1. FIZIK K2 SET A- SOALAN.doc

8/14/2019 1. FIZIK K2 SET A- SOALAN.doc

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Fizik

Kertas 2

Set A

2011

2 jam

PEJABAT PELAJARAN AERA! "ELAKA TEN#A!

LAT$! T%B$ PRRA" PERK&N#S$AN P$NTAR ' (& )

B$AN# SA$NS AN "ATE"AT$K

SEK&LA! "ENEN#A!

AERA! "ELAKA TEN#A!

SP" 2011LA! BERASRA

F$*$K

KERTAS 2

+a jam ti,a -+.+ miit

JAN#AN B%KA KERTAS S&ALAN $N$ SE!$N##A $BER$TA!%

1


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Section A[60 marks]

Answer all questions in this section

1.

(a) (i) Name the measuring instrument B. [1 mark]

____________________________________________________________

(ii) What is the function of the measuring instrument A in the circuit? [1 mark]

____________________________________________________________

(b) Diagram 1.2 shows an electrical meter.

4

A

B

Diagram 1.1

Diagram 1.12


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(i) The instrument has ero error! what is the ero error? [1 mark]

____________________________________________________________

(ii) What is the accurac" of the electrical meter ? [1 mark]

____________________________________________________________

2. Diagram 2 shows the #elocit"$time gra%h for the motion of a car.

(i) What is meant b" #elocit"? [1 mark]

____________________________________________________________

(ii) What is the total &is%lacement tra#ele& b" the car? [3 marks]

____________________________________________________________

(iii) What is the a#erage #elocit" of the car along the 'ourne"? [2 marks]

____________________________________________________________

5

0 6 18 24

Time/s

Velocity / ms-1

4

Diagram 2


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. The Diagram shows three non$miing li*ui&s %lace in an enclose& tan+.

a) ,tate twofactors that affect the %ressure in li*ui&? [2 marks]

______________________________________________________________

______________________________________________________________

b) i) -alculate the %ressure &ue to the li*ui& at %oint . [1 mark]

_______________________________________________________________

ii) -alculate the %ressure &ue to the li*ui& at %oint /. [1 mark]

______________________________________________________________

iii) -alculate the %ressure &ue to the li*ui& at %oint 0. [1 mark]

______________________________________________________________

c) When the enclose& tan+ is &ro%%e& from a high %lace! what is the %ressure of! /! an& 0? %lain "our answer. [2 marks]

________________________________________________________________

________________________________________________________________

6

X

Y

Z

2m

1m

1m

= 0.8 X 103kgm-3

= 1.0 X 103kgm-3

= 1.1 X 103kgm-3

Diagram 3


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. Diagram shows a bar magnet being &ro%%ing to solenoi&. The bar magnetwill %ass through the solenoi&. The %oles of the bar magnet are as shown in&iagram. 3 an& 4 are the %olarit" of the solenoi&.

a) ,tate 5en6s 5aw. [1 mark]

_____________________________________________________________

b) ,tate the %olarit" of the %oles of the solenoi&. [2 marks]

37 _____________________________________________________________

4 7 _____________________________________________________________

c) Draw the &irection of the in&uce& current ! Iin Diagram [1 mark]

&) ,tate two wa"s to increase the magnitu&e of the in&uce& current. [2 marks]

_______________________________________________________________

_______________________________________________________________

e) Describe the changes in the &eflection of the gal#anometer %ointer when themagnet has 'ust %asse& through solenoi&. [1 mark]

_______________________________________________________________

_______________________________________________________________

7

Diagram 4


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8)

The Diagram 8 show two metal bloc+s 3 an& 4 of the same mass are beingheate& at the same rate. The heater %ower is 9w The heat ca%acit" of 3 is

:.;


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>. Diagram > shows a ste%$&own transformer.

(a) (i) ,uggest one suitable metal to be use& as metal in the transformer.

________________________________________________________________[1 mark]

(ii) %lain the reason for "our answer in >(a) (i) . [1 mark]

________________________________________________________________

(iii) The number of turns on the %rimar" coil is 2999 an& on the secon&ar" coilis 128. -alculate the out%ut #oltage of the transformer. [2marks]

________________________________________________________________

(b) The Diagram >.2 shows three i&entical bulbs of 12 @! 2 W! each connecte&in series to the secon&ar" coil of a transformer. The in%ut #oltage is 29 @from the mains su%%l".

