Republic of the Philippines Department of Education Region IV-A CALABARZ! CITY SCHOOLS DIVISION OF BACOOR
Bacoor Cit"# Ca$ite
SCIENCE 10 SECOND QUARTERLY EXAMINATION
!ame% &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& &&&&&&&&&&&&&&&&&&&&&&&&&&&&&& && Le$el ( 'ection% &&&&&&&&&&&&&&&&&&&&&&&
'core% &&&&&&&&&&&&&&&&&&&&&&& Date% &&&&&&&&&&&&&&&&&&&&&&&&
Instructions Choose the letter of the best ans)er* Begin +ere
,* hat do "ou call the de$ice that detect and con$ert audio inputs to electric outputs. A* studio monitor C* cable B* audio interface D* transducer /* hat is the nature of the force responsible in the operation of a DC motor. A* electrical C* gra$itational B* magnetic D* electrical and magnetic 0* Electromagnetic induction describes the &&&&&&&&&&&&&&&&&&&&&&* A* effect of heat on a magnetic field B* effect of heat on a mo$ing conductor C* effect of a conductor mo$ing in a magnetic field D* effect of magnetic field on a stationar" conductor 1* hich of the follo)ing is true about a magnet that is bro2en into t)o pieces. A* Both pieces are as magnetic as the original magnet* B* Both magnets are stronger than the original magnet* C* Both magnets )ill ha$e a north pole and a south pole* D* ne of the pieces is a north pole and the other is a south pole* 3* Permanent magnets are magnets &&&&&&&&&&&&&&&&&&&&&&&& A* that can be regulated C* )hose magnetism had been induced B* natural stones dug from the Earth D* made from allo"s of cobalt and nic2el 4* hich of the follo)ing is nonmagnetic material. A* cobalt B* glass C* nic2el D* steel 5* All magnets can ha$e &&&&&&&&&&&&&&&&&&&&&&* A* t)o !-see2ing poles C* an E-see2ing pole or -see2ing poles B* t)o '-see2ing poles D* onl" a !-see2ing and a '-see2ing pole 6* In a bar magnet# &&&&&&&&&&&&&&&&&&&&&&* A* onl" the t)o poles are magneti7ed C* onl" the !-see2ing pole is magneti7ed B* the )hole bar magnet is magneti7ed D* onl" the '-see2ing pole is magneti7ed 8* 9he force of repulsion or attraction bet)een t)o poles depends mainl" on &&&&&&&&&&&&&&* A* strength of the poles C* permanence of the magnet B* 2ind of metal is the magnet D* the distance bet)een the poles ,:* 9he !-pole and the '-pole &&&&&&&&&&&&&&&&&&&&* A* attract each other B* push against each other C* are neutral )ith each other D* ha$e something to do )ith the nature of a magnet ,,* hat )ill happen to a permanent magnet if it is dropped too often. A* ;agnet )ill lose its magnetism* C* ;agnetic domain )ill be disturbed* B* ;agnet )ill be magneti7ed* D* ;agnetic domain )ill not be disturbed* ,/* hich is 9R
,0* 9he magnetic field is &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&* A* the place )here no ob=ect ma" be influenced b" a magnet B* the region in space mar2ed b" $isible magnetic lines of force C* that space near a magnet )here onl" another magnet ma" be affected D* the area )here a magnet can influence other magnets or other magneti7able metals ,1* 9he abilit" of a substance to attract the magnetic flu> from other materials is described as its &&&&&&&&&&&&* A* accountabilit" C* permeabilit" B* penetrabilit" D* transparenc" ,3* 9he number of the magnetic lines of force is called &&&&&&&&&&&&&&&&&&&&&&* A* the magnetic flu> C* magnetic lines of force B* its magnetic strength D* the magnetic force ,4* hich of the follo)ing statements is false. A* A )ire carr"ing an electric current can affect a compass* B* A )ire coil carr"ing an electric current is an electromagnet* C* A )ire coil carr"ing an electric current is a permanent magnet* D* A )ire coil carr"ing an electric current can produce a magnetic field* ,5* 9he direction of the magnetic field at a gi$en point is the direction the &&&&&&&&&&&&&&&&* A* left side of the