Ursuline
College Chatham
FINAL
EXAMINATION
PHYSICS
SPH
4A0
Date: February, 1999
Time: 2.0 hours
Name:
_______________________
INSTRUCTIONS:
1.
You may use an information
sheet which has been authorized by the teacher. This is to be submitted
with your examination answers.
2. You
may use a calculator, ruler, protractor, and compass. (NO pre-programmed formulas are allowed)
3. Assume
all data is accurate to the number of digits given and round off your answers
appropriately.
4. Your
solutions to the mathematical problems should contain enough detail that marks
may be allocated for incorrect solutions.
5. The
answers to PART A (Multiple Choice) should be recorded on the answer sheet
provided.
6. The
solutions to PARTS B and C are to be answered in the spaces provided on the
examination paper.
7. The
examination consists of the following parts.
The marks for each part and the time you should take to answer the
questions is shown below:
PART
A - Multiple Choice 15
marks 10 min
PART
B – Matching 25
marks 25 min
PART
C - Problem Solving 84
marks 85 min
(Do
7 out of 10)
TOTAL 124 marks 120 min
GOOD
LUCK!!!
PART
A - Multiple Choice (15
marks)
1) A
node is a point where there is always
(A) a
double crest
(B) a
double trough
(C) constructive
interference
(D) destructive
interference
(E) a
double rarefaction
2) This diagram shows two wave pulses
approaching one another:
Which
one of the following diagrams best represents the appearance of the medium when
the centres of the pulses coincide?
(A) (B) (C) (D) (E)
3) Two
waves, each of wavelength 5 m, travel in opposite directions in a stretched
string 20 m long. Excluding the nodes
at the fixed ends of the string, how many nodes appear in the resulting
standing wave pattern?
(A) 3 (B) 4 (C)
5 (D) 6 (E) 7
4) The
speed of sound outside is
(A) largest
in winter
(B) largest
in spring
(C) largest
in summer
(D) largest
in fall
5) A
light ray travelling parallel to the principle axis of a concave mirror hits
the mirror. It will be
(A) reflected
through the principle focus
(B) refracted
through the principle focus
(C) reflected
through the centre of curvature
(D) reflected
through the vertex
(E) reflected
back along its original path
6) A
ray of light travels from air toward glass at an oblique angle. At the interface, the ray
(A) is
totally reflected
(B) is
bent toward the normal
(C) is
bent away from the normal
(D) is
bent to travel along the normal
(E) travels
straight into the glass without bending
7) Pure
yellow light falls upon a sheet of white paper ruled with blue lines. As a result
(A) both
the paper and blue lines appear black
(B) the
paper appears white and the lines black
(C) the
paper appears yellow and the lines invisible
(D) both
the paper and the lines appear yellow
(E) the
paper appears yellow and the lines black
8) The
three primary light colours are
(A) yellow,
cyan and magenta
(B) blue,
green and yellow
(C) blue,
green and red
(D) red,
white and blue
(E) yellow,
white and magenta
9) The
unit of electrical potential difference is the
(A) ampere (D) ohm
(B) coulomb (E) volt
(C) kilowatt hour
10) If
the resistance of an electrical circuit were halved and the voltage applied to
the circuit doubled, the current in the circuit would
(A) be
four times as large
(B) be
twice as large
(C) remain
the same
(D) be
half as large
(E) be
one quarter as large
11) Which
one of the following instruments can be used to read directly the potential
difference across a resistor in an electrical circuit?
(A) ammeter
(B) galvanometer
(C) ohmmeter
(D) potentiometer
(E) voltmeter
12) What
is the effect when a second identical resistor is added in series in a circuit
containing one resistor and a dry cell?
(A) The
resistance of the circuit decreases.
(B) The
resistance of the circuit increases.
(C) The
current through the original resistor stays the same.
(D) The
voltage drop across the original resistor stays the same.
(E) The
voltage drop across the original resistor increases.
13) A single straight conductor carries
electrons out of the plane of the paper toward you as shown.
What
direction and shape are the magnetic field lines?
(A) clockwise
concentric circles around the conductor
(B) counter-clockwise
concentric circles around the conductor
(C) straight
lines radiating outward from the conductor
(D) straight
lines radiating inward toward the conductor
(E) straight
lines directed from left to right on the page
14) The diagram illustrates a straight wire
conductor situated between the poles of a permanent magnet. The poles of the magnet are in the plane of
the page, and the wire is perpendicular to the plane of the page. The wire is carrying an electron flow away
from you into the plane of the page as indicated by the cross.
The
direction of the magnetic force on the wire is
(A) 8 (B) 9 (C) 7 (D) 6 (E) the
same as the electron flow
15) A
step-down transformer is used to change
(A) high
power to low power
(B) direct
current to alternating current
(C) alternating
current to direct current
(D) high
voltage to low voltage
(E) low
voltage to high voltage
USE CAPITAL
LETTERS
1)
_____ 5) _____ 9) _____ 13) _____
2)
_____ 6) _____ 10) _____ 14) _____
3)
_____ 7) _____ 11) _____ 15) _____
4)
_____ 8) _____ 12) _____
PART
B – Matching (25
marks)
10 1) Match the term on the left with the
correct phrase on the right,
|
myopia |
A |
Electrons are given an option as to the path that they take |
|
|
rarefaction |
B |
The movemnet of electrons as a result of other electrons in
proximity to them |
|
|
refraction |
C |
Changes the current an voltage in a system |
|
|
diffraction |
D |
Nearsightedness |
|
|
transformer |
E |
Change in direction of light due to optical densities |
|
|
parallel circuit |
F |
The ability of waves to move around an obstacle or through a small
opening |
|
|
electromagnetic |
G |
Area of low density particles |
|
|
induction |
H |
The creation of a rainbow effect bypassing light through a prism |
|
|
dispersion |
I |
The movement of electric charges from one position to another |
|
|
electric current |
J |
The creation of a magnetic field when electrons pass through a conductor |
|
3 2) List the three factors that affect
the strength of the magnetic field of a coil.
