All Questions
Tagged with electromagnetism experimental-physics
51
questions with no upvoted or accepted answers
5
votes
0
answers
155
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How can one confirm creation of magnetic graphene?
Recently my high school physics teacher contacted me looking for an expert to ask about this situation. I am paraphrasing his correspondence below:
I just had a a student accidentally create magnetic ...
- 353
4
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0
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160
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What experiments confirmed Poynting's Theorem?
Actually, I have two related questions. The fist is the above question. The second is, what experiments confirmed that $\varepsilon_0\left(\frac{E^2}{2} + c^2 \frac{B^2}{2}\right)$ is the ...
2
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0
answers
66
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How exactly does J. J. Thompson's cathode ray experiment show that electrons are particles?
I've have heard in many places that J. J. Thompson used a magnet and capacitor plates to look at the effects of the electric and magnetic fields on the cathode ray. This way, he was able to deduce the ...
- 8,660
2
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97
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Optimal pump wavelength for frequency doubling in periodically poled media
Background
I am currently working on achieving second harmonic generation (SHG) in periodically poled lithium niobate (PPLN) using a 1560 nm pump laser. PPLN makes use of quasi-phase-matching of the ...
- 2,333
2
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0
answers
402
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Odd experiment results (electromagnetics)
Okay, a bit of background. So I'm working on a linear accelerator (you might know it as a Gauss rifle), and I had worked through the equations I thought I needed (Magnetic force, displacement, etc.)
...
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2
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0
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113
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Strength of Magnet in Magnetic Bearings
While reading about magnetic bearings, one reads about passive/active magnetic bearings. By passive, one means no electric current is put into the bearing for attaining magnetic levitation/flux. In ...
- 303
2
votes
2
answers
341
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Reference frequency
In my experiment, I have to obtain a relation between magnetic field of a solenoid and the applied Vp-p.
The setup is as follows.
http://www.teachspin.com/instruments/faraday/
Does my choice of ...
- 748
2
votes
0
answers
478
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Levitation rotation speed involving laser acceleration, pyrolytic graphite and a vacuum
The experment would involve a small NIB magnet levitating between or on the diamagnetic material pyrolytic graphite, unlike other forms of levitation this doesn't require power to run such as ...
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1
vote
1
answer
81
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Measurement of Electric field
I am aiming to measure the strength of an electric field at different positions in space. The electric field is generated by a coil, which is driven by an AC current. This work is based on this paper: ...
1
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0
answers
48
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Do we experimentally know how a magnet reacts in a curling / non-zero-curl magnetic field?
There are two possible formulas for the magnetic force on a magnetic dipole moment due to the inhomogeneity of the magnetic field:
$$ \vec{F}_{A} = \nabla (\vec{m}\cdot\vec{B}) \qquad\text{ and }\...
- 8,660
1
vote
0
answers
41
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Wave impedance experiment using a wave guide
I am conducting an experiment to reduce wave guide impedance. To do this, I have a wave guide emitting microwaves down the tube then into free space. A oscilloscope is connected to a to a standing ...
- 433
1
vote
0
answers
135
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Wave impedance in a wave guide
I'm trying to get a better understanding of impedance for a wave guide. First of all, my current understanding of the topic is that its a ratio of the electric field amplitude over the magnetic field ...
- 433
1
vote
1
answer
99
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Experiment for jammers
I'm going to grade 11 and I have to write an essay in physics. One requirement is to do an experiment which - in the best case - also includes measurements.
I would like to write about jammers, which ...
1
vote
0
answers
34
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Guoy method derivation, or, how not to break math?
I start from $d\vec{F}=\nabla(\vec{m}\vec{B})$, $\vec{M}=\frac{d\vec{m_i}}{dV}$, and $\vec{M}=\frac{\chi_v}{\mu_o}\vec{B}$.
I write out the definition of the force, determine we're only interested ...
- 33
1
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94
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Investigating the relationship between a changing B field and the curl of the electric field induced
I am currently working on a 12 page lab report on Faraday's law, essentially investigating, how for different magnetic field strength through a stationary loop of wire with N number of turns, effects ...
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