Magnetic fields with downward curvature are not favourable for prominence formation since the presence of a small quantity of dense material at the summit of a low-beta arcade cannot deform sufficiently the magnetic field lines to remain there in a stable manner. Thus a dip at the field line ...
Most MRI systems use a superconducting magnet, which consists of many coils or windings of wire through which a current of electricity is passed, creating a magnetic field of up to 2.0 tesla. Maintaining such a large magnetic field requires a good deal of energy, which is accomplished by supe...
Magnetic field lines circulate through the magnetic material from the north and south pole, forming a sphere. Where the magnetic field is strongest,...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough ...
How does solar energy affect the hydrosphere? How does the Sun's magnetic field affect its surface features? How does radiant energy from the sun affect air currents? How is wind energy a form of solar energy? How is solar energy stored in the biosphere?
a magnetic field that does not run parallel to the direction of the current. When there is a magnetic field present, the electrons (or their opposite, electron holes, or both) in the current gather on one side of the conductive material. When it is absent, the electrons or holes run in...
In an unmagnetized ferromagnetic material, each domain's north pole points in a random direction. Magnetic domains that are oriented in opposite directions cancel one another out, so the material does not produce a net magnetic field. In magnets, on the other hand, most or all the magnetic ...
A current is introduced, either from a battery or another source of electricity, and flows through the wire. This creates a magnetic field around the coiled wire, magnetizing the metal as if it were a permanent magnet. Electromagnets are useful because you can turn the magnet on and off by...
Hall Effect sensors are based on the “Hall Effect”, named after Edwin Hall, where current flow through a semiconductor placed perpendicular to a magnetic field will generate a voltage potential across the semiconductor material. For the purposes of current measurement, Hall Effect circuitry is plac...
When the coil is energized, the induced magnetic field moves the armature that opens or closes the contacts. See Figure 1. Figure 1: Electromechanical relay: Current through the coil creates a magnetic field that moves the armature between the contacts Electromechanical relays support a wide range...
How does ALMA work? Where is ALMA? ALMA's top discoveries The distance record for oxygen molecules Images of protoplanetary disks Images of black holes An ancient magnetic field Chemistry of life Additional resources The Atacama Large Millimeter/submillimeter Array (ALMA) is a collectio...