Download Physics 2424 Final - Tarleton State University

Physics 2424 Final
Part A - Fall 2000
Name : _________________________________________________
Instructions:
1.
You are allowed no notes on Part A. You will be allowed a single sheet of notes
on Part B.
2.
Upon completion, you should turn in Part A and pickup Part B from your
instructor.
3.
If you have any questions about the meaning or wording of a problem, you should
ask your instructor.
4.
Good Luck.
I.
Matching
__________________________
(50 pts)
II.
Formulas
__________________________
(20 pts)
III.
Matching
_________________________
(40 pts)
IV.
Maxwell's Eqtns
V.
Drawings
___________________
__________________________
(20 pts)
(15 pts)
VI.
Units
__________________________
(10 pts)
____________________________________________________________________
TOTAL PART A
_________________________
(155pts)
TOTAL PART B
_________________________
(150 pts)
BONUS
_________________________
(30 pts)
____________________________________________________________________
TOTAL SCORE & GRADE ______________________
I.
Matching (2 pts each)
A. Leonardo De Vinci
B. Diffraction
C. Benjamin Franklin
D. Refraction
E. Interference
F. Reflection
G. James Clerk Maxwell
H. Rene' Descart
I. Speed of Sound
J. H.A. Lorentz
K. Thomas Young
L. Index of Refraction
M. Michael Faraday
N. Isaac Newton
O. Galileo Gallile
P. Albert Michaelson
Q. Linear Momentum
R. Ray
S. Wilbred Snell
T. Albert Einstein
U. Dispersion
V. Polarization
W. Dr. McCoy
X. Joseph Henry
Y. Speed of Light
Z. Karl Gauss
AA. George S. Ohm
BB. Andre'-Marie Ampere
CC. Charles Coulomb
DD. dielectric
EE. Nikoli Tesla
FF. Hans Oersted
GG. Heinrich Hertz
______1.
This great physicist championed the corpuscular theory of light, developed the
reflecting telescope, and invented Calculus.
______ 2.
This English physicist developed the law describing how light waves bend when
passing between two different media.
______ 3.
This great physicist contributed to the field of electrostatics including the
convention for designation the two types of charge as "positive" and "negative."
In later life, he used his fame as a scientist to act as a diplomat in his country's
fight for freedom.
______ 4.
A graduate of the U.S. Naval Academy, he became the first American physicist to
win the noble prize for his work with light.
_____ 5.
His 1905 Ph.D. thesis work on Browning motion finally proved to the scientific
community the existence of atoms but it was his other work on the photoelectric
effect that won him the Nobel Prize. He is also famous for relativity.
_____ 6.
This physicist proved that an electric current could produce a magnetic field
during a public lecture. Consequently, the American Association of Physics
Teachers award for excellence in classroom teaching is named in his honor.
_____ 7.
When placed between two plates of a capacitor, it can increase a capacitor's
charge storing capacity.
_____ 8.
He developed the law of inertia, invented the compound microscope as well as
being the first person to make extensive use of the reflecting telescope.
_____ 9.
This vector perpendicular to a wave front can be used to draw diagrams instead of
using the mathematics to simplify problems in optics where no small apertures
exist.
_____ 10.
He developed the first law of falling bodies as well as the law of sliding friction.
_____ 11.
In addition to developing the laws of electromagnetism in the 1860's, he also
made important contribution in statistical mechanics and in describing the rings of
Saturn.
_____ 12.
This effect is the experimental evidence proving wave behavior.
_____ 13.
He developed the concept of conservation of linear momentum. In France, the
law governing the bending of light as it enters a different medium is named after
this scientist.
_____ 14.
Although he died at the early age of 36, this great scientists left his mark by being
the first to produce radio waves. For this accomplishment, the unit of frequency is
named in his honor.
_____ 15.
This quantity denoted by the symbol c is of fundamental importance to the field of
physics as it links the study of electricity and magnetism together and plays an
important role in Einstein's Theory of Special Relativity.
_____ 16.
It is the bending of light as it passes between two different media.
_____ 17.
It is the bending of light around a corner or other obstacle.
_____ 18.
A former employee of Edison, this scientist championed the cause of alternating
current and performed experiments involving magnetic fields.
