gam? A. 12.- N B. 22.- N C. &2.- N D. )2.- N ,0 14. What is the elati$e intensity le$el of sound in de#i"els if its intensity is & > 14 W/#m2? A. ). dB B. 0.0 dB C. 4.- dB D. 0-.) dB 114. A tain "lo'ing its 'histle at 0-4 5% a!!oa#hes a station at the ate of &- miles/h. What fe+uen#y is head "y a man standing at the station #onsideing the $elo#ity of sound in ai 1144 ft/s? A. 0&.0 5% B. -0.) 5% C. 01.) 5% D. 0.0 5% 111. 'o #as A and B ae ta$eling to'ad ea#h othe at s!eeds of )- km/h and 04 km/h( es!e#ti$ely. If A is "lo'ing its hon( 'hat is the elati$e !it#h head "y a !assenge in B( #onsideing that the $elo#ity of sound is &)) m/s? A. 1.4)& B. 1.421 C. 1.4 D. 1.40 112. An e>!losion o##us at a distan#e of - km fom the o"se$e. 5o' long afte e>!losion does a !eson hea if the tem!eatue is 1 oC? A. 12.&) se# B. 1).- se# C. 11.&- se# D. 1.0 se# 11&. What is the s!eed of sound in Neon gas at tem!eatue of 2- oC( #onsideing that the mole#ula mass of this gas is 24.1 kg/mole? @o Neon k 1.0 A. 1).&2 m/s B. 1-.- m/s C. 1.0 m/s D. 10.21 m/s 1) 11). What is the 'a$elength of yello' light 'hose fe+uen#y is - > 14 5%? A. 44 nm B. 044 nm C. 44 nm D. -44 nm 11-. What is the angle of efa#tion of light as a "eam of !aallel light entes a "lo#k of i#e at an angle of in#iden#e of &4o? he inde> of efa#tion of i#e is 1.&1 and that of ai is 1.4 A. ))o B. &&o C. 22o D. 11o 11. It 'as found out that the s!eed of light in 'ate is 0-E of its s!eed in $a#uum. What is the inde> of efa#tion of 'ate? A. 1.22 B. 1.&& C. 1.)) D. 1.-110. A light !asses fom glass to 'ate. If the inde> of efa#tion fo glass is 1.-) and fo 'ate is 1.&&( #om!ute the #iti#al angle fo this light to !ass the glass. A. -.0o B. -.0o C. 0.)o D. -&.o 11. A light "ul" is used to light a "unke 14 ft "elo'. A #hai sits on the floo of the "unke & feet fom a s!ot die#tly "elo' the "ul". What is the illumination on the floo aound the #hai if the luminous intensity is 1-4 #andles? A. 2.& ft,#andles B. 1. ft,#andles C. 1.&2 ft,#andles D. 2. ft,#andles 11. A lens has a #on$e> sufa#e of adius 10 #m and a #on#a$e sufa#e of adius & #m and is made of glass of efa#ti$e inde> 1.-- . Cal#ulate the fo#al length of the lens and #lassify the ty!e of lens 'hethe di$eging o #on$eging. A. --.& #m #on$eging lens C. --.& #m di$eging lens B. -0.)- #m #on$eging lens D. -0.)- #m di$eging lens 124. A dou"le #on$e> lens has fa#es of adii 22 #m and 2) #m. When an o"je#t is &4 #m fom the lens( a eal image is fomed )- #m fom the lens. What is the efa#ti$e inde> of the lens mateial? A. 1.0 B. 1.21 C. 1.&2 D. 1.) 121. A -4,W in#andes#ent lam! has a mean s!hei#al luminous intensity of 0 #d. Com!ute the total luminous flu> adiated "y the lam!? A. 0 lm B. 0 lm C. )-0 lm D. )2 lm 122.
A 2-4,W light sou#e has a mean s!hei#al luminous intensity of 0.- #d. Com!ute the luminous effi#ien#y of the lam!? A. 2.) lm/W B. &.) lm/W C. ).) lm/W D. -.) lm/W 12&. :stimate the distan#e fo 'hi#h a &4,#d lam! !o$ide the same illumination as a standad lam! of 4,#d !la#ed 10 ft fom the s#een? A. .0 ft B. 14.) ft C. .- ft D. 12.0 ft 12). An o"se$e sees a s!a#eshi!( measued 144 m long 'hen at est. 5e !assed "y in unifom motion 'ith a s!eed of 4.-#. While the o"se$e is 'at#hing the s!a#eshi!( a time of 2 se# ela!ses on a #lo#k on "oad the shi!( 'hat is the length of the mo$ing shi!? A. 2.& m B. -. m C. . m D. &. m ,1& 12-. What is the est enegy of ele#ton e+ui$alent to its est mass? 1 *eF 1. > 14 8 and mass of ele#ton is .11 > 14,&1 kg. A. 4.-12 *eF B. 4.0 *eF C. 4.&)- *eF D. 4.0- *eF 12. What is the fe+uen#y of !hoton ha$ing enegy of 2 eF? A. )2. 5% B. -&4.2 5% C. 20. 5% D. &-.1 5% 120. What is the "ulk modulus of steel if the sound 'a$es ta$eled at a!!o>imately - 44 m/s? he density of steel is 044 kg/m&. A. 0.2- > 1411 9a B. 2.0- > 1411 9a C. -.20 > 1411 9a D. 2.-0 > 1411 9a 12. What kind of s!hei#al mio must "e used ( and 'hat must "e the adius( in ode to gi$e an ee#t image 1/- as lage as an o"je#t !la#ed 1- #m in font of it? A. 0.- #m G #on$e> mioH C. , 0.- #m G#on$e> mioH B. 0.- #m G #on#a$e mioH D. , 0.- #m G#on#a$e mioH 12. Whee should an o"je#t "e !la#ed 'ith efeen#e to a #on#a$e s!hei#al mio of adius 14 #m in ode to fom a eal image ha$ing a magnifi#ation of . A. 244 #m fom mio C. 224 #m fom mio C. 2-4 #m fom mio D. 204 #m fom mio LAL
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Des#i"e the image of an o"je#t !ositioned 24 #m fom a #on#a$e s!hei#al mio of adius 4 A. $itual( in$eted( 4 #m "ehind mio( "igge than o"je#t B. $itual ( ee#t( 4 #m "ehind mio( smalle C. $itual( ee#t( 4 #m "ehind mio( "igge than o"je#t D. eal ( in$eted( 4 #m in font of mio( "igge than o"je#t
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