All Questions
Tagged with electromagnetism forces
103
questions with no upvoted or accepted answers
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Equivalence of two equations of force on a magnet in a magnetic field
According to Biot and Savart's experiment, force on a magnetic pole m due to a circuit s' is:
$$\vec{F}=m\oint\dfrac{Ids'\times\hat{r}}{r^{2}}=m\vec{B}$$
Now if we consider the magnetic pole m as a ...
user130324
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Solenoid field calculations
I have been looking for a day or so now, into the field of solenoids (no pun intended). I had the problem of trying to lift a weight between two parallel solenoids attracting (/being attracted by) a ...
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Is there a mistake in these two equations describing force between magnetic dipoles?
The first equation appears here. (Force between magnets#Magnetic dipole-dipole interaction on Wikipedia)
$$\mathbf{F}(\mathbf{r},\mathbf{m_1}, \mathbf{m_2}) = \frac{3\mu_0}{4\pi r^5} \left[(\mathbf{...
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Can a statically charged object flying in an airplane float?
Lets say you are flying in a plane headed due west at 1000 km/h (278 m/s) with an altitude of 10km.
According to http://www.ngdc.noaa.gov/geomag-web/#igrfwmm, at 10km altitude, Earth's magnetic field ...
- 652
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Deriving Konopinski's Operational Definitions of Scalar and Vector Potential
In "What the electromagnetic vector potential describes", E. J. Konopinski asserts:
Operational definitions of $\phi$, $\mathbf{A}$ should now be expected to stem from the equation of ...
- 1,357
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Why is area considered and not volume to find the force of a solenoid?
I am doing a project involving solenoids. I found multiple websites that say the force (in N) a solenoid exerts on a soft iron bar as it enters the coils can be given by the equation $$F=(NI)^2\mu_0A/...
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Solenoid pull force & Velocity calculation
So I am building a circular accelerator (like a slightly oversimplified model version of CERN) as a physics project, and I'm at a dead end. I believe I need to know how to work out differential ...
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Interaction Between Two Bar Magnets
How would one describe the interaction between two bar magnets? In the E&M course I took we described quite a few very basic electric interactions, but things that I would have thought of as being ...
user24082
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How to calculate the Force (in Newtons) produced by a solenoid?
How would I calculate the force on an object (in Newtons) that is under the influence of an electromagnetic field produced from a solenoid? I know it would involve using the equation $B=(μNI)/L$ to ...
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Invisible Coilgun Propagation
Forgive me in advance for not being 100% accurate in my explanation. I am not an electrical engineer, nor have I academically studied physics, algebra, or anything of the sort.
So without further ado:
...
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Lorentz Force Pulsed DC Solenoid Rotating Magnets
Let's say there is a solenoid consisting of 8 loops. The Solenoid has an air core and the wire is welding wire. Each loop has a diameter of 1 Meter.
Now imagine a motor shaft running through the ...
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Work required to bring particle towards grounded plane
I have a quick question:
If you suspend a charge $q$ above a grounded conducting plane a distance $z$ above the plane, you get that the charge induces a negative surface charge on the conductor. The ...
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Regarding the Lorentz force:
I know that the Lorentz Force law states that:
$\vec{F} = q\vec{E}+q\vec{v} \times \vec{B}$
And then for the magnitude of the force, where $q_2$ is the moving charge:
$E = F/q_2$, and therefore $E =...
user239757