bengkel fizik2011

8/12/2019 BENGKEL FIZIK2011

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BENGKEL FIZIK

DI

SMK

SULTAN IBRAHIM SATU

PADA

13.10.2011

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KNOWLEDGE, UNDERSTANDING, APPLICATION (KUA)

1 Diagram 1 shows a student pulling a bag of mass 30 kg with forceF = 250 N.Rajah 1 menunjukkan seorang pelajar menarik bag berjisim 30 kg dengan daya F

250N

Diagram 1

(a !hat is meant b" force#

Apakah yang dimaksudkan dengan daya?

............$.$$$$$$$$$$$$$$$$$$$$$$$$$...

% 1 mark &

(b (i 'n Diagram 1 mark and label the hori)ontal componentFx of the*orce *.

Pada Rajah 1 !anda dan labelkan komponen u"uk Fx bagindaya F

i!u#% 1 mark &

(ii +alculate the magnitude ofFx$i!ungkan magni!ud daya Fx#

% 2 marks &

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(c ,he frictional force between the rough surface and the trolle" is 15 N.

+alculate the acceleration of the trolle"#

%aya geseran an!ara permukaan kasar dengan !roli adalah 15N#$i!ngkan pe&u!an !roli i!u#

% 2 marks &

2 Diagram 2.1 shows the image of a patient-s teeth seen in a mirror used b" a

dentist.

Rajah 2#1 menunjukkan imej gigi seorang pesaki! diliha! didalam &ermin yang

digunakan oleh seorang dok!or#

Diagram 2.1

(a Name the t"pe of the mirror used b" the dentist.

Namakan jenis &ermin yang digunakan oleh do&!or i!u#

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$.... % 1 mark&

(b tate the light phenomenon that causes the image of the teeth.

Nya!akan "enomena &ahaya yang menyebabkan pemben!ukan imej gigi

i!u#

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$.... % 1 mark&

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(c tatetwocharacteristics of the image formed.

Nya!akan dua &iri'&iri imej yang !erben!uk#

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$....

$$$$$$$$$$$$$$$$$$$$$$$$$$$............ % 2 marks&

(d /n Diagram 2.2 below the arrow represents the teeth as the obect of the

mirror.+omplete the ra" diagram b" drawing the reuired ra"s to locate the

position of the image.

%alam Rajah 2#2 di ba(ah ini anak panah me(akili gigi sebagai objek

kepada &ermin# )engkapkan sinar &ahaya dengan melukis sinar'sinar!er!en!u un!uk menunjukkan kedudukan imej#

Diagram 2.2

% 3 marks&


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KUA , CONCEPTUALIZE.

3. Diagram 3.1 and 3.2 shows two current carr"ing wires and 4 with different directionof the electric current. agnetic field produced around the wires.

Rajah 3#1 dan Rajah 3#2 menunjukkan dua da(ai memba(a arus P dan * dengan

arah arus yang berla(anan# +edan magne! !erhasil disekeliling da(ai i!u#

Diagram 3.1 Diagram 3.2

Rajah 3#1 Rajah 3#2

(a (i ark the direction of the magnetic field around wire and wire 4 in Diagram

3.1 and Diagram 3.2.,andakan arah medan magne! disekeliling da(ai P dan da(ai * dalam

Rajah 3#1 dan Rajah 3#2

% 1 mark &

(ii tate the rule that is used to determine the direction of the magnetic field in(a.

N"atakan peraturan "ang digunakan bagi menentukan arah medan magnet

dalam (a.

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$.

% 1 mark &

5

P

0.5 A

Q

1 A


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(b 'bser6e Diagram 3.1 and Diagram 3.2 state the relationship between the electric

current the densit" of magnetic lines and the strength of the magnetic field.

