General Physics PH 213
Midterm II (Ch 28 - 32)
August 15, 2013
Name:_
Exam is closed book, closed notes. Use only your note card with 10 formulae on it.
Write all work and answers in the space provide
Seat Number
last . first I certify that the work I shall submit is my own creation, not copied from any
source, and that I shall abide by the examinafionpf'ocedures outlined below.
Signature Student I
Name Pa Student ID Number 22 l 714/
last ﬁrst
The ﬁrst two questions pertain to the situation described
below.
Two point charges are fixed in place as shown at the right.
The magnitude of each charge
NAME:
STUDENT ID NUMBER
Last, First
1[5points]Thevoltagebetweenthecathode(negativelycharged)andthescreenofa
computermonitoris12kV.Ifweassumeaspeedofzeroforanelectronasitleavesthe
cathode,whatisitsspee
Chapter 32
Optical Images
Conceptual Problems
3
True or False
(a) The virtual image formed by a concave mirror is always smaller than the
object.
(b) A concave mirror always forms a virtual image.
(c)
Charge quantization
Quarks have a smaller charge
than an electron, but they do not
occur as free particles.
Number of drops
An up quark has charge + e
A down quark has charge - e
A proton consists
Chapter 36
Atoms
Conceptual Problems
1
For the hydrogen atom, as n increases, does the spacing of adjacent
energy levels on an energy-level diagram increase or decrease?
Determine the Concept Examinat
Chapter 35
Applications of the Schrdinger Equation
Conceptual Problems
1
Sketch (a) the wave function and (b) the probability density function
for the n = 5 state of the finite square-well potential.
Chapter R
Relativity
Conceptual Problems
1
You are standing on a corner and a friend is driving past in an
automobile. Each of you is wearing a wristwatch. Both of you note the times
when the car pass
Chapter 30
Maxwells Equations and Electromagnetic Waves
Conceptual Problems
(a)
(b)
The displacement current has different units than the conduction current.
Displacement current only exists if the el
Chapter 22
The Electric Field 2: Continuous Charge
Distributions
Conceptual Problems
1
[SSM] Figure 22-37 shows an L-shaped object that has sides that are
equal in length. Positive charge is distribut
Chapter 24
Capacitance
Conceptual Problems
1
If the voltage across a parallel-plate capacitor is doubled, its
capacitance (a) doubles (b) drops by half (c) remains the same.
Determine the Concept The
Chapter 25
Electric Current and Direct-Current Circuits
Conceptual Problems
1
In our study of electrostatics, we concluded that no electric field exists
within the material of a conductor in electrost
Chapter 2
Motion in One Dimension
Conceptual Problems
1
What is the average velocity over the round trip of an object that is
launched straight up from the ground and falls straight back down to the
Chapter 4
Newtons Laws
Conceptual Problems
1
While on a very smooth level transcontinental plane flight, your coffee
cup sits motionless on your tray. Are there forces acting on the cup? If so, how do
Chapter 3
Motion in Two and Three Dimensions
Conceptual Problems
1
[SSM] Can the magnitude of the displacement of a particle be less
than the distance traveled by the particle along its path? Can its
Name_student ID_
I. [15 points] Two infinite sheets carry currents flowing parallel to the y z plane. Both
sheets have N = 150 wires per meter.
The left sheet is located at x = 0 and
the right one at
I. [25 points] Rocket-ship trip. The spacetime diagram (for an Earth-based
observer) shown in the figure shows the
worldline of a rocket-ship that is at rest
on Earth for an interval of time; then
lea
Name, student#_
I.
[25 points] Uniform B field. A uniform magnetic field of magnitude B=2 T is
applied in a region of space.
1) [5 points] A wire carrying a current I=0.7 A is introduced at 45 degrees
Coulombs Law for Point Charges:
kq q
F 12 2 r
r
kq
E 2r
r
1
k
4 o
Other Charge Distributions:
F Eq
kdq
E
r
r2
ch arg e
distribution
Line Charge
dx
E k 2 r
r
ch arg e
distribution
Surface Charge
d
Coulombs Law for Point Charges:
kq q
F 12 2 r
r
kq
E 2r
r
kq q
U 1 2
r
kq
V
r
Potential Energy and Potential:
Wab U
U
q
Wab qVab q (Vb Va )
Gauss Law and other Charge Distributions:
F Eq
kdq
E
r
Name
Student ID
last
Score
first
V. [20 points total] A W-shaped glass tube is partially filled with water, as
shown at right. The tube is at rest on a flat, level table, and both ends
are exposed to
Puzzle 1: The Traces
able Puzzle Challenge
Puzzle #2: The Traces
Spr
by Jonah Ostroff
Here are some mysterious equations.
2(z 2
A:
y)(x + 1) = 1
Multivariable Puzzle Challenge
Spring 2016
Puzzle #2: T
PHYS 122 AB Spring 2012 NAME
MIDTERM 1 Last First
April 12th 2012 Student#
PART I Multiple Choice Each question is worth 5 points total 55 points
1. A positively charged rod is brought nearone side of
Fundamental law of
Electrostatics
Coulomb Law: (Solution to DE) Force between two
point charges:
kq
~ =
E
r2
r
or
Gauss Law: (DE) Relationship between charge of E field
I
Integral Equation:
~ = Qinsid
Name _Student ID _ Score_
last
first
Part I [43 points]. Answer on your scantron sheet.
For the next two questions, consider the charge
configuration shown to the right: Two equal and opposite
charges