Induced Magnetic Field: Moving Arbitrary Conductors in Nonuniform Fields

So, in summary, when a conductor moves through a nonuniform magnetic field, the induced electric field in the conductor is equal to the product of the velocity of the conductor and the magnetic field, integrated around the conducting loop. Susceptibility of the conductor is irrelevant in this case.
  • #1
vibe3
46
1
If I have some arbitrary conductor moving through a (nonuniform) magnetic field [itex]\mathbf{B}(\mathbf{r})[/itex], would the induced field in the frame of the conductor be something like:
[tex]
\mathbf{B}_{IND}(\mathbf{r}) = T \mathbf{B}(\mathbf{r})
[/tex]
where T is some diagonal matrix whose entries are related to the susceptibilities of the conductor?

I'm having trouble finding any reference on this other than a wire moving through a uniform field with some velocity.
 
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  • #2
vibe3 said:
If I have some arbitrary conductor moving through a (nonuniform) magnetic field B(r)B(r)\mathbf{B}(\mathbf{r}), would the induced field in the frame of the conductor be something like:
BIND(r)=TB(r)BIND(r)=TB(r)​

The induced field in the conductor is an electric field not a magnetic field. Susceptibility of the conductor is irrelevant.

The voltage or EMF = C E⋅dl where E is the electric field in the conductor and dl is an elemental conductor length.
For a varying magnetic field B(x,y,z) and a conductor C moving with velocity v the
EMF = C
(vxB)⋅dl where the integral is taken around the conducting loop C.
 

Related to Induced Magnetic Field: Moving Arbitrary Conductors in Nonuniform Fields

1. What is an induced magnetic field?

An induced magnetic field is a magnetic field that is created in a material or substance due to the presence of a changing magnetic field in its vicinity. This change in the magnetic field can be caused by moving conductors, changing electric currents, or the presence of permanent magnets.

2. How is an induced magnetic field created?

An induced magnetic field is created when a conductor or material moves through a nonuniform magnetic field. This movement causes a change in the magnetic flux, which in turn induces an electric field in the conductor. This electric field then creates a current, which in turn creates a magnetic field.

3. What is the relationship between induced magnetic fields and Faraday's law?

Induced magnetic fields are closely related to Faraday's law of electromagnetic induction. This law states that a changing magnetic field will induce an electric field, which in turn creates a current. In the case of an induced magnetic field, the current created by the electric field will in turn create a magnetic field.

4. How do induced magnetic fields affect the behavior of conductors?

Induced magnetic fields can cause conductors to experience a force known as the Lorentz force. This force is perpendicular to both the direction of the magnetic field and the direction of the current in the conductor. This force can cause conductors to move or change direction, and is the basis for many electromagnetic devices.

5. What are the practical applications of induced magnetic fields?

Induced magnetic fields have a wide range of practical applications. They are used in generators to convert mechanical energy into electrical energy, in motors to convert electrical energy into mechanical energy, and in transformers to change the voltage of an alternating current. They are also used in various sensing devices, such as compasses and magnetic field sensors.

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