Perha!ikan Rajah 3#1 dan Rajah 3#2 nya!akan hubungan an!ara arus elek!rikke!umpa!an medan magne! dan kekua!an medan magne!#

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ % 2 marks&

(c Diagram 3.3 shows a current carr"ing magnet is placed in between two piece ofpermanent magnet with opposite poles facing each other. !ire was obser6ed to

mo6e downward.Rajah 3#3# menunjukkan sa!u da(ai memba(a arus dile!akkan di an!ara dua

ba!ang magne! yang berlaanan ku!ub mengadap sa!u sama lain#

Diagram 3.3

(i ketch the magnetic field pattern formed between the North and outh pole of

the magnets in Diagram 3..

)akarkan &orak medan magne! yang !erhasil an!ara ku!ub -!ara dan .ela!an

magne! !ersebu!#

7

P

N S

N S


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Diagram 3.

(ii ketch the resultant magnetic field pattern around wire in Diagram 3.5.)akarkan &orak medan magne! paduan disekeliling da(ai P dalam Rajah 3#/#

Diagram 3.5% 2 marks&

(iii 89plain how wire mo6es downward in the magnet magnetic field shown

in Diagram 5.5

,erangkan bagaimana da(ai P bergerak keba(ah dalam medan magne!seper!i yang di!unjukkan dalam Rajah 5#5#

$......$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$.. % 2 marks&

4 Diagram .1 shows the position of a bar magnet before and after the bar magnet is

mo6ed inside the solenoid.Diagram .2 shows the position of a conductor coil before and after it is mo6ed

downwards inside a magnetic field.

Rajah /#1 menunjukkan kedudukan seba!ang magne! bar sebelum dan selepasmemasuki sa!u solenoid#

Rajah /#2 menunjukkan kedudukan sa!u gelung konduk!or sebelum dan selepas di

gerakkan keba(ah di dalam sa!u medan magne!#

(a (b

:

N S

P


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Dia!a" 4.1

(a (b

Dia!a" 4.2

(a 'n Diagram .1 (b and Diagram .2 (b draw the pattern of the magnetic fields

for the permanent magnets.

Pada Rajah /#1 b dan Rajah /#2 b lukiskan &orak medan magne! bagimagne! kekal i!u#

%2 marks&

(b !hat happens to the magnetic field lines in Diagram .1(b and Diagram

.2(b#

Apa yang berlaku kepada garis medan magne! pada Rajah /#1 b dan Rajah/#2 b?

$$$$$$$$$$$$$$..

$$$$$$$$$$$$$$$$$..

%1 mark&

(c ;sing Diagram .1 and Diagram .2 compare the deflection of the pointer of

the microammeters.+enggunakan Rajah /#1 dan Rajah /#2 bandingkan pesongan jarum penunjuk

mi&rome!er i!u#

$$$$$$$$$$$$$$$..$$$$$$$$$$$$$$$$.

$$$$$$$$$$$$$$$..$$$$$$$$$$$$$$$$.

%2 marks&


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(b *reuenc" of the wa6es is 70 @A). +alculate the wa6e length of the wa6es.

%Belocit" of the light = 3.0 9 10,' channel is

unclear. /n order to recei6e the channel more clearer

+enggunakan sis!em penerimaa pada Rajah 5 paparan saluran A.,R4kurang jelas# 8agi menerima saluran lebih jelas9

(i tate the distance between the recei6er and the parabolic disc .Nya!akan jarak an!ara penerima dan &akera parabola#

...............................................................................................% 1 mark &

(ii 89plain "our answer in (d (i.

,erangkan awapan anda pada (d (i.

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

% 2 mark &

(iii tate the position of the recei6ing s"stem.

Nya!akan kedudukan sis!em penerima i!u##

$$$$$$$$$$$$$$$$$$$$$$$$$$$$.....

% 1 mark &(i6 @i6e o#$reason for "our answer in (d(iii.

8erikan sa!u sebab un!uk ja(apan anda pada d iii.

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$.

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% 1 mark &

7. >li wishes to design a securit" s"stem in his house as shown in Diagram 7.1.!hen a person crosses the infra red beam at night the infrared sensor will send a

signal to a logic gate which then lights up a spotlight. ,he spotlight has a 20 B

alternating current (a.c suppl" and will onl" light up at night.