"

Diagram 6.1

Diagram 6.2


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The %rimar" coil has >99 turns an& secon&ar" has 89 turns . The three bulbsare lighte& with normal brightness.

(i) What is meant b" normal brightness? [1 mark]

________________________________________________________________(ii) What is the out%ut #oltage of the transformer? [1 mark]

________________________________________________________________(iii) ) f the transformer is 199 efficient! calculate the current in the %rimar" coil. [2 marks]

________________________________________________________________


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(i#) f the wa#e has a fre*uenc" of 1 F! mar+ on the &iagram the &istance! D!tra#elle& b" the wa#e in 2 secon&. [1 mark]

b) The following Diagram


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(a) Name an eam%le of a %ure semicon&uctor. C1marks

____________________________________________________________

(b) (i) -om%are the connections of the &io&es in Diagram :.1 an& Diagram :.2.C1mark

____________________________________________________________

(ii) -om%are the ammeter rea&ings in Diagram :.1 an& Diagram :.2. C1mark

____________________________________________________________(c) ,tate two &ifference that cause the &ifference in the ammeter rea&ing in

Diagram :.1 an& Diagram :.2. C2marks

____________________________________________________________

____________________________________________________________

(&) ,tate the function of a &io&e. C1mark

____________________________________________________________

12

Diagram 8.1 Diagram 8.2


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(e) Diagram :. shows a full$wa#e bri&ge rectifier. The a.c. su%%l" has afre*uenc" of 89F

(i) when the %olarit" of the a.c. su%%l" #oltage is %ositi#e at A! state the two&io&es which are forwar& biase&. C1mark

________________________________________________________

(ii) When the %olarit" of the a.c. su%%l" #oltage is negati#e at A! state the two&io&es which are forwar& biase&. C1mark

_________________________________________________________

(iii) Gsing the aes in Diagram :.! s+etch the #oltage$time gra%h acrossresistor H. C2marks

(i#)) In Diagram :.8! s+etch the #oltage$time gra%h across the resistor if aca%acitor is connecte& across resistor H! %arallel with the resistor.

C2marks

13

Volt#ge / V

Time / ms10 20 30 40 50

0

Volt#ge / V

Time / ms10

2030

40 50

0

Diagram 8.3

Diagram 8.4


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14

Diagram 8.5


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Section B[20 marks]

Answer any onein section

;.) Diagram ; shows a ball %lace& onto smooth incline %lane at %oint 3. The ball

is rolling &own o#er the incline %lane cause& b" gra#itational %otential energ".3oint 4 an& %oint H are at the mi&&le of the incline %lane an& at the groun&res%ecti#el".

a) What is meant b" gra#itational %otential energ"? C1mark

b) (i) Gsing Diagram ;! com%are the height of the ball! the gra#itational %otentialenerg" of the ball! the #elocit" of the ball an& the +inetic energ" of the ball at%oint 3 an& %oint 4.

De&uce the relationshi% between the +inetic energ" an& the gra#itational%otential e#erg" of the rolling ball. C8marks

(ii) Name the %h"sical %rinci%le in#ol#e& in (b) (i) . C1mark

c) %lain what ha%%ens to the #elocit" of the ball when it reaches %oint H on thegroun&. C3marks

15

Diagram 9


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&) Base& on the %h"sical %rinci%le abo#e! "ou are re*uire& to &esign a rollers+ate trac+.

Gsing a%%ro%riate %h"sics conce%t! e%lain the &esign of the roller s+ate trac+ sothat it can be use& to oscillate s+ate boar& continuousl".

/our answer shoul& inclu&e the following as%ects 7(i) ,ha%e of the trac+(ii) ,lo%e of the trac+(iii) ,urface of the trac+(i#) ,afet"(#) Jaterial of the trac+ . C19marks

19.) Diagram 19.1 an& Diagram 19.2 show the gra%h of ra&ioacti#it" for two&ifference sources.

Diagram 10.1

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Diagram 10.2

a) What is meant b" ra&ioacti#it" ? C1mark

b) Gsing Diagram 19.1 an& Diagram 19.2! com%are initial ra&ioacti#e mass!rate of ra&ioacti#e &eca" an& time ela%se& for the two sources. Cmarks

c) ,tate the relationshi% between the fraction of ra&ioacti#e source that remainsan& the time ela%se& to &e&uce a rele#ant %h"sics conce%t. C2marks

&) The %roton number of uranium (G) is ;2. Granium$2>! one of the uraniumra&ioisoto%es! &eca" to Thorium$2 (Th) b" emitting an al%ha %article.