_____ 19.
He was the first director of the Smithsonian. In honor of his discovery of selfinductance, the unit of inductance was named after him
_____ 20.
The property of a wave that is demonstrated when light strikes a mirror.
_____ 21.
After working with this property of light on his Masters in Physics at Harvard,
Land decided to start a camera company in Rochester, NY. He named his
company in honor of this property.
_____ 22.
This light effect is the cause of chromatic aberration in lenses and rainbows.
_____ 23.
This parameter of a material is defined as the ratio of the speed of light in vacuum
to the speed of light in the material.
_____ 24.
He measured the voltage dropped across various materials as a function of current
and discovered that for some materials the I-V graph is a straight line. These
materials and the unit of resistance are named after him.
_____ 25.
This intrepid physicist is a graduate of Baylor University and the chairman of the
famous physics and mathematics department at Tarleton State University.
II.
Write the Formulas (4 pts each)
1.
Lorentz Force Law
_______________________________________________
2.
Ampere's law
_______________________________________________
3.
Formula Defining Electric Potential Difference
_________________________________________________________________
4.
Coulomb's Law
_______________________________________________
5.
Ohm's Law
_______________________________________________
III.
Multiple Choice (5 pts each) - Circle the best choice for each problem
1.
Austin and Cindy have a small model train set that requires 24 volt AC power to
run. Since they are poor TSU students who can't afford the $25.00 transformer
required to convert the 110 volt/ 20 Amp AC wall power, they decide to build one
themselves. If Austin makes the primary by wrapping 220 turns of wire,
approximately how many turns of wire must Cindy use in making the secondary?
2.
3.
a)
48
b)
445
c)
220
d)
None of the above
When the reflection of an object is seen in a plane mirror, the image is:
a)
real and upright.
b)
real and inverted.
c)
virtual and upright.
d)
virtual and inverted.
Which of the following describes what will happen to a light ray incident on an
air-to-glass boundary at less than the critical angle?
a)
total reflection
b)
total transmission
c)
partial reflection, partial transmission
d)
partial reflection, total transmission
4.
5.
6.
How is the direction of propagation of an electromagnetic wave oriented relative
to the associated E and B fields?
a)
parallel to both E and B
b)
perpendicular to both E and B
c)
parallel to E, perpendicular to B
d)
parallel to B, perpendicular E
Which condition of motion must be met with regard to a charged particle if it is in
the process of emitting electromagnetic radiation?
a)
moves at constant velocity
b)
accelerates
c)
moves at the speed of light
d)
moves parallel to a uniform magnetic field
Resonance occurs in an AC series circuit when which of the following conditions
is met?
a)
resistance equals capacitive reactance
b)
resistance equals inductive reactance
c)
capacitive reactance equals zero
d)
capacitive reactance equals inductive reactance
7.
8.
The wavelength of an electromagnetic wave of frequency 1.0x1014 Hz is
a)
3.0 m
b)
1.0 nm
d)
1.0 km
e)
None of these.
c)
3.0 mm
In the circuit shown below, the switch is closed. Which of the following
statements best describes the voltage across the resistor as measured by the DC
voltmeter immediately after the switch is closed?
Switch
R

+
DC
Meter
-
a)
Zero because there is no battery in that part of the circuit
b)
Negative
c)
Positive
d)
Zero because of Lenz's Law
VI.
Maxwell's Equations
Write Maxwell's Equations for Free Space (Vacuum) in differential form
1.
Gauss' Law of Electrostatics
2.
Gauss' Law of Magnetism
3.
Faraday's Law of Magnetic Induction
4.
Ampere-Maxwell's Equation
V.
Drawings
(5 pts each)
1.
Draw the magnetic field lines for the perfect toroid whose cross sectional view is
shown below:
2.
Draw the direction of the current flowing through the loop to produce the
magnetic field lines shown in the diagram.
3.
Draw the electric field lines for the following charge distribution
+1 nC
-3 nC
VI.
Units (1 pt each)
1.
Force
_____________________________________
2.
Magnetic Field
_____________________________________
3.
Charge
______________________________________
4.
Electric Field
_____________________________________
5.
Index of Refraction
_____________________________________
6.
Capacitance
____________________________________________
7.
Reactance
____________________________________________
8.
Inductance
____________________________________________
9.
Electromotive Force ______________________________________
10.
Torque
____________________________________________