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hasan_researc
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Homework Statement
Why does a moving charge act as a source of magnetic field?
Homework Equations
The Attempt at a Solution
I have to idea as to how I should proceed!
graphene said:There is no simple explanation. You will have to look into quantum electrodynamics.
PiTHON said:Would the answer be "because there is a changing electric field"?
hasan_researc said:Why?
graphene said:Yes, but the question was why, "why does a current produce a magnetic field" ?
We give below the full list of transformations. All primed quantities are measured in the frame F', which is moving the positive x direction with speed v as seen from F. Unprimed quantities are the numbers which are the results of measurements in F. As usual, [tex]\beta[/tex] stands for [tex]\tfrac{v}{c}[/tex] and [tex]\gamma[/tex] for [tex]\frac{1}{\sqrt{1-\beta ^2}}[/tex]
The movement of charged particles creates a magnetic field around them. This is known as the magnetic field produced by a moving charge or current.
The direction of the magnetic field is perpendicular to the direction of the moving charges. This means that if the charges are moving in a straight line, the magnetic field will form circles around the path of the charges.
The formula for calculating the magnetic field produced by a moving charge is B = µ0qv/2πr, where B is the magnetic field, µ0 is the permeability of free space, q is the charge of the particle, v is the velocity of the particle, and r is the distance from the particle to the point where the magnetic field is being measured.
The strength of the magnetic field decreases as the distance from the moving charge increases. This is because the magnetic field follows an inverse square law, meaning that the strength of the field is inversely proportional to the square of the distance from the source.
Yes, moving charges and magnetic fields can affect each other. When a moving charge passes through a magnetic field, it experiences a force known as the Lorentz force. Similarly, a changing magnetic field can induce a current in a nearby conductor, known as electromagnetic induction.