(i) Write the nuclear e*uation e%ressing the al%ha &eca" of

C2marks

(ii) Briefl" &escribe the change which occurs in the nucleus of Granium$2> &uring the &eca". C2 marks

2> G;2

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e) A &octor wants to &etect the %resence of bloc+ages in the bloo& #essels B"in'ecting a suitable ra&ioisoto%e as tracer into the bloo& stream of the %atient!a &octor shoul& be able to i&entif" the %art of bo&" that not recei#ing enoughbloo&.

Gsing "our +nowle&ge on ra&ioacti#it" an& Diagram 19.! e%lain on the followingas%ect 7

(i) The state of the ra&ioisoto%e(ii) T"%e of ra&iation of the ra&ioisoto%e use as a tracer.(iii) Falf$life of the ra&ioacti#e material.(i#) *ui%ment use& to &etect the ra&ioacti#e ra&iation from the flowing

bloo& in the #essels flow in the %atient.(#) Fow the &etection s"stem wor+s. C19marks

18

Diagram 10.3


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(iii) Fot water is %oure& into a glass which has a small crac+. t is obser#e&that the sie of the crac+ increases. %lain this obser#ation. C3 marks

12 (a) Diagram Aillustrates an electric bell o%erate& b" batter".

(i) What is meant b" the term electromagnet? C1mark

(ii) %lain wh" the hammer re%eate&l" stri+es the bell when the switch isclose&. C6marks

(iii) %lain wh" the bell also wor+s when a low #oltage a.c. is use& instea& ofthe &.c. su%%l". C mar+s

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(b) Diagram shows the National Eri& Networ+.

The following table gi#es information on four t"%es of cables that coul& be use&for the transmissions of electricit" o#er the National Eri& Networ+.

MaterialResistance (

km1)Density (kg m3)

Conductivity(Sm! Rate "ort#ermal

e$%ansion! 9.>: >.; 19 1.


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Answer &1.

2.

.

.

a)

b)

a)

&)

c)

a)

b)

c)

i)

i)

i)ii)

iii)

i)

ii)

iii)

Ammeter

To measure the 3otential Difference across constantan wire LLmeasure 3otential Difference between two %oint.

0ero error M 1AAccurac" M 1 A@elocit" is the rate of change of &is%lacementTotal &is%lacement M Area un&er gra%h M O C(1:$>)P(2) () M 999 3a$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$3"M 3P Qhg M 1>999 P (1.919

)(1)(19) M 2>999 3a$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$3M 3" P Qhg M 2>999 P(1.119

)(1)(19) M


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8

>

9 M 2


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: a)b)

c)

&)e)

ii)

i)ii)iii)

i#)

Trans#erse wa#eThe &irection of #ibration is %er%en&icular to the &irection of%ro%agation of the wa#e motion. D

Dis e*ual to a &istance of two wa#elengths.

$ Wa#elength becomes smaller.$ ,%ee& becomes smaller.$ Am%litu&e becomes bigger.vM fS M ; ; M :1 cm s $1

vM fS M ; M > cm s $1

,iliconDiagram :.1 is forwar&$biase& Diagram :.2 is re#erse$biase&The ammeter rea&ing in Diagram :.1 is higher but Diagram:.2 is eroThe connection of the &io&ean& the connection of the &r" cellt con#erts alternating current to &irect currentD1an& DDan& D2

2

11

11

111111

2

2

'

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;. a)

b)

c)

&)

i)

ii)

nerg" cause& b" #ertical %osition from groun&

$ The height of the ball at 3 at 4$ Era#itational %otential e#erg of the ball at 3 at 4$ The #elocit" of the ball at 4 at 3

$ The Kinetic energ" at 4 at 3$ The Kinetic energ" increases as the gra#itational %otentialenerg" &ecreases.3rinci%le of conser#ation of energ"

$ @elocit" increases$ Kinetic energ" maimum L increase$ Base& on the %rinci%le of conser#ation of energ"! gra#itational%otential energ" is ero because change& to maimum +ineticenerg".

