All Questions
Tagged with electromagnetism experimental-physics
192
questions
18
votes
5
answers
2k
views
Can we measure an electromagnetic field?
As far as I can check, the Aharonov-Bohm effect is not -- contrary to what is claimed in the historical paper -- a demonstration that the vector potential $A$ has an intrinsic existence in quantum ...
- 10.6k
4
votes
2
answers
4k
views
First experiment which was used to prove existence of Electromagnetic waves
When I was in high school I heard from my physics teacher in the last year of high school when he was starting the chapter of electromagnetic waves that the first person who proved existence of ...
3
votes
4
answers
5k
views
Magnetic fields and gravitational waves. How far do they reach?
I read that magnetic fields perpendicular to a current shoot out and expand all the way to infinity.
Additionally a gravitational wave, no matter how small will also expand to infinity at the velocity ...
- 345
2
votes
1
answer
126
views
Can a SQUID perform real time measurements of a slow varying magnetic flux?
It is well known that a SQUID can detect an extremely small magnetic flux.
What if the flux is time-dependent? E.g. a slow varying sinusoidal magnetic flux
$$\Phi=\Phi_0\sin(\omega t).$$
Can I ...
- 1,995
2
votes
1
answer
338
views
What is the reason behind the shape of the absorption curve of electron paramagnetic resonance
In our EPR experiment, the signal looks like the "first derivative" part of the above picture. Why is this? What does the "first derivative" mean and why is it the quantity our instruments detect in ...
- 4,962
2
votes
0
answers
478
views
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 ...
- 291
1
vote
0
answers
93
views
How to set the electric potential on a certain boundary to a certain value experimentally?
In electrostatic boundary value problems, usually the potential is set to some function or a constant on a certain boundary. It is never taught or told in textbooks how such assignment might be ...
- 17.1k
15
votes
6
answers
30k
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How do you determine power flow direction in a transmission line?
Below is a picture of a typical transmission line(about 200 kV). Is there a simple physics experiment which can be performed safely near the line, to determine the power flow direction. Or in other ...
- 2,697
4
votes
1
answer
2k
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Measuring the vacuum permittivity
So I was reading the EF experiment that's used at the MIT to measure the vacuum permittivity and I was thinking about trying it just to see how it works:
http://ocw.mit.edu/courses/physics/8-02x-...
- 71
3
votes
1
answer
379
views
PNMR, Pulsed Nuclear Magnetic Resonance, Experiment
I am writing a lab report for class on PNMR experiment that we did. How come in this experiment we don't worry about the electron spins in our sample? Aren't the electrons affected by the PNMR machine ...
- 3,871
18
votes
5
answers
4k
views
Home experiments using wireless LAN or mobile phones about electromagnetism?
Are there any nice experiments using wireless LAN access points or routers or mobile phones to demonstrate physical features of electromagnetic fields, especially em-waves?
More precisely I am ...
58
votes
12
answers
15k
views
Home experiments to derive the speed of light?
Are there any experiments I can do to derive the speed of light with only common household tools?
- 6,000