# Does moving an insulating cylinder produce a magnetic field?

lelouch_v1
Suppose that we have an insulating cylinder with ##\rho_q##. If i move the cylinder towards ##+\hat{n}##, will it produce a magnetic field? My assumption is that since we have an insulator, then the electrons are bound and there cannot be a current, thus a magnetic field is not produced. Also, does this happen if we have a material full of dielectric?

2022 Award
If i move the cylinder towards , will it produce a magnetic field? My assumption is that since we have an insulator, then the electrons are bound and there cannot be a current, thus a magnetic field is not produced.
If there is charge in motion then this is a current and there is a magnetic field.
Also, does this happen if we have a material full of dielectric?
I don't understand what you are asking here. What material is full of dielectric?

• vanhees71
lelouch_v1
If there is charge in motion then this is a current and there is a magnetic field.

I don't understand what you are asking here. What material is full of dielectric?
Assume a sphere of radius R, and from 0 to R the sphere is filled with a dielectric of permittivity ε.

2022 Award
Is it charged and moving? If so, there's a current.

• lelouch_v1
Mentor
My assumption is that since we have an insulator, then the electrons are bound and there cannot be a current
A moving charge density is a current: ##\vec j = \rho \vec v##

• vanhees71
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