Download Student Number………………………………

Student Number……………………………….
ROSEVILLE COLLEGE
2006
Preliminary Course
Yearly Examination
PHYSICS
General Instructions






Reading time – 5 minutes
Working time – 2 hours
Board approved Calculators can be
used.
Write using blue or black ink
Draw diagrams using a pencil
Write your student number and/or
name at the top of every page
Section A
Total marks 20
Allow about 20 minutes for this section
Section B
Total marks 60
Allow about 1 hour and 40 minutes for this
section.
This paper must not be removed from the Examination Room
11Physics September 06
-1-
1
A light wave with a frequency f has a wavelength . When a second light wave with a
frequency of 2f is shone alongside the original wave, the second wave:
(a)
(b)
(c)
(d)
travels faster
travels slower
has a wavelength of 2.
has a wavelength of /2
2 A wave is a spring is represented below. It is shown to scale
The frequency of the the wave is 150 Hz. The velocity of the wave is closest to:
(a)
(b)
(c)
(d)
6.8 ms-1 _
32 ms-1
0.03 ms-1
340 ms-1
3 Radio waves interact with the ionosphere in order to communicate with somebody a long
distance away. The property of waves that allows this to occur is that waves are able to
(a)
(b)
(c)
(d)
refract
reflect
transmit
absorb
4 The amount of energy that can be stored in a mobile phone battery is expressed as the number of
“milli amp-hours”. How much energy has a 4.8 volt battery delivering 50 milli amps for half
an hour delivered?
(a)
(b)
(c)
(d)
240 milli amp-hours
120 milli amp-hours
25 milli amp-hours
2.4 milli amp-hours
11Physics September 06
-2-
5 Four circuits are set up as shown below.
All sources of potential difference are 12V and each light bulb is 1 Ohm. Which of the circuits
would have the brightest light bulbs?
(a) I and II
(b) I and III
(c) III
(d) III and IV
6 An electric circuit was connected as shown: If a voltmeter is connected between points A and B,
the reading on this voltmeter would be:
(a)
(b)
(c)
(d)
20 volts
11 volts
9 volts
0 volts
11Physics September 06
-3-
7 An individual electric field line around a charge Q:
(a)
(b)
(c)
(d)
shows the direction of the force on a charge placed near charge Q
tells the strength of the force on a charge placed near charge Q
shows how a magnet would move near charge Q
is not affected by another charge placed near charge Q
8 Two 20 resistors are connected in parallel each across a 10V supply as shown in the diagram
below. The current flowing through each resistor is:
20
20
(a)
(b)
(c)
(d)
10V
0.24A
0.5A
1.0A
2.0A
9 Which of the following wires would have the least electrical resistance?
(a)
30cm long, thick tungsten wire at 300C
(b)
30 cm long, thin tungsten wire at 300C
(c)
50cm long, thick tungsten wire at 500C
(d)
50 cm long, thin tungsten wire at 500C
10 A skydiver is free-falling towards the ground at a constant velocity: This must mean that..
(a)
(b)
(c)
(d)
the forces acting on the sky diver are in balance.
the total force on the sky diver is upwards
only gravity is acting on the skydiver
no forces are acting on the skydiver
11 When a truck with a speed v doubles its speed to 2v, it is correct to say that its:
(a)
(b)
(c)
(d)
kinetic energy doubles and its momentum doubles
kinetic energy increases four times and its momentum doubles.
kinetic energy doubles and its momentum increases four times.
both its kinetic energy and its momentum increase four times.
11Physics September 06
-4-
The following diagram shows a journey Winona made in a car and refers to questions 12 and 13
12
The average speed between the times of two and three hours is closest to:
(a)
(b)
(c)
(d)
20 kmhr-1
40 kmhr-1
60 kmhr-1
80 kmhr-1
13 Which graph best represents the velocity vs time graph for Winona’s Journey?
11Physics September 06
-5-
14 The diagram below shows two cars, each of mass 1000kg, approaching each other. Car A is
travelling North at 25 ms-1 and car B is travelling south at 20 ms-1
What is the total momentum of the cars immediately after the collision?
