Tagged Questions
1
vote
5answers
88 views
Is there a more scientific term for “obstruction of EM waves”?
When EM waves pass through things like rain and hail, they can be "obstructed" and bounced back or absorbed, rather than passing through.
I'm conducting an experiment on this effect, and wondered if ...
1
vote
0answers
41 views
What name would you give to the method of approximating an arbitrary magnet with many smaller dipoles?
Let's say I had an arbitrarily shaped permanent magnet, with total magnetic moment $M_{0}$. Ways to calculate the magnetic field of this magnet include an analytic solution (if one exists), as well ...
0
votes
1answer
52 views
Reason for the convention about polarization states
I'd like to know if there is a special reason for limiting convention of polarization state to waves that can be split in just two components of equal frequency.
2
votes
2answers
251 views
What does physics study?
Wikipedia definition: Physics (from Ancient Greek: φύσις physis "nature") is a natural science that involves the study of matter[1] and its motion through spacetime, along with related concepts such ...
0
votes
0answers
112 views
What is the electric field part of an EM wave? Radiation field or the induction field?
Look at this image:
I wonder if the electric field is from the induction field from a vibrating electron or the radiation field? If it is from the radiation field, as I suppose, than can someone ...
2
votes
4answers
601 views
Work done by the Magnetic Force
The magnetic part of the Lorentz force acts perpendicular to the charge's velocity, and consequently does zero work on it. Can we extrapolate this statement to say that such a nature of the force ...
8
votes
8answers
3k views
What is the difference between electric potential, voltage and electromotive force?
This is a confused part ever since I started learning electricity. What is the difference between voltage and electromotive force (emf)? Both of them have the same SI unit, right? I would appreciate ...
1
vote
1answer
3k views
Is there a name for the derivative of current with respect to time, or the second derivative of charge with respect to time?
This measurement comes up a lot in my E&M class, in regards to inductance and inductors.
Is there really no conventional term for this?
If not, is there some historical reason for this omission?
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