needle )hen placed at that point B* right side of the needle )hen placed at that point C* ! pole of a compass needle )hen placed at that point D* ' pole of a compass needle )hen placed at that point ,6* Lines of flu> from a magnet &&&&&&&&&&&&&&&&&&&&&&* A* start from ! pole and flo) to)ard the ' pole B* start from the ' pole and flo) in all directions C* start from the ' pole and flo) to)ard the ! pole D* start from the ! pole and flo) in all directions )ithin the magnetic field ,8* ho disco$ered that a changing magnetic field generates electricit". A* +ans Christian ersted B* ;ichael ?arada" C* @eorge 'imon hm D* +einrich +ert7 /:* hich )ill !9 affect the amount of induced current )hen a magnetic field and a conductor are in relati$e motion. * their relati$e $elocit" B* the strength of the magnetic field C* the length of the conductor D* the direction of the magnetic field /,* 9he magnetic field in a magnet is produced b" &&&&&&&&&&&&&&&&&&&&&&* A* the mo$ing electrons in a magnet B* the transfer of protons from one end to the other end of a magnet C* the neutrons mo$ing out of the nuclei of the atoms in the magnet D* some other forces in the magnet aide from the electrons# protons# and nuclei* //* In order for electrons to mo$e through a conductor# &&&&&&&&&&&&&&&&&&&&&&* A* an emf must be applied B* heat must be applied on the conductor C* the conductor must be cooled belo) some room temperature D* there is no need to do an"thing# the electrons )ill mo$e b" themsel$es /0* hat is produced b" the rapid changes of the electric field. A* current C* magnetic field B* electromagnets D* $oltage /1* hat la) tells us that the direction of the cu rrent opposes )hate$er action responsible for its production. * ?arada"s La) C* Amperes La) Len7s La) D* La) of Conser$ation of Energ" /3* hich of the follo)ing is increased or decreased in a transformer. A* current C* magnetic field B* energ" D* $oltage /4* hat does a changing magnetic field in a coil of )ire produce. A* An induced po)er B* An induced $oltage C* An induced resistance D* An induced coil polarit" /5* A bar magnet is passed through a coil of )ire* In )hich case )ould the induced current in the coil of )ire greatest. A* hen the magnet mo$es slo)l" so that it is inside the coil for a long time* B* hen the magnet mo$es fast so that it is inside the coil for a short time*
C* hen the north pole of the magnet enters the coil first* D* hen the south pole of the magnet enters the coil first* /6* hich of the follo)ing methods )ill result to an induced current in a loop of )ire. I* ;o$ing a magnet into the loop of )ire II* ;o$ing the loop of )ire into a magnet III* Placing the loop near a )ire )here an alternate current is flo)ing A* I and II C* I and III B* II and III D* I# II and III /8* hich statement is !9 9R that produced it* D* An induced $oltage gi$es rise to a current )hose magne tic field is in the same direction as the change in magnetic flu> that produced it* 0:* hen does electromagnetic induction occur in a coil of )ire. A* hen there is a change in electric field* B* hen there is a change in magnetic field* C* hen there is a change in the $oltage of the coil* D* hen there is a change in the polarit" of the coil* 0,* In )hich of the follo)ing cases is $oltage induced in a )ire. I* ;o$ing the )ire near a magnet II* ;o$ing a magnet near a )ire III* Changing the current in the nearb " )ire A* I onl" C* I and II B* II onl" D* I# II and III E* 0/* 'e$eral paper clips dangle from the north pole of a magnet* hat is the induced pole in the bottom of the lo)ermost paper clip. ?