They fill the space around a magnet where the magnetic forces work, where they can attract or repel magnetic materials.
It would be difficult to draw the results from the sort of experiment seen in the photograph, so we draw simple magnetic field lines instead. If the properties of a material could be electrically tuned after production, it would be possible to easily obtain the desired functions when needed, further increasing the range of materials that could be used in magnetic devices.
Prior studies have reported that it is possible to erase the magnetic properties of a material by the application of an electric field. The research group of Associate Professor Daichi Chiba at the University of Tokyo Graduate School of Engineering and the Central Research Institute of Electric Power Industry has shown that the strength of a magnetic moment induced in palladium, a metal which is usually non-magnetic, is electrically controllable, and that application of a positive voltage induces a stronger magnetic moment than a negative voltage. Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. Does it oscillate at the wrong time compared to other magnetic or electric fields to interact with them? No it's not like that, as I was saying, in Classical theory according to the principle of Superposition the fields do not interact with each other. So, it's impossible to guide a beam of light in a magnetic field like they do in accelerators? But if the situation is not in vacuum then light waves passing by matter are affected by matter: slowed down, bent, absorbed, maybe even distorted into other frequencies of wave.
Electric and magnetic fields can modify these interaction parameters of a substance, depending a lot on which substance it is. So in a vacuum it is completely impossible for light to be affected in any way by other magnetic fields no matter how strong?
If light is affected by gravity, does that mean gravity affects electrical&magnetic fields too?
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Does there exist a complex function which is differentiable at one point and nowhere else continuous? When an electrical charge is moving or an electric current passes through a wire, a circular magnetic field is created. This can be seen with iron shavings or filings on a card that will align in the magnetic field when a current is passed through a nearby wire. This field can be demonstrated by placing fine iron filings or shavings on a car and sticking a wire through the middle of the card.
Certain conventions are used to determine the direction of the magnetic field with respect to the direction of the current.
The convention for a magnetic field is that the lines of force move from north (N) to south (S). The right-hand rule for determining the direction of the magnetic field is that if you wrapped your right hand around a wire with your thumb pointing in the direction of the electrical current, then your fingers would be in the direction of the magnetic field. You can verify the direction of the magnetic field by placing one or more compasses on a card and observing their direction.
This research has demonstrated the possibility of electrically inducing magnetism in non-magnetic materials.
One possible mechanism to explain the increased magnetic moment is that, when a voltage is applied to the structure shown in the figure, charges within the palladium layer accumulate near the surface because the surface is covered by ions. In fields that employ magnetic materials, tuning of magnetic force and control of magnetization direction (together, these properties are termed the “magnetic moment”) has been demonstrated by applying a voltage to a capacitor containing a magnetic film as one electrode and charging and discharging charge carriers (electrons) from the electrode.
However, there are no reports of successfully inducing and cancelling magnetic properties in a non-magnetic material by the same method.
This is primarily due Principle of Superposition which states that fields themselves don't interact with each other. So light waves (electromagnetic waves) are nominally unaffected by magnetic and electric fields.

Using standard conventions for the direction of electric current and magnetic lines of force, the direction of the magnetic can be determined by what is called the right-hand rule for magnetic field. Since electrical current moving through a wire consists of electrons in motion, there is a magnetic field around the wire. When a DC electrical current is passed through the wire, the iron filings align to show the magnetic field. It is an unfortunate choice that was made years ago, but you need to be aware of the convention. We don't know if they move in that direction or not, but it is just a convention that everyone follows. Otherwise with AC, the direction of the current and magnetic field will alternate 50 or 60 times a second. Iron filings on a card can demonstrate the magnetic field when current is passed through a nearby wire. It is expected that this method will dramatically reduce power consumption compared to conventional means of controlling magnetic moment (heating, magnetic field or electric current application). Using standard conventions for the direction of electric current and magnetic lines of force, the direction of the magnetic can be determined by what is called the right-hand rule. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience.
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