I saw that before I made this thread. That's not quite as much information as I'd hoped.
I was hoping for sort of like an introduction on the subject. For example, the first textbook I ever learned E/M out of is by Arthur Kip. Each chapter is organized in two parts. First, they present a law...
Consider the following circuit:
http://www.ibiblio.org/kuphaldt/electricCircuits/DC/00207.png
The voltage at the node between the resistors is:
V = (V1/R1+V2/R3)/(1/R1+1/R3+1/R2)
Suppose R1 = R3 = R. Then:
V = (1/R)(V1+V2)/(2/R+1/R2)
V = (V1+V2)/(2+R/R2)
Now let R go to zero...
An electric charge produces a Coulomb electric field:
E = dqe r/r3
A current element produces a Biot-Savart magnetic field
B = i dl×r /r3
From what I understand, magnetic charges are inserted for the sake of making Maxwell's equations symmetric.
A magnetic charge is meant to produce a...
Hi everyone. This isn't a homework problem. Rather, I'm trying to understand how the δ term arises from the field of a dipole.
Homework Statement
Greiner supplies the following one-line derivation, which is easy to follow I guess, but doesn't make logical sense to me. Specifically, I don't...
According to Fractional Calculus, the power rule can be written as
(dm/dzm) zn = n!/(n-m)! zn-m
For example,
(d1/2/dz1/2) z1/2 = (1/2)!/(1/2-1/2)! z0 = (1/2)√π
To find the residue of f(z) = f(z)/(z-z0)m at z→z0, the formula is Res(z→z0) f(z) = 1/(m-1)! dm-1/dzm-1 f(z).
For...
The three circuit elements are capacitors, resistors, and inductors, which act in the following manner:
Capacitor: V = (1/C) q
Resistor: V = R dq/dt
Inductor: V = L d2q/dt2
Is it possible to build a passive device that acts like:
V = (const.) d3q/dt3
Google search has come up with...
Simple question. It came out of lecture, so it's not homework or anything. My professor said that the curl of a vector field is always perpendicular to itself. The example he gave is that the magnetic vector potential A is always perpendicular to the direction of the magnetic field B. (I haven't...
Head down to your university library, and find the section where they store all the old editions of physics textbooks. Sit down, and read through the section you're learning, and pick out two that you think explains that section best. This is important. First, this teaches you how to judge the...
Just use your TI-83. Dot products and cross products can both be expressed by matrices, which is included in the TI-83. Alternatively, you can write a program that just spits out your desired numbers.
Your method for part 3 is correct. However, your method for part 1 is incorrect, which led to an incorrect answer. Next time, try to do the problem with variables as opposed to numbers. It looks cleaner, and it's easier to identify where you went wrong.
In the setup of the problem, the balloon...