All Questions
Tagged with electromagnetism forces
524
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What is the force between two charges moving at 0.5c relative to each other? [closed]
Suppose two charges, $q_{1}$ and $q_{2}$ are in uniform translational motion relative to each other. If the relativity velocity is relativistic, e.g. $0.5c$, how can the force between the two charges ...
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Where does force act in two parallel current carrying conductors?
F=ILB.so consider length as 5 m and I as 2 ampere and B as 5 T.so the force is 50 N.does this 50 N act at one point or equally applied on full length like pressure.So what does force/length in this ...
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Apparent singularity of Magnetic field generator by a ♾️ conductor [closed]
Let's assume two perpendicular wires: one is infinitely long and the other's length is $l$ (finite).
The second wire is placed vertically on top of the infinitely long wire and there is a distance of ...
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Is the magnetic Lorentz force $\vec{F} = q(\vec{v}\times\vec{B})$ a force of constraint?
I am currently studying the Lagrangian mechanics, and as far as I've understood, forces of constraint are the forces that are perpendicular to the surface of the movement of the object, thus do not ...
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Can the following set up be used to propel something upwards?
Let A and B be solenoids with the same pole facing each other.
Then will their repulsion cause the set up to jump upwards?
Please correct me if I am wrong:
Solenoid A exerts a downward force on ...
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How do you calculate the force between an electromagnet and a piece of iron? [closed]
I am building a simple electromagnet, with an Iron core, and want to calculate the force it can exert on another piece of Iron when in direct contact with it (Basically how much weight it can lift). ...
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Where does the Force on an Electron Come From?
The interaction (of an electron with an external electromagnetic field) is because of the electron's charge, but charge causes an electric field, so, by Syllogism one can say the interaction is ...
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The force experienced on a charge, using macroscopic quantities
Zangwill says (Zangwill, Modern Electrodynamics, 2012 edition, page 40, undersection 2.3.1, "Lorentz Averaging")
...An example is the force on the charge density $\rho$ and current
density $...
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132
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Ratio between electric and magnetic forces
Suppose I have two beams of electrons moving at speed $v$ separated by a distance $d$. I can work out magnetic and electric forces between them...
For the magnetic force, we treat the two beams wires ...
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Time lag for generation of electrostatic force
Suppose we make a certain point in space charged. Say we impart some negative charge, such that electrostatic condition is maintained.
Then, after the point gets charged will the electric field due to ...
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Is tension a reaction force or an restoring force?what is tension then?what are the differences in them?
Assume a rope of mass $M$ is connected to a fixed wall and is free from other end
Now,I pull on the end of the rope
My simple questions are:
1.What is the reaction force/Newton's 3rd law pair force ...
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Can a current carrying loop experience force due to its own magnetic field?
In my opinion, the wire must expand due to the magnetic force acting radially outwards on two diametrically opposite ends of the loop as a result of the equation:
F = I(dl × B)
Where B is the ...
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Forces in microscopic scale [duplicate]
When I was thinking about mechanical forces being electromagnetic in nature , This question came to my mind ,
How do we exert such large forces when at the microscopic scale we moved such a small ...
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Poincaré inverse square law unification
A while back, I came across a claim that was something like this: Poincaré said that no two fundamental force laws could have the same mathematical form such as $1/R^2$; that no two fundamental force ...
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U-shaped magnet and the moving charge: Where is the origin of the Lorentz force from the viewpoint of the moving charge?
Assume that a charge $+q$ is located at rest between the poles of an infinitely long U-shaped magnet, which is laid along the $x$-axis. If the charge slowly accelerates to a velocity $v$ along $x$ and ...
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Why is electromotive force in magnetohydrodynamics a vector quantity?
In the mean-field dynamo theory in magnetohydrodynamics, I frequently came across a quantity;
$\langle v'\times B' \rangle$, which is termed as the mean electromotive force. I want to know that why is ...
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Enhanced capacitance by magnetism?
Consider the first picture.
This is much like a parallel plate capacitor charged by a battery. But instead of parallel plates we are using parallel rings. The rings are attracting each other because ...
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Lorentz Force and current carrying wire in an homogeneous magnetic field
Consider the following situation.
There is a metallic strip situated in an homogeneous electric field. The lines of the electric field go from left to right, so the free electron in the metallic ...
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If magnetic force is perpendicular to the direction of motion, does that mean the direction of motion prior to the magnetic force doing anything?
I want to make sure I'm understanding this correctly:
My understanding is that magnetic force can do no work because it can never change the speed of an object -- instead it can only cause ...
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How can the unit of Newtons measure both gravity and electromagnetism?
For context, I was thinking about forces. Force is the mass of the particle multiplied by the acceleration it undergoes. There are different kinds of forces, for example, gravity and electromagnetism. ...
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Deriving Lorentz force from relativistic force
By EQ.$72$ of this, Richard Haskell proves Lorentz force law in subsequent sections. During the proof he says that,
Suppose a conductor of charge density $\rho'$ be at rest inside a frame of reference ...
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If friction and normal force are both the components of contact force, shouldn't the friction be repulsive?
Is friction due to intermolecular attractive forces or repulsive ones.
Since both friction and normal force are the components of contact forces, shouldn't friction be repulsive.
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Do the other 3 fundamental forces also warp space-time?
I got this idea from Einstein's insight using the falling elevator. He says, that Gravity really cannot be distinguished from any other force accelerating the elevator.
A bunch of questions on here (...
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Do forces get affected by relativity?
Do forces change their behavior due to the relativity?
For example if a charged particle deflects through an electric field, would the pattern and amount of deflection differ in speeds near speed of ...
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On the infinite range of the electromagnetic force
I am curious as to whether there is a fundamental reason why weak and strong nuclear forces have such a short range whereas gravity and the electromagnetic force seem to have infinite range.
Since ...
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Magnetic force calculation for parallel wires using Maxwell stress tensor. Issue with shear forces
I am trying to calculate the forces in between permanent magnets and ferromagnetic surfaces with the Maxwell stress tensor using image theory and the Biot-Savart law. However I discovered a weird ...
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Why the magnet travels through solenoid faster if we connect a bulb to a solenoid
When a magnet travels linearly through a solenoid at a fast enough velocity if the ends of solenoid are connected to each other, the induced EMF generated and Lenz Law the solenoid opposes the motion ...
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When I push a 24-karat gold bar with my finger, what subatomic physics are at play? [duplicate]
I chose a pure gold bar to eliminate the possibility of any chemical reactions occurring, the same question would apply to any everyday object like a wooden block or a marble. Or it could apply with ...
user350881
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Doubt about Electromagnetic Attraction b/w Electromagnet-Iron vs Electromagnet-Electromagnet
https://www.supermagnete.de/eng/faq/What-is-the-difference-between-the-combination-magnet-magnet-and-magnet-iron
At full contact, the attractive force between a raw magnet and an iron plate is the ...
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Tension generated in a metallic loop placed in a time varying magnetic field [closed]
We have a metallic wire circular loop of resistance $R$, having radius $a$, placed in a magnetic field $\bf{\vec{B}(t)}$. The magnetic field is perpendicular to the plane of the wire.
The magnetic ...