Diagram 7.1

,he circuit that could help >li to de6elop the securit" s"stem is shown in

Diagram 7.2.

(a /f the potential difference across resistor ! is 2 B what is the potential difference

across the infrared sensor#

.........................................................................................................................................

.

%1 mark&

11

Diagram6.2


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(b +omponent E has a high resistance when the surroundings are dark and low

resistance in bright surroundings. Name the component E.

.........................................................................................................................................

.

%1 mark&

(c +omponent Sis a switch that connects to the 20 B a.c spotlight circuit.(i !hat t"pe of switch is component would be#

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$...

%1 mark&

(ii !h" component Sis necessar" in the circuit#

............................................................................................................................

.%1 mark&

(d ,he following truth table shows the operation of a logic gate in the circuit in

Diagram 7.2.

Fe"

Dark surroundings high input 6oltage at logic 1

Gright surroundings low input 6oltage at logic 0 H

erson crossing the path high input 6oltage at 4 logic

1 H

Nobod" crossing the path low input 6oltage at logic 0 H

witch is on high output 6oltage at logic 1 H

witch in off low output 6oltage at logic 0 H

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(i ;sing the gi6en ke" complete the thruth table abo6e.( marks

(ii Name the logic gates in the circuit in Diagram 7.2

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$(1 marks

(iii ketch the s"mbol of the logic gate in (d (ii.

(1 marks

KUA, DECISION &AKING

Diagram :.1 shows an electric iron with specification of 20 B 1000 !.

DIAGRA& *.1

RA+A *.1

/N;, /N;, 4

';,;,

urroundings /nput

6oltage at

erson

crossing

/nput 6oltage

at 4

Gright 0 No 0

Gright Ies

Dark NoDark Ies

13

Aeating element


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Diagram :.1

(a !hat is meant b" specification 20 B 1000 !#

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$....

%1 mark&

(b ,he electric iron is connected to a 20 B suppl" and used to iron clothes

for 30 minutes. +alculate

(i the current that passes through the heating element in the iron.

%2 marks&

(ii the cost of using the electric iron in 30 da"s if the cost of electricit" b",enaga Nasionalis 23 cents per k! h for first 200 units.

%2 marks&

(a > student conducts an e9periment to compare the heating effect of bread

toasters P -and R. ,wo slices of bread is toasted each time. ,able ?.1

shows the result of the e9periment.

Gread

,oaster

otential

Difference VJB+urrentIJ>

,ime to toast 2

slices of bread tJs

P 20 7.0 ?0- 20 5.0 150

R 20 .0 120

,able :.1

(i +alculate the energ" supplied b" each of bread toaster to toast the bread.

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% marks&

(ii ;sing "our answer in (&(i state which bread toaster is most suitable.@i6e tworeasons for "our answer.

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

%3 marks&


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(i the image distance#

$$$$$$$$$$$$$$$$$$$$$$$$$$$$

%2 mark&

(ii Kinear magnification#

%1 mark&

(d Iou are gi6en another con6e9 lens I with power 2 D. Iou are reuired to

create a simple astronomical telescope using con6e9 lenses E and I.

(i !hich lens is suitable to be obecti6e lens and e"epiece#

'becti6e lens $$$$$$$$$$$$

8"epiece $$$$$$$$$$$$%2 mark&

(ii @i6e one reason to "our answer in (d (i.

$$$$$$$$$$$$$$$$$$$$$$$$$$$

%1 mark&

(e Draw the arrangement of the lenses and sketch the ra" path from distance

obect using con6e9 lenses E and I to form a simple astronomicaltelescope.

%3 mark&

SECTION %

Diagram ?.1 shows a stationar" pistol on a smooth surface.

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Diagram ?.2 shows the pistol and bullet after the pistol has been fired b" remote

control.

