The space around a magnet through which it exerts magnetic force; a field of force surrounding a permanent magnet, electrical current, or a moving charged particle; called also magnetic flux and field of magnetic force.
The area of force which exists around a moving charge, e.g. an electron. Electrons flowing through a conductor (e.g. wire) produce a force in the area surrounding the conductor referred to as a magnetic field.
An invisible force that exist around all magnetic or electric currents
the region of space around an electric current or magnet, where a dectectable force is exerted on a magnetic body at any point
An identified force that exists around a magnet or electrical field.
The invisible lines of force that extend between the poles of the magnet.
area of force that exists around a magnet or a current-carrying conductor.
Strength of the interaction due to the motion of charged particles.
A region in which the electromagnetic force makes itself felt.
The portion of space near a magnetic body or a current-carrying body in which the magnetic forces due to the body or current can be detected
The region within which the magnetism of a given substance or particle affects other substances.
The portion of space near a body in which a magnetic force can be detected
Region in the neighborhood of a magnet, electric current, or changing electrical field, in which magnetic forces are observable. Magnetic fields force moving, electrically charged particles in a circular or helical path.
The region within which a body or current experiences magnetic force.
(1) The region in which the magnetic forces created by a permanent magnet or by a current-carrying conductor or coil can be detected. (2) The field that is produced when current flows through a conductor or antenna.
regions in space where electric and magnetic forces may act
the pattern of magnetism in the space around a magnet
A force field generated by moving electrical charges. An electrical current running through a loop of wire generates a magnetic field. The strength of the field depends on the current and area of the wire loop. Plasma churning through the atmosphere of the Sun drives powerful magnetic fields that sometimes produce cool magnetic storms called sunspots. A magnetic dynamo underneath Earth's crust generates a magnetic field around Earth.
The region affected by the force emanating from a magnet.
A field of magnetic force lines, usually referred to here as the pattern of magnetic force emanating from and surrounding the sun or any of the planets. ( go to first use in the text)
Region surrounding a magnetized body that acts on electrical particles or currents within its range.
A space where magnetic lines of force exist.
The area encompassed by the magnetic lines of force surrounding either a bar magnet or electromagnet. The flow of magnetic force between the opposite poles of a magnet. See field.
a physical quantity which has a definite value at each point in space. We think of the field as existing in space even though there may be no particle there to experience the force. Magnetic fields can be produced by magnets made of magnetic materials (iron in particular), by electric currents and by electric fields which change with time. The SI unit of magnetic field is the tesla, symbol T. See also field.
Magnetic fields are historically described in terms of their effect on electric charges. A moving electric charge, such as an electron, will accelerate in the presence of a magnetic field, causing it to change velocity and its direction of travel. An electrically charged particle moving in a magnetic field will experience a force (known as the Lorentz force) pushing it in a direction perpendicular to the magnetic field and the direction of motion. Also called magnetic flux.
Area surrounding magnets that deflects charged particles or other magnets.
The region of influence of a magnetized body or an electric current.
Field which accompanies any changing electric field, and governs the influence of magnetized objects on one another.
The invisible lines of force which surround a magnetic object. The space in which these lines of force exist.
A "field" of force surrounding a magnet, or magnetized object, associated with the electromagnetic force. Often represented by lines extending through space, which show the direction of the force on a test object by their direction, and the strength of that force by how far apart they are. Often confused with gravitation by beginning students, who often make statements linking the force of a planet on its neighbors to its magnetic field. In reality, in astronomy, magnetism only affects objects if they are electrically charged or magnetized, and extremely small, or not terribly large, and the magnetic field is exceptionally large. Thus, if an electrically charged atom approaches the Earth's magnetic field, it will be forced to follow the field lines, to a greater or lesser extent, depending upon its speed. Whereas, if a dust grain, even if just big enough to see without a microscope, were to do the same thing, it would go right through the field as if it weren't even there, because only the Earth's gravitational pull, and its own inertia and momentum, would be of any importance.
Force, defined in terms of the torque exerted on a test dipole.
The region of space around a magnetic body or a current-carrying body where objects can be affected by the magnetic forces due to the body or current.
a continuous function that exists at every point in space
a field in which its particles are charged with electricity causing them to point to one direction
a field of force that appears on magnetic poles or magnets, i
a force created as a consequence of the movement of the charges (flow of electricity)
an area where a magnetic force is present
an area where forces exist, brought about by electric currents or electric fields
a pattern of lines (not a field of force) that surrounds a magnet
a region around the magnet where magnet materials experience a force
a region in space
a region near a magnet where other magnets are affected
a region of space in which a magnetic material experiences a force
a region of space where a north magnetic monopole experiences a force
a region of space where magnet experiences a force
a result of a moving electrical field and vice versa
a vector field In mathematics a vector field is a construction in vector calculus which associates a vector to every point in Euclidean space
a vector field it associates magnetic
a vector field it associates with every point in space
a region of space around a magnetized body where magnetic forces are present.
the area around an object that will react with another magnetic object. Planets have magnetic fields about them. These fields interact with the charged particles streaming from the sun. Evidence of this can easily be seen by watching the aurora
The field responsible for magnetic forces, now incorporated along with the electric field, into the electromagnetic field.
The region of space in which a magnetic body exerts its force. Magnetic fields are produced by moving charged particles and represents a force with a definite direction.
The directional force field produced by electric currents which causes a free compass needle to align with it.
The force field produced by an electric current.