* A* !orth pole @* B* 'outh pole +* C* !orth or 'outh pole I* D* Cannot be determined * 00* hen is current produced in an electromagnetic induction. * A* conductor mo$es across a magnetic field L* B* the length of the conductor is increased ;* C* the strength of the magnetic field !* D* magnetic field does not mo$e )ith respect to a stationar" conductor field does not change * 01* +e demonstrated the magnetic effect based on the direction of current* P*A* Andr-;arie Ampere R* C* ames Cler2 ;a>)ell * B* ;ichael ?arada" '* D* +einrich +ert7 9* 03* +e contributed in de$eloping eFuations that sho)ed the relationship of electricit" and magnetism* <* A* Andr-;arie Ampere * C* ames Cler2 ;a>)ell V* B* ;ichael ?arada" G* D* +einrich +ert7 H* 04* +e sho)ed e>perimental e$idence of electromagnetic )a$es and their lin2 to light* Z* A* Andr-;arie Ampere AB* C* ames Cler2 ;a>)ell AA* B* ;ichael ?arada" AC* D* +einrich +ert7 AD* 05* +e formulated the principle behind electromagnetic induction* AE* A* Andr-;arie Ampere A@* C* ames Cler2 ;a>)ell A?*B* ;ichael ?arada" A+* D* +einrich +ert7 AI* 06* hich of the follo)ing statements isare 9R
AH*A* Infrared AG* 1:* hich and ting. CC* A* radio )a$es CE* C* ultra$iolet ra"s CD* B* micro)a$es C?*D* G-ra"s C@* 15* hat is the t"pe of electromagnetic )a$e used in chec2ing ban2boo2 signature. C+* A* radio )a$es C* C* ultra$iolet ra"s CI* B* micro)a$es C* D* G-ra"s : CL* 16* A ra" of light falls on a mirror at an angle of /6 )ith the surface* 9he angle at )hich light is reflected is C;* A* /6: C* C* 4/: C!* B* ,1: CP*D* 34: C* 18* A conca$e lens# li2e a con$e> mirror &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&* CR* A* gi$es onl" a reduced image C'* B* does not produce a real image C9* C* produces onl" enlarge images C<* D* produces onl" an in$erted image
CV* 3:* A man is ,*1 m tall* hat is the minimum si7e of plane mirror he needs to see his full self. C* A* ,*1 m CZ* D* 9he si7e depends on his distance CG* B* :*5 m from mirror CH* C* greater than ,*1 m
D<* 33* If "ou loo2 at the pool of still )ater# "our face is clearl" seen* hich of the follo)ing best e>plains this. DV* A* 'cattering of light in different directions D* B* Regular reflection of light b" the surface of still )ater DG* C* Irregular reflection of light b" the surface of still )ater DH* D* Light is reflected from the surface of still )ater in different directions DZ* 34* 9he filament in an automobile headlight radiates light that is reflected from a con$erging mirror* 9he reflected ra"s form a parallel beam of light because the filament is placed &&&&&&&&&&&&&&&&&&&&&&* EA* A* at the principal focus ED* D* bet)een the mirror and the EB* B* at the center of cur$ature principal focus EC* C* be"ond the center of cur$ature EE*35* A ra" of light stri2es a plane mirror at an angle of eFual to 0 ::* hat is the angle of reflection. E?*A* 0:: E+* C* 8:: E@* B* 4:: EI* D* ,/:: E* ?or 36-4:# refer to the information belo)% E* A :*/: m tall ob=ect )as placed :*,3 m in front of a conca$e mirror* 9he image is formed :*0: m also in front of the mirror* EL* E;* 36* 9he focal length of the mirror is &&&&&&&&&&* E!* A* :*,: m EP* C* -:*,: m E* B* :*13 m E* D* -:*13 m ER* 38* 9he image is &&&&&&&&&&&&&&&* E'*A* real and erect E<* C* $irtual and erect E9*B* real and in$erted EV*D* $irtual and in$erted E*4:* 9he height of the image is &&&&&&&&&&&&&&* EG* A* :* ,: m EZ*C* :*0: m EH*B* :* /: m ?A*D* :*1: m ?B*4,* An ob=ect is located /: mm in front of a mirror# and its image is 1: mm in front of the mirror* hat is the focal length of the mirror. ?C*A* -,0 mm ?E*C* ,0 mm ?D* B* -1: mm ??* D* 1: mm ?@* 4/* An ob=ect is located /: cm in front of a conca$e mirror )hose radius of cur$ature is /: cm* 9he image of the ob=ect is &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&* ?+* A* real# in$erted# and bigger than the ?