Physics 217 - Homework 11 Solutions
Ruxandra Bondarescu May 8, 2005
Problem 1. Purcell 11.4
B=
2m = 0.62 gauss R3
(1)
The radius of the Earth is about R = 6 108 cm. So, from the equation above we get m = 6.7 1025 erg/gauss = 6.7 1022 J/T. If
Physics 217 - Homework 7 Solutions
Ruxandra Bondarescu April 4, 2005
Problem 1. Purcell 6.14 We set a coordinate system so the point P under consideration is in the z -x plane with coordinates (xo , 0, zo ). Consider a current loop at an angle from
Physics 217: Problem Set 6 Solutions
by Jolyon Bloomeld and Yao Liu
Due Friday, March 13th, 2009
1
Problem 6.03 Purcell
The magnetic eld along the axis of the ring is given by
B = 0 I
a2
z
2(a2 + z 2 )3/2
in SI notation where a is the radius of the ring.
Physics 217 - Homework 1 Solutions
Ruxandra Bondarescu February 1, 2005
Problem 1. Purcell 1.5 We divide the semicircle in small segments dl where each segment has a charge dq. The electric
Figure 1: We discretize the given continuos line charge de
Electricity and Magnetism
Physics 2217 and AEP 2170 Spring 2012 Homework 1 Assigned: Monday January 23th Due: Friday January 27rd (only required to hand in Problems 1-4). 1. Problem 1.1 Purcell 2. Problem 1.2 Purcell 3. Problem 1.3 Purcell 4. Finish the "
Physics 2217: Problem Set 2 Solutions
1. Purcell 1.5
dE = k
dq
r and dq = Rd
r2
So:
dq
cos x
r2
R
=k2
d cos x = 0
R0
dEx = k
Ex
Which was expected from the symmetry of the problem and:
dq
sin y
r2
2Q
R
d sin y = K
y
=k2
R0
R2
dEy = k
Ey
2. Purcell 1.9
q=
Physics 217/AEP 217 - Electricity and Magnetism Spring 2005 Problem Set #1
Due by 4 p.m. in the Physics Dept. Office, Friday February 4, 2005
Reading: Purcell, Electricity and Magnetism, Chapter 1: Problem 1: Purcell 1.5 Problem 2: Purcell 1.6 Prob
Physics 217: Problem Set 3 Solutions
by Yao Liu
Due Friday, Feb 12th, 2010
1
Purcell 2.1
Ey = 3x2 3y 2
Ex = 6xy
Ez = 0
First integrate along the straight path from (0, 0, 0) to (x1 , 0, 0)
x1
E ds =
x1
Ex (x, 0, 0)dx =
6x(0)dx = 0
0
0
since y = 0 along th
Physics 217/AEP 217 - Electricity and Magnetism Spring 2005 Problem Set #2
Due by 4 p.m. in the Physics Dept. Office, Friday February 11, 2005
Reading: Purcell, Electricity and Magnetism, Chapter 2 Problem 1: Purcell 1.30 Problem 2: Purcell 1.34 Pr
Section 2 - phys 2217
January 29, 2015
1
1.1
Continuous charge distributions
A pair of thin, charged rods
A pair of charged rods lay along the x and y axes, with charge density
(coulombs/meter), and length l, such that each of their midpoints is at the
o
Homework #3
PHYS/AEP 2217
Due at Clark 245 (AEP2217 homework box) at 5 pm on Fri. 02/26/2016
Read Chapter 2 of Purcell and Morin
1. Purcell and Morin 2.51
2. Purcell and Morin 2.53
3. Purcell and Morin 2.70
4. Purcell and Morin 2.75
5. Calculate the elect
Electricity and Magnetism
Physics 2217 and AEP 2170
Spring 2016
Personnel
Course Instructor:
Professor Chris Xu (Applied and Engineering Physics)
[email protected]
Office: Clark 276
Office Hour: Monday and Friday 11:00 12:00 pm
Section Leaders:
Jordan Emry
Physics 2217, Fall 2016
Problem Set 1
1. An equilateral triangle
due Fri, Sep 2, 2016
5. Semi-infinite wire
Purcell and Morin 1.52
A semi-infinite wire lies on the negative z axis, that is from
z = 0 to z = . It has a constant linear charge density .