i)
ii)
iii)
2 3) Echoes are produced when sound is
reflected by a hard surface, such as a wall or cliff. The echoes can be heard by the human ear ONLY if the time
interval between the original sound and the reflected sound is greater than
0.1s. Why is this so?
3 4) Explain the relationship of the
permanent magnet to the current carrying coil in a speaker.
3 5) From Derek’s presentation what does
GPS stand for?
4 6) The unit of electric potential is
the VOLT. This unit is equal to a
JOULE/COULOMB. A JOULE is equal to a
NEWTON. METER. A NEWTON is
equal to a kg$m/s2. Thus a
VOLT equals a kg$m2/C$s2. Using only "kg", "m" and "s" with
appropriate exponents, determine the fundamental unit dimensions of the
following quantities.
acceleration ___________________
force ___________________
energy ___________________
power ___________________
PART
C - Problem Solving (84
marks)
Instructions: Do ANY
SEVEN (7) of the following 10 problems. All questions are of equal value (12 marks each).
1) The following is a v-t
graph of two cars, A and B. At t=0 s, A
and B pass each other.
i) Determine the acceleration of B
during the final 3 s.
3
ii) Find the distance between A and B
at t=5 s.
4
iii) Find the average velocity of A in
the first 5 s.
2
iv) Find the instantaneous acceleration
of A at t=7 s.
3
2) Todd and Keith, pretending
that they are playing in the jungle, suspend a rope from an overhead tree
limb. Keith, of mass 70 kg and running
at 7 m/s, grabs the rope and swings off the level ground. Calculate:
i) the maximum height reached by
Keith.
4
ii) how fast Todd (mass=50 kg) has to
run to reach the same height as Keith.
5
iii) the amount of work Todd does if he
climbs the 4.0 m tree in 2.5 minutes.
3
3) a) Shalonda throws a ball
vertically upward into the air with an initial velocity of 25 m/s. Calculate:
i) the time it takes the ball to
reach its maximum height.
3
ii) how high the ball will travel.
3
b) A subway train
starts from rest at a station and accelerates at the rate of 1.5 m/s2
for 15s. It runs at a constant speed
for 40 s, and then decelerates at 2.5 m/s2 until it stops at the
next station. Find the total distance
between the stations.
6
4) a) An F-4 Phantom jet
reaches a speed of 1364 km/h. If the
temperature of the air is 15oC, determine the speed of the aircraft
in terms of Mach number.
4
b) A sports car
(Corvette preferably) sounds its horn (520 Hz) as it approaches a girl by the
side of the road. She has perfect pitch
and determines that the sound from the horn has a frequency of 550 Hz. If the speed of sound that day was 340 m/s,
how fast was the sports car travelling?
5
c) The frequency
assigned to WWWW (an FM country radio station) is 106.1 MHz. If radio waves travel at the speed of light,
find the wavelength of the radio waves.
3
5) a) A closed tube 35 cm long
resonates at its shortest resonant length with a tuning fork in a room where
the air temperature is 23oC.
Calculate the frequency of the tuning fork.
6
b) An organ pipe, open
at both ends, resonates at its first resonant length with a frequency of 140
Hz. What is the length of the pipe if
the temperature in the room is 25oC?
6
6) a) Using a scale ray
diagram, locate the position of the image of a candle 2 cm high, placed 7 cm in
front of a converging lens of focal length 8 cm. Identify the four (4) properties of the image.
7
Attitude _______________ Type
_______________
Location _______________ Size
_______________
b) A lamp 18 cm
high is placed 53 cm in front of a diverging lens of focal length 43 cm. Find the image position and height
of the image using the lens and
magnification equations.
5
7) a) Locate the image in the
following diagram, given the object location as shown. Determine the image height.
4
b) A ray of light
travelling in air, strikes a piece of flint glass with an angle of incidence of
32o. Calculate the angle of refraction.
3
c) An
object 11 cm high is placed 63 cm in front of a converging lens of focal length
22 cm. Using the lens and magnification
equations, determine the image position and height.
5
8) a) Solve the circuit shown
below for the following quantities: V1,
RT, IT, I2.
6
b) Calculate the
cost of operating a 2.0 kW heater on a 240 V circuit for 15 minutes, if
electrical energy costs 104/kW$h.
3
c) The heating
element of an electric range has a resistance of 10A. Calculate the current that the appliance draws on a 240 V
circuit.
3
9) A bat flying towards a
stationary moth, emits a sound wave that reflects back to the bat in 0.1s. If
the bat is flying toward the moth at 10 m/s, how far away is the moth when the
bat receives the echo. Assume that the speed of sound is 340 m/s.
12
10) a) Using diagrams show how a
magnet can be used to induce current,
include the direction of electron flow.
4
ii)
Using diagrams show how a current carrying coil can be used to produce a
magnetic field.
4
c) State four ways
that the strength of an electromagnet can be altered.
4