* C* real# in$erted# and smaller than the ob=ect ob=ect ?* D* $irtual# upright# and smaller than ?I* B* real# in$erted# and same si7e as the ob=ect the ob=ect ?L* 40* A cur$ed piece of glass or other transparent material that is used to refract light is called aan&&&&&&&&&&&* ?;* A* mirror ?* C* reflector ?!* B* lens ?P* D* optical fiber ?* 41* Parallel light ra"s emerged through a conca$e lens* hat 2ind of image is produced. ?R*A* !o image ?9* C* nl" a $irtual image ?'* B* nl" a real image ?<* D* Both real and $irtual image ?V*43* A lens produces a real image b" causing light ra"s from a co mmon point to &&&&&&&&&&&&&&&&&&&&&&&&&* ?* A* reflect constructi$el" ?H*C* disperse into different )a$elength ?G* B* con$erge and intersect at a point ?Z*D* di$erge and appear to come from a point @A* ?or 44-46# refer to the diagram belo)%
@B* Princip
0.10
Objec
axis
C
Concav e mirror
F
@C* @D* 44* +o) far is the image from the mirror. @E* A* :*,: m @@* C* :*0: m @?*B* :*/: m @+* D* :*1: m @I* 45* At )hat distance from the mirror should an ob=ect be placed to produce a $irtual image. @* A* :*:3 m @L* C* :*0: m @* B* :*,: m @;*D* :*3: m @!* 46* As the ob=ect is mo$ed from C to ?# the si7e of the image &&&&&&&&&&&&&&&* @* A* decreases @* C* is unaffected @P*B* increases @R* D* none of these @'* 48* hat t"pe of lens is a magnif"ing glass. @9* A* Conca$e B* Plano-Conca$e
C* Plane @lass D* Con$e>
@<* 5:* +o) )ill "ou describe the image formed b" a conca$e lens if the ob=ect is placed at /?. @V* A* Real# in$erted and same height @G* C* Virtual# erect and magnified @* B* !o image is formed @H* D* Real# in$erted and reduced @Z* 5,* +o) )ill "ou describe the image formed b" a conca$e lens if the ob=ect in front of ?. +A* A* Real# in$erted and same height +C* C* Virtual# erect and magnified +B* B* !o image is formed +D* D* Real# in$erted and reduced +E* 5/* +o) )ill "ou describe the image formed b" a conca$e lens if the ob=ect is placed at ?. +?*A* Real# in$erted and same height ++* C* Virtual# erect and magnified +@* B* !o image is formed +I* D* Real# in$erted and reduced +* 50* A ra" of light passes through three parallel slabs of different indices of refraction as sho)n* If Ji is 0::# )hat is the angle the emerging ra" ma2es )ith the normal. +* +L* A* 0:: +;* B* 4:: +!* C* 8:: +* D* !ot enough information +P* +* +R* +'* +9* 51* hich of the follo)ing can produce an upright image that is smaller than the ob=ect. +<* A* conca$e mirror and conca$e lens +*C* con$e> mirror and con$e> lens +V* B* conca$e mirror and con$e> lens +G* D* con$e> mirror and conca$e lens +H* 53* 9he optical instrument that )or2s li2e a human e"e is the &&&&&&&&&&&&&&&&&&* +Z* A* camera IB* C* microscope IA* B* hand lens IC* D* telescope ID*
IE* Prepared b"% I?* I@* ;"lha +* Balta7ar I+* 'cience ,: 9eacher II* B!+'-9abing Dagat Anne> I* I* IL* 'ubmitted b"% I;* I!* ;r* Ponciano @* @arrido I* +ead 9eacher VI-'cience IP* fficer-In-Charge# B!+'-9abing Dagat Anne> I* IR* I'* Dr* Anita ;* Rom I9* Principal IV I<* IV* I* IG* 'ubmitted to% IH* IZ* +elen A* @utierre7 A* EP'-'cience B* C* !oted b"% D* E* Dr* Editha B* @regorio ?* IC- Chief in Curriculum Implementation Di$ision @* +* Appro$ed b"% I* * Dr* Ruth L* ?uentes * 'chools Di$ision 'uperintendent L* ;* !* * P* * R* '* 9* <* V* * G* H* Z* A* B* C* D* E* ?* @* +* I* * * L* ;* !*
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;*08*D ;L*1:*D ;;* 1,*C ;!*1/*C ;*10*B ;P* 11*C ;*13*A ;R*14*B ;'* 15*C ;9* 16*C ;<*18*A ;V*3:*B ;* 3,*A ;G*3/*D ;H*30*A ;Z*31*A !A* 33*B !B* 34*A !C* 35*B !D* 36*A !E* 38*B !?*4:*D !@* 4,*C !+* 4/*B !I* 40*B !* 41*C !* 43*B !L* 44*B !;*45*A !!* 46*B !* 48*D !P*5:*A !* 5,*C !R* 5/*B !'* 50*A !9* 51*D !<* 53*A NV.
