All Questions
3
questions
0
votes
2
answers
155
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Taylor Expansion for a configuration of $2$ point charges on a line
Was getting back into physics and reading a chapter on electrostatics which sets up the following situation. We have a configuration of point charges - one $-q$ at the point ($-d,0,0$) and one $+q$ at ...
- 2,220
2
votes
0
answers
60
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Approximate value of hyperbolic tangent in certain case
I am reading Thé Nature of Magnetism. While reading, I came across a particular approximation of hyperbolic tangent
while in first case $T>T_c$ , it is just Taylor series,
in case $T < T_c$ ( ...
- 21
0
votes
2
answers
172
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Binomial series expansion of a trinomial?
In electrostatics, the potential of a charge $q$ placed on the $z$-axis at $z=a$ is
\begin{equation}
\phi=\frac{1}{4\pi \epsilon_0}\frac{q}{r_1}
\end{equation}
where $r_1$ is the distance from the ...
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