$ ,emi circular cur#e sha%e&$ change between +inetic energ" an& gra#itational %otentialenerg" easil"$ ncreasing L &ecreasing slo%e slightl"$ asil" oscillates cause& b" changing of energ"$ ,mooth surface$ asil" to mo#es LL He&uce frictional force$ ,oft la"er at the surface$ He&uce im%ulsi#e force when lan&ing L acci&ent.$ ,trong material LL concrete of foun&ation of the trac+.$ Withstan& to the high force cause& b" 'um%ing an& lan&ing

1

111

1

11

11

1

1

111111111

'

19. a)

b)

c)

Ha&ioacti#e &eca" is the %rocess in which an unstable nucleusbecomes stable b" emitting ra&ioacti#e ra"s.

$ The initial ra&ioacti#e mass of Diagram 19.1 is same toDiagram 19.2$ the rate of ra&ioacti#e &eca" of Diagram 19.2 is faster thanDiagram 19.1

$ Diagram 19.1 ta+en longer time to ela%se& the sources thanDiagram 19.2

$ The time ta+en for the fraction of ra&ioacti#e source tobecome half is same to the time ta+en to ela%se& half of thesource.$ The time ta+en of both call half$life.

1

1

1

1

11

25


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&)

e)

i)

ii)

i)

$ The %roton in the nucleus of Granium will &ecrease from ;2to ;9 &uring the &eca"$ The number of neutron in the nucleus of Granium is remain1 &uring the &eca"

$ 5i*ui&$ because li*ui& state can flow with bloo&$ Eamma ra"$ Because it can easil" %ass through the tissues

$ must short (less than 2 hour)$ a#oi& the ra&iation sta" too long in the bo&"$ Eeiger$Juller Tube$ EJ tube can &etect the gamma ra"$ the ra&ioisoto%e emitte& the gamma ra"$ &etector trace or &etect continuousl" to monitor themo#ement of the ra&ioisoto%e

2

1

1

1111111

111

'

11. a) i)

ii)

,%ecific heat ca%acit" is the amount of heat re*uire& to raisethe tem%erature of 1+g of a substance b" 1K.

$ 5ow Densit"$ eas" to carrier the container L weight of container will be light

$ ,%ecific heat must high$ t able to recei#e more heat from eterior! LL it can remain thetem%erature in the bo.$ Figh Jelting %oint$ -an resist high tem%erature$Thermal con&ucti#it" must be low$ so that heat transfer between the bo interior an& theeterior surroun&ing is low.

1

11

11

111

1

26

2>

G M;2

22 Th P;9

Fe2


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b) i)

ii)

iii)

choose material - because it has low &ensit"! high s%ecificheat ca%acit"! high melting %oint an& low thermal con&ucti#it".

1 mar+ with correct ais with the unit.

1 mar+ for the sha%e of the gra%h1 mar+ for label with im%ortance %oint in tem%erature

4MmcRM9.299(:9$9)M:K= (1mar+ to correct unit)

When hot water is %oure& into the glass! the glass becomeshotter an& e%an&s.This causes the crac+ to get bigger.

11

11P1

111

'12.

a) i)

ii)

An electromagnet is ma&e b" win&ing a coil of insulate& wireroun& a soft iron core! so that it becomes a magnet when acurrent is %asse& through the coil.$When the switch is close&! current flows! the G$sha%e& ironcore becomes a magnetan& %ulls the iron armaturean& the hammer hits the bell

$When the armature is attracte& b" the electromagnet! the

contact between the armaturean& the screw is bro+er! the circuit is not com%lete!no current flows!the iron$core loses all its magnetism!the armature is %ull bac+ to its initial %osition b" the s%ring"steel! there is contact between the armature an& the screwagain.

1

Ja

Ja

Ja

27

80

30

/0

Time / s


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b)

iii) $The %rocess &escribe abo#e will re%eat continuousl" an&$cause the hammer to hit the bell re%eate&l".$The a.c will magnetie& the soft$iron too!$an& also attract the iron$armature

$ Hesistance must low$ less energ" loss U less heat %ro&uce$ Densit" must low$ cable is not hea#" LL eas" to carr"$ -on&ucti#it" must high$ more current can carr" L current eas" flow L less resistance$ Hate for thermal e%ansion must low$ less sagging (etension) of the cables in hot weather LL noetension in high tem%erate/ is most suitable because " has low resistance! low &ensit"!high con&ucti#it" an& low rate for thermal e%ansion.

111

11111

11

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1. FIZIK K2 SET A- SOALAN.doc

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