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Which of the following wave properties cannot be
demonstrated by all kinds of waves? Polarization
Diffraction
Superposition
Refraction
Frequency |
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A source when at rest in a medium produces waves
with a velocity v and a wavelength of l. If the source is set
in motion to the left with a velocity vs what would be the length of the
wavelengths produced directly in front of the source? |
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A beam of light strikes one
mirror of a pair of right angle mirrors at an angle of incidence of 45o as
shown in the diagram.
If the right angle mirror assembly is rotated such
that the angle of incidence is now 60o, what will happen to the angle of the
beam that emerges from the right angle mirror assembly?
It will move through an
angle of 15o with respect to the original emerging beam.
It will move
through an angle of 30o with respect to the original emerging beam.
It will move
through an angle of 45o with respect to the original emerging beam.
It will move
through an angle of 60o with respect to the original emerging beam.
It will emerge
parallel to the original emerging beam. |
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What would be the total current being supplied
by the battery in the circuit shown? 3.0
amperes
2.25
amperes
2.0
amperes
1.5
amperes
1.0
amperes |
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Consider a simple circuit containing a battery
and three light bulbs. Bulb A is wired in parallel with bulb B and this combination is
wired in series with bulb C. What would happen to the brightness of the other two bulbs if
bulb A were to burn out? only bulb B would get
brighter.
both would get
brighter.
bulb B would get
brighter and bulb C would get dimmer.
bulb B would get
dimmer and bulb C would get brighter.
There would be
no change in the brightness of either bulb B or bulb C. |
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A coil of wire is moved vertically at a constant
velocity through a horizontal magnetic field. Assume the plane of the coil is
perpendicular to the magnetic field. Which of the following graphs would best represent
the electric current induced in the coil if it started somewhat above the magnetic field
and ended equally as far below the magnetic field? |
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Three metal spheres A, B, and C are mounted on
insulating stands. The spheres are touching one another, as shown in the diagram. A strong
positively charged object is brought near sphere A and a strong negative charge is brought
near sphere C. While the charged objects remain near spheres A and C, sphere B is removed
by means of its insulating stand. After the charged objects are removed, sphere B is first
touched to sphere A and then to sphere C. The resulting charge on B would be: the same sign but ½
the magnitude as originally on sphere A.
the opposite
sign but ½ the magnitude as originally on sphere A.
the opposite
sign but ¼ the magnitude as originally on sphere A.
the same sign
but ½ the magnitude as originally on sphere C.
neutrally
charged. |
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Which of the following graphs would best
represent the electric field of a hollow Van de Graff sphere as a function of distance
from its center when it is charged to a potential of 400,000 volts? |
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A mass spectrograph separates ions by weight
using simple concepts from physics. Charged ions are given a specific kinetic energy by
accelerating them through a potential difference. The ions then move through a
perpendicular magnetic field where they are deflected into circular paths with differing
radii. How would the radius of a singularly ionized common helium atom 42He+1
compare to the radius of a doubly ionized common oxygen atom 168O+2
if they were accelerated through the same potential difference and were deflected by the
same magnetic field? The radius of the He
ion path is 4 times the radius of the 0 ion path.
The radius of
the 0 ion path is 2 times the radius of the He ion path.
The radius of
the 0 ion path is 4 times the radius of the He ion path.
The radius of
the 0 ion path is 8 times the radius of the 0 ion path
The radius of
the He ion path is equal to the radius of the 0 ion path. |
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A bar magnet is thrust into a coil of wire as
indicated in the diagram below. Which of the following statements concerning this experiment is correct?
The polarity of the
coil at H is North, at G is South, and the induced current is indicated by arrow X.
The polarity of
the coil at H is South, at G is North, and the induced current is indicated by arrow Y.
The polarity of
the coil at H is North, at G is South, and the induced current is indicated by arrow Y.
The polarity of
the coil at H is South, at G is North, and the induced current is indicated by arrow X.
There is no
polarity to the coil and no current in the coil. |
