# What is Purcell: Definition and 38 Discussions

Henry Purcell (; c. 10 September 1659 – 21 November 1695) was an English composer. Although he incorporated Italian and French stylistic elements, Purcell's was a uniquely English form of Baroque music. He is generally considered to be one of the greatest English composers; no later native-born English composer approached his fame until Edward Elgar, Ralph Vaughan Williams, Gustav Holst, William Walton and Benjamin Britten in the 20th century.

View More On Wikipedia.org
1. ### How much SR is needed for Purcell and Morin?

TL;DR Summary: How much special relativity Is needed for Edward M. Purcell & David J. Morin It clearly is needed to fully understand this book and I have what seems like a good book that introduces relativity (A.P. French) But I am not wanting to start it yet and it’s around 300 pages long...
2. ### Advancing to Higher Level Electromagnetism: Is Purcell & Morin the Solution?

Hi I am coming up to the end of first year electromagnetism using the book University Physics. I will be honest there’s a lot of information crammed into a few hundred pages and it was my first ever exposure to EM. I never did it in school. I feel like its give me a good overview but i don't...
3. ### Intro Physics Is there a freshman dedicated EM book other than Purcell?

Is there a freshman dedicated EM book other than Purcell? I am not interested in the standard combo texts or Feynman.
4. ### Purcell EM Problem 1.2: Theory Behind Numerical Solution?

The author start of with $\frac{1}{(y+\sqrt{3})^2} - 2 \cdot \frac{1}{1 + y^2} \left( \frac{y}{\sqrt{1+y^2}} \right) = 0$ and arrives at the equation $y = \frac{(1+y^2)^{3/2}}{2(y+\sqrt{3})^2}$ The solution is merely by iterating (use an initial guess value of y, calculate the RHS, then use this...
5. ### Will using Griffith and Purcell benefit a beginner in E&M?

Hello, I've been researching textbooks to use for my first-year E&M course and since I have no previous knowledge of E&M, I've been reading University Physics by Young et al. and Serway's book. I am pretty annoyed at the verbosity of the texts and the banal exercises where most exercises are...
6. ### Quantum QED textbook that covers QED cavity and Purcell effect

Dear all, I am looking for an introductory QED textbook (or quantum optics if not) that also covers QED cavity and Purcell effect in one of its chapters. I am not planning to extensively understand every single detail about QED cavity and Purcell effect since I am not a physicist and I don't...
7. ### Classical Purcell E&M recommendation?

I have already taken the following online courses: - Physics 1 (calc based, mechanics) - Linear Algebra - Calculus 1 - Calculus 2 - Electronics technician by trade Next semester I will be taking multi variable calculus, in preparation for a brick and mortar Canadian university for fall of 2018...
8. ### Electrodynamics: Comparing Purcell & Griffiths Textbooks

Hi, I've 2 em texts: Purcell, ( Electricity&magnetism ) and the Griffiths (intro to electrod.) On which of the two, is best to study ?
9. ### Field along vertical axis to hemispherical shell

Homework Statement A hemispherical shell has radius ##R## and uniform charge density ##\sigma##. FInd the electric field at a point on the symmetry axis, at position ##z## relative to the center, for any ##z## value from ##-\infty## to ##\infty##. The Attempt at a Solution Let ##\theta## be...
10. ### I The Electric field of a moving charge according to Purcell

In Berkeley Physics Course (Volume II) on Electricity and Magnetism: https://www.scribd.com/doc/128728926/Electricity-and-Magnetism-Berkeley-Physics-Course-Purcell ...Purcell discusses the invariance of charge (Section 5.4), the electric field measured in different frames of reference (Section...
11. ### Why would a magnetic monopol's field be 1/r^2?

Hi, I was reading Purcell's Electricity and Magnetism. It says that if there were a magnetic charge, its field would behave like an electric charge (field pointing out radially and magnitude decreasing as 1/r^2). Why? Could this be deduced from magnetic fields produced by electric charges? If...
12. ### Classical Purcell to Jackson: Is Griffith's Electrodynamics a Good Next Step?

