Physics Formulae &Data Sheets are attached to the back of this paper. o The
Multiple Choice Answer Sheet is attached to the back of this paper. Carefully tear
it ...
2005 PRELIMINARY COURSE FINAL EXAMINATION
PHYSICS 2 uNrr This examinationhasTWO oarts. Part A
Multiple Choice
.
Assessment TaskNo. 5
.
Weighting-30Yo
Total marks(15) o AttemptALL Questions1 to 15 . Mark your answerson the Multiple ChoiceAnswer Sheetprovided. . Allow about25 minutesfor this part.
r
Readingtime - 5 minutes
Part B
.
Working time - 2 hours
.
PhysicsFormulae&Data Sheetsare attachedto the back of this paper.
Total marks(55) e AttemptALL Questions16to 26 . Write your answersin the spacesprovidedin this Exam Paper. . Allow aboutI hour and35 minutesfor this part.
General Instructions
o TheMultiple ChoiceAnswerSheetis attachedto the back of this paper. Carefullytear it off readyfor useand write your nameon it.
ExtendedAnswer Questions
PartA-15rnarks Attempt Quesdo4s 1-15 AIIow about ztminutes for this part
Use the multiple-choice answer sheetSelect the alternative A,B,C or D that best answers the question. Fill in the response oval completely. Sample:
2+4=
(A) 2
(B) 6
(C) 8
(D) 9
A O
B ( D
C O
D
lf you think you have made a mistake, put a cross through the incorrect answer and fill in the new answer.
A ( D B X
C O
D
If you change your mind and have crossed out what you consider to be the correct answer, then indicate the correct answer by writing the word comect and drawing an arrow as follows.
A ( D B X C O \
correct
D
A wave travelling in a guitar string was photographed. The results are reBresentedin the diagram below:
The frequency of the note produced by the guitar string was 540H2. 't
Ttie velocity of the wavein the guitarstringwas: (A)
135ms-r
(B)
2o2.5ms-l
(C)
270ms-t
(D)
405ms-1
The Earth's atmosphereis most effective in shielding the Earth's surface from which wavebandsof the electromagneticspectrum? (A)
gamma rays, UV, radio
(B)
gamma rays, UV, microwave
(C)
gamma rays, X-rays, UV
(D)
X-rays, UV, infra-red
3. The law which best explains why momentum is conserved in a collision is: A B C D
Newton's lst Law Newton's 2nd Law Newton's 3rd Law Newton's Law of Universal Gravitation
4. The diagrambelowshowslight movingthroughan opticalfibre.
Glassof higherp
Optical fibres work using the phenomenon of total internal reflection of light. For total internal reflection of light to occur, the light must strike the boundary bdtfueenthe two glass media with:
A. an angle of incidencelessthan the critical angle B. an angle of incidence greater than the critical angle C. an angle of reflection greater than the critical angle D. an angle of reflection equal to 90o
Two bar magnets were uurangedas shown.
P
When the north pole of a third bar magnetwas placedat point "P", the force experiencedby the third magnetwas in which direction?
(A)
up the page
(B)
down the page
(c)
to the right
(D)
to the left
+
Several circuits were constructedusing identical4.0 ohm resistors. In which circuit has the resistor labelled "X" the most current flowing through it?
(B)
(A)
(D)
{
7
In which of the following circuits will tk potential difference across the globe and the current through the globe be measuredcorrectly?
(A)
(B)
(D)
8
A force of lON directed towards the centre of a circular track was required to keep a toy car moving with a constant speed v . When the speed of the same car on the same track is increased to 3r, the force needed to keep the car on the track becomes:
(A)
30N
(B)
60N
(c)
90N
(D)
120N
T
An ohmic resistance had the potential difference across it and the current through it measured for several different voltages. When the results were pl,otted as a V versus I graph, the shape of the graph would most closely resemble: (A)
(B)
v
v
I
(c)
(D)
V
v
10
A car began acceleratingfrom rest and then stopped quickly- After waiting a short time, it then moved off again in the opposite direction. Which graph of velocity versustime could this car have made? (A) v
(B) v
+
+
1
11. Whenworn correctly,seatbeltshavethe effect of; A. Decreasingthe occupant'skinetic energyfaster. the occupant'skineticenergymoreslowly. B. Decreasing C. Increasingthe impulseon the occupant. D. Decreasingthe impulseon the occupant.
The Copernicus model of the universe improved on earlier models especially in explaining which aspectof the universe?
L2
f
13
(A)
the phasesof the moon.
(B)
shootingstars.
(C)
sunrise and sunset.
(D)
the observedmotions of the stars and planets-
A star's position on a Hertzsprung-Russelldiagram is shown below as "X"
fl ls" /r/e
lulaXn;4,,12
-r +.r
/oo66
Sooo
{u^p+nfrre k)
During the courseof the star'slife, it becomeshotter andmuchlarger. Its positionon theHertzsprung-Russell diagramwill movein the direction: (A)
A
(B)
B
(C)
C
(D)
D
I
14
Place these different stages in the formation of the universe into their correct order: (i)
expansionand cooling of the universe
(ii)
the Big Bang
(iii)
gravitationalattractionbetweenparticles
(iv)
transforrnation of radiation into matter
(v)
lumpiness of the gas cloud that allowed gravitational collapse
(A)tj
(iv), (ii), (i), (v), (iv)
(B)
(i), (ii), (iii), (iv), (v)
(C)
(ii), (iii), (iv), (v), (i)
(D)
(ii), (i), (iv), (iii), (v)
The following diagram shows a journey Winona made in a car and refers to question | {. Distance vs Time 600 500 400 I
o tr 300
C'
so
i5 200 100
o 0.o0
'
/{
The averagespeedbetween the times of two and three hours is closest to: A B C D
20 kmh'r -t 40 kmh 60 kmh-t -1 80 krnh,
7
PhysicsPreliminary 2005
Part B 55 marks Attempt Questions16-26 Allow ebout 90 - 95 minutes for this section ll{ar{