~ at
Physics 2217, Fall 2016
Problem Set 2
1. Potential Energy of Cylinder
due Fri, Sep 9, 2016
5. Electric Field of Coaxial Cable
a) Review Purcell and Morin 1.24, and explain in your own
A long coaxial cable carries a uniform volume charge density
throughou
Electricity and Magnetism
Physics 2217 and AEP 2170 Spring 2012 Homework 3
Assigned: Friday February 3rd Due: Friday February 10th 1. Problem 2.1 Purcell 2. Problem 2.8 Purcell 3. Problem 2.13, 2.14, 2.15 Purcell. Note 2.13-2.15 are very short math proble
Electricity and Magnetism
Physics 2217 and AEP 2170 Spring 2012
Course Logistics
Welcome to "217", the introductory course in E&M targeted for majors in Physics and Engineering Physics. It is strongly recommended that you have taken PHYS 1116 previously.
Electricity and Magnetism
Phys 2217 / AEP 2170 Lecture 2 Lecture Notes
Cornell University !
"I would found an institution where any person can find instruction in any study." - Ezra Cornell, 1868
Craig J. Fennie
[email protected]
School of Applied and En
Electricity and Magnetism
Phys 2217 / AEP 2170 Lecture 1 Lecture Notes
Cornell University !
"I would found an institution where any person can find instruction in any study." - Ezra Cornell, 1868
Craig J. Fennie
[email protected]
School of Applied and En
Electricity and Magnetism
Physics 2217 and AEP 2170 Spring 2012 Homework 2
Assigned: Friday January 27th Due: Friday Feburary 3rd 1. 2. 3. 4. Problem 1.5 Purcell Problem 1.9 Purcell Problem 1.19 Purcell Problem 1.30 Purcell
5. (a) Three charges are situat
Homework #1
PHYS/AEP 2217
Due at Clark 245 (AEP2217 homework box) at 5 pm on Fri. 02/05/2016
Read Chapter 1 of Purcell and Morin
1. Purcell and Morin 1.35
2. Purcell and Morin 1.41
3. Purcell and Morin 1.49
4. Purcell and Morin 1.63
5. Purcell and Morin 1
Section 1 - phys 2217
January 27, 2016
1
Intro to the course
My TA oce is B11 Rock, which Ill use if you set up an appointment to see
me, but I dont spend much of my time there - feel free to drop by my research
oce 611 Space Sciences if you have a questi
PHYS2217 - Problem Set 3
Bryan Zheng (bz78)
Section 202
Feburary 26, 2016
1
Problem 1 (Purcell 2.51)
If we divide the cylinder into rings of radius a and height dx,
=
Q
2ab
dq =
=
dq
2adx
Qdx
b
R 2b +xo
Qdx
= b
b a2 +x2
2 +xo
b
1 Q
2 +xo
= 4
[ln a2 + x2
PHYS2217 - Problem Set 5
Bryan Zheng (bz78)
Section 202
March 11, 2016
1
Problem 1
The ratio of charge distributed to the small shell to the total charge is constant.
This is because the capacitances are constant and the system is at the same
1
is
potenti
PHYS2217 - Problem Set 4
Bryan Zheng (bz78)
Section 202
March 4, 2016
1
Problem 1 (Purcell 3.31)
For figure (a), negative charge will accumulate on the surface nearest to the
positive charge, and thus the innermost surface. Positive charges accumulate on
PHYS2217 - Problem Set 6
Bryan Zheng
Section 202
March 18, 2016
1
Problem 1 (Purcell 4.20)
Using a bit of dimensional analysis with our given variables, we deduce that we
must divide the charge ([C]) by the given volume ([m3 ]) and multiply by the
velocit
Section 1 - phys 2217
January 21, 2015
1
Intro to the course
Introduction to the course, explanation of the syllabus and how to get into
contact with me (My TA office is B11 Rock, which Ill use if you set up an
appointment to see me, but I dont spend much
Section 3 - phys 2217
February 5, 2015
1
Capacitors
1.1
Parallel plates
A common element of electronic circuits is the capacitor - the details of how they
are used will be taught later in this course. However, it suffices to note that
these are configurat
University of California, Berkeley
Physics H7B Spring 1999 (Strovink)
SOLUTION TO PROBLEM SET 5
Solutions by P. Pebler
1 Purcell 1.16 A sphere of radius a was lled with positive charge of uniform density . Then a
smaller sphere of radius a/2 was carved ou
Section 4 - phys 2217
February 12, 2015
1
equipotential surfaces
Theres another clever trick we can use to visualize or attempt to draw the
electric field lines - the equipotential surfaces.
Consider the electric potential V (x, y, z). The electric field
Homework #7
PHYS/AEP 2217
Due at Clark 245 (AEP2217 homework box) at 5 pm on April 4, 2016
Read Purcell and Morin 5.1 and 5.2, Chapter 6 (skip sections 6.7 and 6.8). We will skip
the relativity sections for now, and cover them at the end of the semester.