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Posts tagged electromagnetism

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Q&A Magnetization as a function of temperature in ferromagnets

Suppose a ferromagnetic material with initial magnetization $M_o$.Is there some specific formula which calculates the total magnetization $M$ as a function of $M_{o}$ and the Curie temperature $T_{...

1 answer  ·  posted 1y ago by MissMulan‭  ·  last activity 10mo ago by Anyon‭

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Q&A Maxwell equations EM wave confusion

The general formula for a EM wave (solving for the E field) is: where $\varepsilon = \varepsilon _{r}+j\frac{\sigma }{\omega }$ My professor told me that the conductivity of vacuum is 0 so we...

0 answers  ·  posted 1y ago by MissMulan‭

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Q&A maxwell equation in 1d

Maxwell's first law in differential form states that $$ \triangledown \cdot E = \frac{\rho}{\epsilon_{o}} $$ . In case of 1d can we say that $$\rho = \lambda$$ where $$\lambda$$ is the linear char...

1 answer  ·  posted 1y ago by MissMulan‭  ·  last activity 1y ago by celtschk‭

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Q&A How exactly do eddy currents slow down objects moving though a magnetic field

When a pendulum made of a conducting material moves through a magnetic field, it's a well-established fact that it experiences a retarding force, thus slowing it down, however, I'm unable to unders...

1 answer  ·  posted 1y ago by esrdtfghjk‭  ·  last activity 1y ago by Olin Lathrop‭

Question electromagnetism
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Q&A Calculate inductance using laws of electromagnetism

Get 2 conductors and seperate them we can use Gauss's law to calculate the capacitance created by the seperation of the 2 conductors.Can we use other laws of electromagnetism to calculate the induc...

2 answers  ·  posted 1y ago by MissMulan‭  ·  last activity 1y ago by TonyStewart‭

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Q&A What is $\mathcal{O}$ in integration of potential?

I saw following equation in Griffiths EM $$V(r)=-\int_\mathcal{O}^r \vec E \cdot d\vec l$$ While the surface was closed but not symmetrical circular. At first I was thinking $\mathcal O$ was repr...

1 answer  ·  posted 2y ago by deleted user  ·  last activity 2y ago by deleted user

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Q&A Motion of charged particle inside a magnetic field

We have place a charged particle of 2C with mass 2kg, 1mm above a current-carrying wire of 1A.The charged particle has an initial velocity of 100m/s The magnetic field of the wire for simplicity w...

0 answers  ·  posted 2y ago by MissMulan‭  ·  edited 2y ago by MissMulan‭