What is magnetic field made up of?

[Zheng_]

Homework Statement

A magnetic field is made up of

A) positive and negative charges.

B) magnetic domains.

C) flux lines.

D) magnetic poles.

Homework Equations

The Attempt at a Solution

I thought magnetic field is made up of.. nothing ? Or does it mean 'What does magnetic field produced by'?

 

[Orodruin]

The question does not make sense as it stands. The magnetic field is a fundamental entity in classical electrodynamics.

 

[Drakkith]

Is this an actual homework problem? If so, I'd say 3 of the options are not the magnetic field itself, but something else.

 

[Zheng_]

Yes. And it's also a question of previous years exam.

 

[Zheng_]

That why I'm so confused about what does it mean.

 

[Orodruin]

Is this an actual homework problem? If so, I'd say 3 of the options are not the magnetic field itself, but something else.

I would say none of the options make sense. This is a question written by someone who does not know what they are doing.

 

[Zheng_]

I would say none of the options make sense. This is a question written by someone who does not know what they are doing.

Ok thanks for the help. I guess I will ask my teacher on the next class.

 

[Zheng_]

Is this an actual homework problem? If so, I'd say 3 of the options are not the magnetic field itself, but something else.

Yes. And it's also a question from previous years exam.

 

[Orodruin]

Just to be clear here. I suspect the answer your teacher wants is "magnetic field lines" (the others are sources for the magnetic field). This is about as accurate as saying that a force is made up of a vector arrow (i.e., not accurate at all). Vector arrows and field lines are visual/mathematical (depending on whether we just use the picture or also the maths) tools that we use to visualise and describe the concepts of forces and fields, they are not what the forces/fields are made up from in any way.