Rajah?.1 menunjukkan sebuah pis!ol pegun di a!as permukaan li&in.Rajah?.2 menunjukkan pis!ol dan peluru selepas !embakan dilepaskan se&ara

ka(alan jauh#

Diagram ?.1Rajah?.1

Diagram ?.2

Rajah?.2

(a (i !hat is the meaning of momentum#

Apakah maksud dengan momen!um?

%1 mark&

(ii tate the total momentum of the pistol and bullet in Diagram ?.1

;sing Diagram ?.1 and Diagram ?.2 compare the total momentum

before and after the bullet is fired.;sing Diagram ?.2 compare the magnitude and direction of the

momentum of the bullet and pistol.

1:

tationar" pistol

Pis!ol pegun

Gullet mo6es at high speed

Peluru bergerak dengan

laju !inggi

istol recoils at lower

speed

Pis!ol !ersen!ak denganlaju yang lebih rendah


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Name the ph"sics principle that can be applied to the motion of the

bullet and pistol.

+enggunakanRajah?.1 danRajah?.2 bandingkan jumlah momen!umsebelum dan selepas peluru i!u di!embak#

+enggunakan Rajah?.2 bandingkan magni!ud dan arah momen!um

peluru dan pis!ol#Nya!akan prinsip "iik yang boleh diaplikasi kepada gerakan peluru danpis!ol i!u#

%5 marks&

(b Describe in terms of momentum the propulsion of a rocket engine.

,erangkan dalam sebu!an momen!um rejangan sebuah enjin roke!#

% marks&

(c Diagram ?.3 shows a the structure of a et engine for a small et plane.

Rajah?.3 menunjukkan s!ruk!ur sebuah enjin je! bagi sebuah kapal !erbang

je! yang ke&il#

Diagram ?.3 JRajah?.3

1

(ii 8 = t

=1000

1000E

70

30E 30 JJ 15 units

= 3.5

(c (i @ !

8 = 20 E 7 E ?0 = 12? 700 O

84 = 20 E 5 E 150 = 1


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(b

(c

1

1

1

1

1

1

1

1

1

1

1

1

1

1

C Kiuid o9"gen and liuid h"drogenJfuel is pump into the

combustion chamber for combustionC ,he e9haust gas is eected out of the rocket no))le at high

speed.

C ,he eected e9haust gas at high speed has a large

momentum.C >ccording to the rinciple of +onser6ation of omentum

the rocket acuires a large momentum forward

Stat$ a9$t o 75a;$ o!!$t5 fle9 +ables are rated according to

the current (10 > which the"can carr" safel" without

o6erheating.

+onnect 13 > fuse to the li6e

cableJwire

+urrent flows is high JJ can

protect us b" switching theappliance off if a fault occurs.

,hree pin main plug ,o connect the earthcableJwire.

,he most suitable wiring to beused is .

,hreeCcore fle9 cables cablesrating 13 > fle9 13 > fuse

connect to li6e cable and three

pin main plug.


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@ 1 //

2 ///

@ /./: "

1

,otal 20

T0!$$ o!$ 5$6 a75$

35


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E5$t!i a75$ a#; 5$6

>lthough cable and fle9 ma" look similar the" are used for different purposes. +able is

used for wiring electrical circuits while fle9 is used to connect electric appliances andlamps to electric circuits. Goth consist of a protecti6e B+ sheath that holds a number of

cores (the metal conductors that carr" the electric current. 8ach core will ha6e a colour

coded B+ co6er (although the earth core in electric cable is often bare reuiring "ellowCandCgreen slee6ing to be fitted.

Ca75$

,he most common cable will ha6e three cores and is called twoCcoreCandCearth cable.

*rom 1st>pril 2007 the colourCcoding s"stem for core sheaths in electric cable changed. /f

planning to carr" out some wiring work "ou will need to use cable with the new colour

coding s"stem when it is more than likel" that wiring in "our house ma" ha6e the oldcolour code s"stem so it is important to know both colour coding s"stems.

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