I heard that Griffith's Electrodynamics is at a similar level of Purcell's book on electricity; is it fine if someone goes into a graduate level electrodynamics book right after Purcell?
13. ### Image Charges Purcell Discussion

Hi everyone, I have a question (or three) regarding Purcell's discussion of image charges, in pg 137-139 of the third edition of his EM book. He goes over the classic image charge example: a plane held at zero potential, and a charge Q a distance h above it. I'm fine with everything he...
14. ### Intro Physics How does KIP Fundamentals of Electricity compare to Purcell?

How does KIP: Fundamentals of Electricity and Magnetism compare against Purcell? Are they at the same level? Or would focusing on Purcell be a better option? I took an honors EM class and are assigned text was Purcell. It was the first time our school used Purcell for an honors sequence...
15. ### Question about Purcell - Electricity and Magnetism

In chapter 5 of Purcell's Electricity and Magnetism, he shows using principles of special relatives that the magnetic force of a current carrying wire on a moving charge is equivalent to the charge experiencing an electric force in its own frame of reference. His argument is that when the...
16. ### I What Purcell actually said

Since the advent of relativity in 1905, physicists have understood electromagnetism as the first example of a unified field theory. However, the relativistic insight is often ignored in freshman physics classes, so that students learn the subject as it was understood in the 19th century. An...
17. ### Conductor in a capacitor problen (E&M)

1. The question: This question is from purcell's E&M book (3.71). (a) The plates of a capacitor have are A and separation s (assumed to be small). The plates are isolated, so the charges on them remain constant, the charge densities are +-σ. A neutral conducting slab with the same area A but...
18. ### Purcell, Chapter 2 Problems

These are more mathematics than they are problems with understanding of physics. 1. Homework Statement The problems are 2.18 and 2.12 which are as follows, 2.18A hollow circular cylinder, of radius a, and length b, with open ends, has a total charge Q uniformly distributed over its surface...
19. ### Krane vs Kleppner & Purcell

I know that Kleppner and Purcell are deeper, but does HRK even come close? Also how far is HRK from HRW in depth of coverage and difficulty? Thanks!
20. ### What to do after Kleppner and Purcell?

What would be a good mechanics book after K&K that includes Lagrangian and Hamiltonian mechanics? Also, would Griffiths' Electrodynamics be suitable after Purcell? What about Griffiths' Quantum Mechanics (ignoring the math pre-reqs)?
21. ### Purcell electrostatics problem

Homework Statement The question is 1.3 from Purcell E&M 3rd edition. It is asking you what the force on a point charge q is at the tip of a hollow cone (no bottom surface). Homework Equations F = (1/4pie0)*(qQ / r^2) The Attempt at a Solution I have worked on this on and off...
22. ### Free edition of Purcell, Electricity and Magnetism

Thirty years after learning E&M from the wonderful book by Purcell, I noticed that the copyright page of my dog-eared copy of the 1965 edition includes a notice stating that it is available for use by authors and publishers on a royalty-free basis after 1970. The book has gone through two more...
23. ### Thomas and Finney Calc to prep for Kleppner and Purcell Physics

So I have been interested in trying to do some physics that require more heavy use of calculus. I plan on getting Kleppner's mechanics book as well as Purcells E&M book. Having been out of school for so long, I need to brush up on my calculus, and I was wondering what the best approach would...
24. ### Calculus Calculus by Varberg, Purcell, Rigdon

Author: Dale Varberg, Edwin J. Purcell, Steve E. Rigdon Title: Calculus Amazon Link: https://www.amazon.com/dp/0131875337/?tag=pfamazon01-20 https://www.amazon.com/dp/0131429248/?tag=pfamazon01-20 https://www.amazon.com/dp/0132306336/?tag=pfamazon01-20
25. ### Lorentz Force & Frame Changes: Explaining E & B Fields

Lets say in frame 1 I have a neutral current carrying wire that has a +x line charge and a -x line charge and they have a relative speed between them. So In frame 1 there is only a B field. And in frame 1 we also have an electron moving with respect to the wire, so the electron is deflected...
26. ### Classical Electricity and Magnetism by Edward Purcell