Field produced from the flow of current through conductors and increases in strength as the current increases. Magnetic field is measured in units of gauss (G) or tesla (T) (1 T equals 10,000 gauss). The field strength decreases as the distance from the source increases.
The force field around a permanent magnet or a conductor in which is flowing electrical current. It is the magnetic field that is detected by most electromagnetic locators.
the area over which a magnetic force exists, designated by magnetic field lines (see field lines)
A field of force produced by a magnet or electric current.
Around every magnet there is an invisible magnetic field. Magnetism
An area in which a magnetic force can be detected.
a region of space near a magnet, electric current, or moving charged particle in which a magnetic force acts on any other magnet, electric current, or moving charged particle
A term often used to mean the same as magnetic-flux density, also commonly used to mean the same as magnetic-field intensity. The term has no clear definition or pattern of usage.
A state produced in a medium, either by electrical current flow in a conductor or by permanent magnet, that can induce voltage in a second conductor.
region of space around a magnet
a field which traps charged particles (protons and electrons) flowing through space. This constant stream of energized particles emitted by the sun is referred to as the Solar Wind.
All magnetic fields are created by moving electric charge. The single moving electron around a nucleus is a tiny electric current. These orbiting electrons create magnetic fields and their net effect is to provide the atom with a magnetic field.
A modification of the magnetic properties of the space produced by natural magnets or constant electric currents. This is measured in Tesla (T) or more commonly in µT (equal to 10-6 T).
A region of space, around a magnetic body, in which you can detect an appreciable magnetic force.
the region around a magnet in which the magnetic forces act.
the force felt by a unit positive test charge moving through space, due to the influence of magnets or moving charges. Magnetic fields are produced by moving charges.
Magnetic lines of force traveling from the north pole to the south pole of a magnet.
region subject to the influence of magnetism (attraction or rejection)
A region of space that surrounds a moving electrical charge or a magnetic pole, in which the electrical charge or magnetic pole experiences a force that is above the electrostatic ones associated with particles at rest.
A vector field produced by a continuous flow of charge.
The space in which magnetic forces will act on an object or particle. Magnetic fields are represented by magnetic field lines. Magnetic field lines never cross, they go from north to south outside the magnet, and inside they go south to north.
A condition found in the region around a magnet or an electric current, characterized by the existence of a detectable magnetic force at every point in the region and by the existence of magnetic poles.
a region in which magnetic forces can be observed. See "electromagnetic field," a more general field also including electric forces.
The portion of space near a magnetic body or a current carrying body in which the magnetic forces act upon objects.
The magnetic field of the Earth emanates from the iron core. However, the core is far too hot to be a permanent magnet. (If you heat up a bar magnet over about 500 degrees Centigrade it loses it's magnetism. Therefore it is assumed that the churning of the molten iron within the outer core causing movement through a magnetic field, generates electricity within the core. This electicity in turn generates the magnetic field. Each moment the magnetic field is being recreated, and variations in the amount of churning of the iron will cause the magnetic field to start building (more churning = more electricity = stronger magnetic field = even more electricity = even stronger magnetic field) or to collapse. By the way it is created, the magnetic field therefore must be unstable. In historical times the magnetic field has trebled in strength (to 300 AD) and has since reduced by a half. On touching zero it is 50/50 whether the magnetic poles return to where they were or are reversed, with the south magnetic pole in the north. This has happened at least once every million years.
A space around a magnet in which the magnetism can be detected.
A discrete region of twisted bether.
A map of the magnetic forces around any object (such as the sun or planet) that is magnetic. The map is created by measuring the influence of the field on a small magnetic compass. (TOP OF THE PAGE) (CLOSE WINDOW)
The lines of force that exist around an energized electrical conductor, magnet or inductor. Magnetic fields are used when reading and writing data to hard drives, floppy drives and backup tape.
The collection of forces that are produced by electric currents and which are felt by any charged particle that moves.
A field of force that is generated by electric currents. The Sun's average large-scale magnetic field, like that of the Earth, exhibits a north and a south pole linked by lines of magnetic force. more
The force field of magnetic energy that surrounds a magnet. The depth and intensity of this field will depend on the strength of the particular magnet.
A map of the direction and strength of magnetic forces around any object (such as the Sun or planet) that is magnetic. Magnetic fields are caused by electric currents in the Sun.
A field of force around the Sun and the planets, generated by electrical currents, in which a magnetic influence is felt by other currents. The Sun's magnetic field, like that of Earth, exhibits a north and south pole linked by lines of magnetic force. See also: Plasma, the Fourth State of Matter
The property of space having the potential of exerting magnetic forces on bodies within it.
A region of variable force around magnets, magnetic materials, or current-carrying conductors.
A detected force that exists around a magnet or electrical field.
A region of space near a magnetized body where magnetic forces can be detected.
The space influence by magnetic force. The Earth's magnetic field is believed to be generated by the planet's core.
Region around a body in which a magnetic force is detected. Fairly weak magnetic fields are generated by dynamo effects inside planets and moons. Magnetic fields more than one billion times stronger may be generated in stars and galaxies. These are capable of controlling the motion of ionised gas and even the shape of objects.
The area near a planet where magnetic forces can be detected.
The space in which the magnetic force exists.
The Earth's magnetic field is aligned with the north and south poles, and has reversed many times during geologic history. A fossil's magnetic orientation can give clues to its date.
The Earth's magnetic field is aligned with the north and south poles, and has reversed many times during geologic history. Sharks may use the magnetic field of the Earth for navigation purposes on migrations.