(a)
(b)
(c)
(d)
5 000 kg ms-1 North
5 000 kg ms-1 South
115 000 kg ms-1 North
115 000 kg ms-1 South
15 Which law of physics is best used to explain the danger of loose objects in cars during a
collision?
(a)
(b)
(c)
(d)
Newton’s First Law
Newton’s Second Law
Newton’s Third Law
The Law of Conservation of Energy.
16 Stars A and B have the same Luminosity. Let the apparent brightness of star A be L. Star B is 3
times further away than star A. The apparent brightness of star B will be closest to
(a)
(b)
(c)
(d)
3L
0.33L
0.11L
0.09L
17 According to the theory, which alternative below best describes what happened immediately
after the “Big Bang”?
(a)
(b)
(c)
(d)
The creation of galaxies
the expansion of matter
the transformation of radiation into matter
the transformation of matter into energy
11Physics September 06
-6-
18 Galileo’s work on planetary motion built upon the work of
(a)
Kepler
(b)
Newton
(c)
Hubble
(d)
Copernicus
19 The diagram below represents a bar magnet
N
P
Which alternative best predicts the direction of the magnetic field at point P?
(a)
(b)
(c)
(d)
20 Looking down on a table the diagram shows two wires that are placed on the table top at right
angles to each other. The size of the current is the same in both wires. The direction of
current flowing in these wires is shown below.
North
P
The magnetic field direction at point P is
(a)
into the table
(b)
out of the table
(c)
there is no field
(d)
South East
11Physics September 06
-7-
Part B-60 marks
Attempt all questions
Allow about 1 hour and 40 minutes for this part.
21 A plane is flying due East at 230 ms-1 encounters a cross wind of 40 ms-1 from the South.
Draw a vector diagram to determine the resultant velocity and bearing of the plane.
22
4
Draw a displacement time graph for the following journey.
 Travelling north at 2ms-1 for 3 seconds then..
 Travelling south at 1ms-1 for 2 seconds then..
 Stopping for 1 second.
4
11Physics September 06
-8-
23 A velocity time graph is shown below.
North
Veloc ity (m/s)
3
2
1
0
1
2
3
4
5
6
time (s)
1
2
3
South
(a) When exactly is the object going south? .......................................................................
1
(b) When is the object slowing down? ................................................................................
1
(c) What is the displacement of the object at 5 seconds? ...................................................
2
...................................................................................................................................
...................................................................................................................................
(d) Find the acceleration of the object at 1 sec. .................................................................
1
...................................................................................................................................
...................................................................................................................................
24 The following diagrams shows a ray of light entering a transparent material from air. By finding
the angles of incidence and refraction determine the refractive index of this transparent
material. Show all working clearly.
3
11Physics September 06
-9-
25 The following table shows the moons of Jupiter. Kepler stated that the Radius cubed was
directly proportional to the period squared.
Moon
Amalthea
Io
Europa
Ganymede
Callisto
Radius of Orbit
(km)
1.81x105
4.22x105
6.71x105
1.07x106
1.88x106
R3
(km3)
6.64x1018
Period (days)
0.5
1.77
3.55
7.16
16.69
T2
(days2)
278.56
(a) Complete the table by cubing the radius of each moon. (The last one has been done for you)
(b) Complete the table by squaring all the periods.
(c) Graph the R3 values against the T2 values.
(d) Draw a straight line of best fit through these points.
4

Orbital Radius Cubed (km3)
6x1018
4x1018
2x1018
200
100
Period Squared (days2)
11Physics September 06
-10-
300
26 A student is testing Newtons Second Law by using the apparatus shown.
700g
mass carrier and
5 masses. (300g
total mass)
Her aim is To see if the acceleration of the system is directly proportional to the force.
(a) Calculate the force acting on this system as shown in the diagram above?
1
...................................................................................................................................
...................................................................................................................................
(b) How should the student vary the force acting on this system? .....................................
1
...................................................................................................................................
(c) Suggest how the student could obtain a value for the acceleration of the system. Give the names
of the equipment and the process she should use.