Author: Edward Purcell Title: Electricity and Magnetism Amazon Link: https://www.amazon.com/dp/1107013607/?tag=pfamazon01-20 Prerequisities: Freshman mechanics. A year of calculus. Purcell introduces vector calculus from scratch, but most students who hadn't already had vector calc would...
27. ### Purcell vs Griffiths: Math & Conceptual Understanding

should i do Purcell or go straight to griffiths if the math is no problem and i want the one that provides a better conceptual understanding?
28. ### Purcell 10.15: Water Dipoles

Homework Statement Imagine that all the molecular dipoles in a cup of water could be made to point down. Calculate the magnitude of the resulting surface charge density at the upper surface of the water, and express it in electrons per square centimeter. Homework Equations The...
29. ### How does adding resistance affect the frequency of a series RLC circuit?

Homework Statement This is to look at the effect of damping on the frequency of a series RLC circuit. Let W=1/(sqrt(LC)) be the frequency of an undamped circuit. Suppose enough resistance is added to bring Q down from infinity to 1000. By what percentage is the frequency, ω, thereby shifted...
30. ### Dynamo Set Up and Rotation Direction's Effect on Self-Excited DC Generator

Homework Statement There is a picture of two possible set ups for a dynamo-- the only difference I can see is the direction in which the main shaft rotates. He says that it is a "self-excited dc generator" because the rotation of the shaft inside of the single loop coil provides the changing...
31. ### Calculating EMF for a Moving Loop Near a Wire with Current

Homework Statement A wire lies at height z=h carrying current parallel to the y-axis. A square loop, of side length b, is moving in the direction of +x with a velocity v. Find the magnitude of the emf at the moment when the center of the loop crosses the y-axis. Homework Equations...
32. ### Flux in Through/ Out of Caps Purcell

"Flux in Through/ Out of Caps" Purcell Homework Statement I'm working problem 5.11 in Purcell's E&M book. It's about relativistic particles, and the eventual condition about angles at which the E-field lines are directed. The ultimate goal is to prove that tan(\varphi)=\gammatan(\theta)...
33. ### Qausi-static displacement current (Purcell)

"Qausi-static" displacement current (Purcell) Hello all, On page 329, chapter 9 of Purcell's E&M book, he describes why the "displacement current" produces nearly zero magnetic field for slowly varying fields. By taking the curl of the displacement current Jd, he shows that...
34. ### Griffiths vs Purcell vs Schwartz for undergrad E&M

So I'll be taking undegrad E&M 1 next semester and was looking for a good book to prepare for it before the semester starts. People seem to like Griffiths and Purcell generally. Shwartz also seems to have some good reviews (and is quite cheap) on Amazon but I'm not quite sure what level it is...
35. ### Purcell - Electricity and Magnetism

Does anyone know where I can purchase the hardcover 1985 Electricity and Magnetism? Some schools, such as Caltech and MIT, still use the book; however, Caltech does not have it in their online bookstore and MIT lists an 09 edition (which I assume is an ebook?). Some copies are floating...
36. ### Purcell Tricky Three Plate Capacitor Questions

This is problem 3.8 from Purcell's E&M. Three conducting plates are placed parallel to one another. The outer plates are connected by a wire. The inner plate is isolated and carries a charge of 10 esu per cm^2. In what proportion must this charge divide itself into a surface charge on the top...
37. ### Are you a fellow physics student using Purcell & Kleppner?

Hey guys, I used Kleppner and Kolenkow last semster,it is an alright book, although sometimes a bit to dry and heavy in its explanations, and am using Purcell now, the Berkeley edition, very happy and satisfied by it. Just curious if there are any fellow physics students using these books...
38. ### Potential energy - Purcell

A spherical volume of radius, a, is filled with charge of uniform density, p. We want to know the potential energy, U, of this sphere of charge, that is, the work done in assembling it. Calculate it by building the sphere up layer by layer, making use of the fact that the field outside a...