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Dikshant
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If an electric charge is moving with constant velocity,what does it create?? A constant magnetic field or 1 which is varying with time?? What if it accelerate?
Does a wire with a constant current through it create a magnetic field?Dikshant said:If an electric charge is moving with constant velocity,what does it create?? A constant magnetic field or 1 which is varying with time?? What if it accelerate?
Thanks for reply,but m already a bit confused and that's a different case.Vagn said:Does a wire with a constant current through it create a magnetic field?
Yeah,a constant magnetic fieldVagn said:Does a wire with a constant current through it create a magnetic field?
AndChrisVer said:yes it generates a constant in time magnetic field following the Biot Servart law
http://maxwell.ucdavis.edu/~electro/magnetic_field/pointcharge.html
If it is accelerated it is going to generate radiation (time varying magnetic field)
ChrisVer said:yes it generates a constant in time magnetic field following the Biot Servart law
http://maxwell.ucdavis.edu/~electro/magnetic_field/pointcharge.html
If it is accelerated it is going to generate radiation (time varying magnetic field)
ChrisVer said:yes it generates a constant in time magnetic field following the Biot Servart law
http://maxwell.ucdavis.edu/~electro/magnetic_field/pointcharge.html
If it is accelerated it is going to generate radiation (time varying magnetic field)[/QAnd
The fields from a moving charge are given by the Lienard Wiechert potentialsDikshant said:If an electric charge is moving with constant velocity,what does it create?? A constant magnetic field or 1 which is varying with time?? What if it accelerate?
You are misinterpreting this. There is no explicit time dependence, but r is a function of time. So the field is not constant in time.ChrisVer said:yes it generates a constant in time magnetic field following the Biot Servart law
http://maxwell.ucdavis.edu/~electro/magnetic_field/pointcharge.htmld
The relationship between moving charges and magnetism is known as electromagnetism. When an electric current flows through a wire, it creates a magnetic field around the wire. Similarly, when a magnetic field is applied to a wire, it can induce an electric current in the wire. This phenomenon is known as electromagnetic induction.
A permanent magnet is a material that produces a magnetic field without the need for an external source of electricity. It is made of ferromagnetic materials such as iron, cobalt, or nickel. On the other hand, an electromagnet is a coil of wire that produces a magnetic field when an electric current is passed through it. The strength of the magnetic field in an electromagnet can be controlled by changing the amount of current flowing through the wire.
The direction of a magnetic field around a current-carrying wire follows the right-hand rule. If you wrap your right hand around the wire with your thumb pointing in the direction of the current, your fingers will curl in the direction of the magnetic field.
Moving charges are essential in creating a magnetic field. When charges move, they create a magnetic field around them. This is because moving charges are surrounded by an electric field, and when they move, the electric field becomes distorted, resulting in a magnetic field. The strength of the magnetic field is proportional to the speed of the moving charges.
The strength of a magnetic field decreases as the distance from the source increases. This is known as the inverse-square law. The strength of a magnetic field is inversely proportional to the square of the distance from the source. This means that the farther you are from the source, the weaker the magnetic field will be.