3
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
Acceleration (m/s/s)
d) The student graphs her data as shown and discovers that the slope of the line is close to 1.
Explain why that value is significant.
.............................................................................
.............................................................................
.............................................................................
.............................................................................
.............................................................................
Force applied (N)
11Physics September 06
-11- .............................................................................
2
27 Two ice skaters are skating towards each other. One is travelling south at a speed of 7.2 ms-1
and has a mass of 80 kg. the other is travelling north at a speed of 3.2 ms-1 and has a mass of 54 kg.
They collide and are entangled together such that they move off as one.
Calculate the speed and direction of the ice skaters after the collision.
3
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
28 Three identical spheres on insulating stands are placed next to each other so their metal surfaces
are touching.
a
b
c
A charge Perspex rod is placed near to sphere C.
Sphere A is then moved to the right so it is no longer touching the other two spheres.
Predict the charge on sphere A and justify your answer.
3
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
11Physics September 06
-12-
29
Below is a Hertzsprung Russell Diagram showing many of the nearby stars in our galaxy.
10
-2
10
5
4
0
10
2
10
4
6
3
2
10
1
Q
10
8
10
10
10
-1
-2
-3
12
10
P
14
10
B
A
F
G
K
M
-4
-5
N
(a) What do the X and Y axis represent in this graph? .........................................
2
..............................................................................................................................
..............................................................................................................................
(b) Label the Main Sequence, Red Giant region and white dwarf region? ..........
1
..............................................................................................................................
..............................................................................................................................
(c) Compare Star P and Star Q shown on the diagram. (ie: say what is similar and different)
2
..............................................................................................................................
..............................................................................................................................
..............................................................................................................................
..............................................................................................................................
30 Describe an example in real life where an object in motion may have a positive velocity but a
negative acceleration
2
..............................................................................................................................
..............................................................................................................................
..............................................................................................................................
11Physics September 06
-13-
31
A student has been given these three equations of motion.
r=ut + ½ at2
v2=u2 + 2ar
(a) Complete the table below, the first line has been done for you.
Symbol
Quantity
Standard Units of
measurement
r
displacement
m
a= (v-u)/t
Vector or scalar?
vector
u
v
a
t
1
(b) Use the equations above to solve these questions.
A man throws a ball upward at 19.6 ms-1. He catches it 4 seconds later.
(i) How high does the ball go above the man before it stops? .................................................
2
........................................................................................................................................
........................................................................................................................................
........................................................................................................................................
(ii) How long does it take to reach this maximum height? ......................................................
2
........................................................................................................................................
........................................................................................................................................
........................................................................................................................................
(iii) How fast is the ball going when it approaches his hands? ................................................
1
........................................................................................................................................
........................................................................................................................................
11Physics September 06
-14-
32
Below is a diagram of the Copernican Model of the Universe.
Saturn
Mars
Venus
Jupiter
Mercury
(a) Show clearly on the diagram the following:
The Moon, The Sun, The Earth and The Celestial Sphere of stars. ................................
2
(b) Explain why this model was such a dramatic break through in our understanding of the
universe?
2
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
(c) Describe four major differences between our universe model and that of Copernicus.
4
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
11Physics September 06
-15-
33 A magnet is fixed above a current carrying solenoid. The solenoid is resting on an electronic
balance.
The current through the solenoid is varied and the reading on the electronic balance recorded
Current (A)
1
2
4
8
Reading on Balance (g)
122
111
89
45
a) plot these points on the graph
2
140
120
Reading on
Scales.
Mass in grams
100
80
60
40
20
2
4
6
8
10
12
Current in solenoid (A)
Question continues on the next page
11Physics September 06
-16-
b) find the mass of the solenoid, showing clearly on the graph how this was obtained.
1
...................................................................................................................................
c) Was the magnetic pole at X a north pole or a south pole? Explain exactly how you came to this
decision.
1
...................................................................................................................................
...................................................................................................................................
d) Ignoring the mass of the connecting wires, use the graph to find the current required to suspend
the solenoid in mid air. Explain your method.
2
...................................................................................................................................
...................................................................................................................................
This is the end of the paper!! 
11Physics September 06
-17-