PHYS 2112
Chapter 42 Solutions
Chapter 42 Homework
Objective Questions
7.
SOLUTION:
(e) No two electrons in an atom can have the same set of quantum numbers.
42.3 Bohrs Model of the Hydrogen Atom
13.
SOLUTION:
(a) The radii of Bohr orbits in hydrogen are
Chapter 25 Homework
Objective Questions
9.
SOLUTION:
We recall the general equation
U = ke
q1 q2
r12
which is used to nd the Potential energy due to many point charbes. We can use this formula to
help use deduce in what we we should rank gures a, b, c, an
Chapter 24 Homework
Objective Questions
6.
SOLUTION:
(a) If a cubical gaussian surface is begin bisected by a large sheet of charge, parallel to it top and
s
bottom faces, we know that the angle between these 2 faces and the direction of the electric eld
Chapter 23 Homework
Objective Questions
2.
SOLUTION:
Given that r = 5.29 1011 m and e = 1.09 1019 C we can see that the magnitude of the electric
eld E is
E = ke
e
N m2
= 8.99 109
r2
C2
1.60 1019 C
(5.29 (1011 ) m)2
= 5. 140 1 1011 N/ C 1012 N/ C
so we ca
Physics 2212
Mini-Test II Review
Mini-Test II Preparation
Some Important Equations Worth Memorizing
Chapter 29:
1. If a charged particle moves in a uniform magnetic eld so that its initial velocity is perpendicular to the
eld, the particle moves in a circ
PHYS 2212
FINAL EXAM REVIEW
Final Exam Review
23 Electric Fields
23.1 Electric Fields and Electric Field Lines
23.1.1 Denition of an Electric Field
An electric eld is said to exist in the region of space around a charged object, the source charge.
When an
PHYS 2212
EXAM II REVIEW
Exam II Review
Chapter 34 Electromagnetic Waves
34.1 Basic Sinusoidal Wave
Frequency
Wavelength
Wave speed
Period
f
Wave Vector
Wave Equation
Index of Refraction
Angular Frequency
= c=f
v= f
T = 1=f
k=2 =
A sin (kx ! t)
c
n= v
! =
Electric Field Distributions and Electric Potentials
Electric Field Distributions and Electric Potentials
Working Problems
(a) Find the electic potential at a distance z above the origin of a ring of positive charge Q
We draw the gure of a uniformly charg
Physics 2212 - Sample Final Exam
Fall 2016
Date: _
PROFESSOR BEHNAM R.ARYAFAR
TIME 120 MIN
Name_
75 (On the actual final) Multiple Choice Problems X 2 Points = 150 Points.
READ THE THE INSTRUCTION COMPLETELY BEFORE START WORKING ON TEST.
You should have o
Chapter 27 Homework
Objective Questions
6.
SOLUTION:
(i) We have been told that RA = 3RB and we are aksed to nd the ratio
AA
:
AB
To show this, we recall the equation
L
A
R=
and dene, for wire A
RA =
L
AA
RB =
L
:
AB
AA =
L
RA
(1)
AB =
L
RB
(2)
and for wi
Chapter 28 Homework
Objective Questions
3.
SOLUTION:
(c) the current in each resistor is the same.
7.
SOLUTION:
Given that each of the ve resistors has a resistance of R, and each of the capacitors has a capacitance of C,
the time constant is given as
=
Chapter 29 Homework
Objective Questions
9.
SOLUTION:
By the right hand rule we can conlcude that (c) is the correct answer.
12.
SOLUTION:
We can begin this exercies by rst noting the fact that inorder for an object to levitate, there must be some
force th
PHYS 2112
Chapter 41 Solutions
Chapter 41 Homework
41.2 Analysis Model: Quantum Particle Under Boundry Conditions
7.
SOLUTION:
(a) To draw an energy level diagram of an electron contained in a 1 dimensional box of length L = 0.100 nm
it may be useful to r
PHYS 2112
Chapter 40 Solutions
Chapter 40 Homework
Objective Questions
12.
SOLUTION:
We can use the fact that the charge experiences the same change in potential which means thier change in
kinetic energy will be the same, In other words
q V = K
for both
PHYS 2112
Chapter 39 Solutions
Chapter 39 Homework
Objective Questions
8
SOLUTION:
We begin by recalling that the energy-momentum relationship for a relativistic particle is
E 2 = p2 c2 + mc2
2
where E is the total energy, p is the particles momentum, and
PHYS 2112
Chapter 38 Solutions
Chapter 38 Homework
Conceptual Questions
1.
SOLUTION:
The slits that sounds might pass though (for example, a doorway) are on the order of 1 meter, and the
wavelengths of sound are on the order of mm 1 m: Therefore the sound
PHYS 2112
Chapter 37 Solutions
Chapter 37 Homework
Conceptual Questions
6.
SOLUTION:
(a) Becasue monochromatic sources are of a single wavelength and if we had various wavelength, each would
bend at dierent angles.
(b) There would be a continuous spectrum
PHYS 2212
Chapter 36 Solutions
Chapter 36 Homework
Objective Questions
9.
SOLUTION:
We image a light ray refracting at the surface of the water (which originated at the sh), and we know that
since the index of refraction of water is greater than that of a
PHYS 2212
Chapter 35 Solutions
Chapter 35 Homework
Objective Questions
3.
SOLUTION:
We suppose that the critical angle c is dened as
c = arcsin
n2
n1
Numberially, this gives us
c = arcsin
1.52
1.63
= 68. 8 .
Conceptual Questions
7.
SOLUTION:
If the parasc
PHYS 2212
Chapter 34 Solutions
Chapter 34 Homework
Objective Questions
3.
SOLUTION:
Given that f = 2.45 109 Hz we need to nd the wave length . To do so, we will begin by recalling the
relation
c
=
f
m
where c = 3.00 108 . Numberically we have
s
m
s = 0.12
PHYS 2212
Chapter 33 Solutions
Chapter 33 Homework
Section 33.2: Resistors in a AC Circuit
7.
SOLUTION:
We know that the general formula for the average power delivered to a resistor of resistance R is
2
P avg = Irm s R
and since we want to nd the average
PHYS 2212
Chapter 32 Solutions
Chapter 32 Homework
Section 32.1: Self-Induction and Inductance
9.
SOLUTION:
(a) We recall that the magnitude of the induced emf is dened as
|L | = L
dI
dt
and if I = t2 6t then we can see that
|L | = L
d2
t 6t = L (2t 6) .
PHYS 2212
Chapter 31 Solutions
Chapter 31 Homework
Objective Questions
7.
SOLUTION:
We know from Lenzs law that when a magnet is brought toward a conducting loop, there we be a current
which is induced in the conducting loop in a direction which opposes t
PHYS 2212
Chapter 30 Solutions
Chapter 30 Homework
Objective Questions
4.
SOLUTION:
We consider two wires with a identical current owing though each in the same direction. We can use the
right hand rule to help us visualize the direction of the magnetic e