AAPT Quiz
2000 Physics Quiz Bowl (Part 1)
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1. As a wave moves from one medium to a second medium with a different index of refraction which of the following wave properties would NEVER change?
frequency
wavelength
speed
angle
all will change
2. The following equation is an example of what kind of nuclear reaction?
fission
fusion
alpha decay
beta decay
positron decay
3. Which of the following statements is NOT true concerning the simple circuit shown where resistors R
1
, R
2
and R
3
are have equal resistances?
the largest current will pass through R
1
the voltage across R
2
is 5 volts
the power dissipated in R
3
could be 10 watts
if R
2
were to burn out, current would still flow through both R
1
and R
3
the net resistance of the circuit is less than R
1
4. Specular reflection occurs whenever light is incident on
a smooth surface
a rough surface
a boundary between high index of refraction and low index of refraction materials
a boundary between low index of refraction and high index of refraction materials
a boundary between any two transparent substances, regardless of index of refraction
5. A cart with mass
2m
has a velocity
v
before it strikes another cart of mass
3m
at rest. The two carts couple and move off together with a velocity
v/5
2v/5
3v/5
2v/3
(2/5)
0.5
v
6. How much work would be required to move a 4 coulomb charge 6 meters parallel to a 24 N/C electric field?
0 J
24 J
96 J
144 J
576 J
7. The length of the most effective transmitting antenna is equal to one-fourth the wavelength of the broadcast wave. If a radio station has an antenna 4.5 meters long then what is the broadcast frequency of the radio station?
1.5 x 10
-8
Hz
6.0 x 10
-8
Hz
1.7 x 10
7
Hz
6.7 x 10
7
Hz
3.0 x 10
8
Hz
8. A pendulum is pulled to one side and released. It swings freely to the opposite side and stops. Which of the following might best represent graphs of kinetic energy (E
k
), potential energy (E
p
) and total energy (E
T
)?
A
B
C
D
E
9. Is it possible for an object's velocity to increase while its acceleration decreases?
No, this is impossible because of the way in which acceleration is defined.
No, because if acceleration is decreasing the object will be slowing down.
No, because velocity and acceleration must always be in the same direction.
Yes, an example would be a falling object near the surface of the moon.
Yes, an example would be a falling object in the presence of air resistance.
10. When a wire moving through a magnetic field has a voltage induced between the wire's ends, that voltage is
directly proportional to the strength of the magnetic field
directly proportional to the velocity of the wire
directly proportional to the diameter of the wire
i only
ii only
iii only
i and ii only
ii and iii only
11. A certain particle undergoes erratic motion. At every point in its motion, the direction of the particle's momentum is ALWAYS
the same as the direction of its velocity
the same as the direction of its acceleration
the same as the direction of its net force
the same as the direction of its kinetic energy vector
none of the above
12. Astronauts in an orbiting space shuttle are "weightless" because
of their extreme distance from the earth
the net gravitational force on them is zero
there is no atmosphere in space
the space shuttle does not rotate
they are in a state of freefall
13. An object near the surface of the earth with a weight of 100 newtons is accelerated at 4 m/s
2
. What is the net force on the object?
25 N
40 N
250 N
400 N
2500 N
14. A beam of light passes from medium 1 to medium 2 to medium 3 as shown in the diagram below.
What may be concluded about the three indexes of retraction, n
1
, n
2
and n
3
?
n
3
> n
1
> n
2
n
1
> n
2
> n
3
n
1
> n
3
> n
2
n
2
> n
3
> n
1
n
2
> n
1
>n
3
15. A student initially at rest on a frictionless frozen pond throws a 1 kg hammer in one direction. After the throw the hammer moves off in one direction while the student moves off in the other direction. Which of the following correctly describes the above situation?
The hammer will have the momentum with the greater magnitude.
The student will have the momentum with the greater magnitude.
The hammer will have the greater kinetic energy
The student will have the greater kinetic energy.
The student and the hammer will have equal but opposite amounts of kinetic energy.
16. Consider an illuminated object, a pinhole, and a screen arranged to form a pinhole image on the screen. Which of the following will occur if the screen is moved away from the pinhole?
the image will go out of focus
the image will become larger
the image will become brighter
i only
ii only
iii only
i and iii only
ii and iii only
17. An alpha particle and a proton are placed equal distance between two large charged metal plates as shown.
Which of the following would best describe the motion of the two particles if they were free to move?
The alpha particle will travel upwards with twice the velocity of the proton.
Both particles will travel upwards with the same velocity.
The alpha particle will accelerate upwards with twice the acceleration of the proton.
Both particles will accelerate upwards with the same acceleration.
The alpha particle will accelerate upwards with half the acceleration of the proton.
18. Two parallel metal plates carry opposite electrical charges each with a magnitude of
Q
. The plates are separated by a distance
d
and each plate has an area
A
. Consider the following:
increasing Q
increasing d
increasing A
Which of the following would have the effect of reducing the potential difference between the plates?
i only
ii only
iii only
i and iii
ii and iii
19. An astronaut in an orbiting spacecraft attaches a mass
m
to a string and whirls it around in uniform circular motion. The radius of the circle is
r
, the speed of the mass is
v
, and the tension in the string is
F
. If the mass, radius, and speed were all to double the tension required to maintain uniform circular motion would be
F/2
F
2F
4F
8F
20. A wire moves with a velocity
v
through a magnetic field and experiences an induced charge separation as shown.
What is the direction of the magnetic field?
into the page
towards the bottom of the page
towards the right
out of the page
towards the top of the page
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