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HSC Physics 2019
HSC Physics 2019
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General revision for HSC Physics Modules 5 - 7
Flashcards
37 cards
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Practice quiz
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Questions
37
Answers
1
In circular motion the acceleration vector is ______ to the velocity vector
parallel
the same
tangent
perpendicular
2
The peak on a blackbody curve from a main sequence stars tells you
Colour of stars
Temperature
All of the above
Luminosity
3
Calculate the velocity of the electrons as they reach the anode.
6 x 107 ms-1
4 x 107 ms-1
8 x 107 ms-1
2 x 107 ms-1
4
What is the optimal angle of release for maximum vertical distance?
60 degrees
45 degrees
30 degrees
90 degrees
5
Reflection, refraction or diffraction...?
Refraction
Diffraction
None of the above
Reflection
6
Two ideal transformers connected with an ammeter. What is the reading on the ammeter?
0.50 A
2.5 A
1.0 A
0.25 A
7
According to Kepler, a planet orbits fastest at __________.
Perihelion (point closest to Sun)
Circular motion
Aphelion (point farthest from Sun)
The speed is always equal
8
Lenz's law is a direct application of...
The conservation of mass
The conservation of momentum
The conservation of impulse
The conservation of energy
9
Do we observe time dilation on Earth?
No, time is only slowed down at extreme velocities
Yes, it is just too small to easily observe
No, time is the same for everything
No, time is only dilated by extreme gravitational fields
10
A satellite is moved from a higher to lower orbit. How does the kinetic energy change?
It stays the same
It decreases
It increases
It depends on the mass of the satellite
11
Calculate the acceleration of the electrons as they leave the cathode. Note: q
e
= 1.602 x 10
-19
C, m
e
= 9.109 x 10
-31
kg
4 x 1016 ms-2
4 x 1012 ms-2
4 x 1014 ms-2
4 x 1010 ms-2
12
Determine the direction of the current in the loop.
Anticlockwise
Clockwise
No current because the magnetic field is not changing
No current because the magnetic flux is not changing
13
Which of the following is
not
in Galileo's analysis of projectile motion?
Horizontal and vertical components act independently
The shape of the trajectory is parabolic
It can be broken down into two perpendicular components
Projectile motion occurs in inertial and non-inertial frames of reference
14
Which force allows this object to undergo uniform circular motion?
Net Force (i.e. Fnet = Fweight + Ftension)
Tension
No force is needed because the speed is constant.
Weight
15
What is the official language of the country where the CERN Laboratory headquarters is located?
Italian
French
German
Romansh
16
In the photoelectric effect shown below the photon energy would be:
8 eV
0 eV
3 eV
8 J
17
What is the name of this Transformer?
Bumblebee
Megatron
Grimlock
Optimus Prime
18
Reflection, refraction or diffraction..?
Refraction
Reflection
Diffraction
None of the above
19
The diffraction of light does
NOT
depend on the
speed of the light.
wavelength of the light.
frequency of the light.
size of the slit.
20
Which of the following is
not
correct about Einstein's theory of special relativity?
The laws of physics are invariant in all non-inertial reference frames
It cannot be used to calculate the motion of accelerating objects
The speed of light is the same for all observers in all reference frames
Space and time are not separate
21
Which of the following did Maxwell's equations
not
contribute to physics?
Prediction of electromagnetic waves
Prediction of the velocity of light
Unification of electricy and magnetism
Prediction of the aether
22
Which of the following best describes Kepler's Third Law?
T2 x r3 is a universal constant
It shows that all planets orbit with the same time period
r3/T2 is constant for all planets in the same system
r3/T2 is constant for all planets
23
A satellite is moved from a higher to lower orbit. How does the potential energy change?
It decreases
It increases
It stays the same
It depends on the mass of the satellite
24
Projectile motion question:
27.7
19.6
1.5u
u
25
Why were the three Defenestrations of Prague (in the years 1419, 1483 and 1618) so named?
Windows were smashed throughout the city
People were thrown out the window
Stained-glass windows of the cathedral were stolen
Windows in the city were prohibited by law
26
In circular motion the velocity vector is ______ to the path of motion
tangent
perpendicular
parallel
the same
27
Which of the following is the closest approximation of blackbody?
White objects
Dull, black objects
Shiny objects
Wet objects
28
What is the work function in the photoelectric effect?
The current produced by a metal
The minimum energy required to liberate electrons from the metal
The minimum frequency of light required to emit electrons
The maximum energy required to liberate electrons.
29
Which two Italian city-states fought over a wooden bucket in 1325?
Genoa and Milan
Florence and Siena
Venice and Verona
Bologna and Modena
30
See the figure below:
The current in Rod A
The length of the rods
The distance between the two rods
The mass recorded on the balance scale
31
What is the optimal angle of release for maximum horizontal distance?
60 degrees
30 degrees
90 degrees
45 degrees
32
What of the following is the correct form of Malus' Law?
I = I0 sin2 θ
I = I0 cos2 θ
I = I0 cos θ
I = I0 sinθ
33
DC motors and generators contain a ...
split-ring commutator.
slip ring commutators.
34
How many years did the Hundred Years War last?
100
It is still ongoing
97
116
35
A wire is perpendicular to a magnetic field. If the force is to remain constant, which I vs. B graph is correct?
C
B
D
A
36
In the photoelectric effect, which of the following depends on the metal used?
Just the threshold frequency
Threshold frequency and work function
Just the work function
The intensity of light needed to produce photoelectrons
37
What is the role of a transformer at a power station?
To increase heating in the transmission lines by stepping up current
To reduce heating in the transmission lines by stepping up the current
To reduce heating in the transmission lines by stepping up the voltage
To increase heating in the transmission lines by stepping up the voltage
