Sentences with phrase «changing magnetic fields in»

Not exact matches

In addition, because part of the inertia of a particle is due to the electromagnetic field around it, as you speed up such a particle the electric field produces a magnetic field, the changing magnetic field produces a back EMF, and this whole reaction of the field produces a resistance to acceleration.

Infrared light is a good probe of the magnetic field because stronger magnetic fields change the way light is emitted in that range.

Although we know that the magnetic field originates in different parts of Earth and that each source generates magnetism of different strengths, exactly how it is generated and why it changes is not fully understood.

A copper coil surrounding the sample detected changes to the superconductor's magnetic properties and allowed the team to sensitively measure tiny variations in how deep the magnetic field reached inside the superconductor.

«We found evidence that these anomalies have happened in the past, and this helps us contextualize the current changes in the magnetic field.»

In 1930, physicists Werner Heisenberg and Hans Heinrich Euler predicted that very strong magnetic fields could change the polarity of light waves in a vacuum (where polarity refers to the orientation of the light's electric and magnetic fieldsIn 1930, physicists Werner Heisenberg and Hans Heinrich Euler predicted that very strong magnetic fields could change the polarity of light waves in a vacuum (where polarity refers to the orientation of the light's electric and magnetic fieldsin a vacuum (where polarity refers to the orientation of the light's electric and magnetic fields).

A major change in the magnetic field would have wide - reaching ramifications; the magnetic field stimulates currents in anything with long wires, including the electrical grid.

In order to put these relatively recent changes into historical perspective, Rochester researchers — led by John Tarduno, a professor and chair of EES — gathered data from sites in southern Africa, which is within the South Atlantic Anomaly, to compile a record of Earth's magnetic field strength over many centurieIn order to put these relatively recent changes into historical perspective, Rochester researchers — led by John Tarduno, a professor and chair of EES — gathered data from sites in southern Africa, which is within the South Atlantic Anomaly, to compile a record of Earth's magnetic field strength over many centuriein southern Africa, which is within the South Atlantic Anomaly, to compile a record of Earth's magnetic field strength over many centuries.

Changes in the magnetic field could therefore cause electrical grid failures, navigation system malfunctions, and satellite breakdowns.

If you provide energy in the form of radio waves, these tiny magnets can switch orientation and give off a resonance frequency that changes predictably based on the strength of the magnetic field.

The record provides historical context to help explain recent, ongoing changes in the magnetic field, most prominently in an area in the Southern Hemisphere known as the South Atlantic Anomaly.

«Our magnetometers (magnetic field sensors) are highly sensitive and can reliably measure even the smallest of changes in the ambient magnetic field,» explains Professor Uwe Hartmann.

The research will help scientists explore how magma moves and track changes in Earth's magnetic field.

The Sun's activity — including changes in the number of sunspots, levels of radiation and ejection of material - varies on an eleven - year cycle, driven by changes in its magnetic field.

It monitors changes in Earth's magnetic field, providing data that help NOAA and the U.S. Air Force track magnetic storms due to solar activity.

The environmental changes in the last 20 years have seen increases in the human environment of petro - chemicals — air transport - quadrupling of motor vehicles, insecticides and rises in background electro - magnetic - field, and so on.»

The researchers used a technique called magnetoencephalography, which detects the firing of neurons as changes in the brain's magnetic field, to monitor the responses of the auditory cortex to the tones.

Zhou's technique uses metal and carbon - based frameworks that change their structure in response to slight changes in temperature, magnetic fields, and light.

His team is currently testing the sensitivity of the new design to changes in magnetic fields, and hoping that this structure could be used for biosensing applications such as MEG.

Diamonds designed with nitrogen - vacancy (NV) centers that can detect changes in magnetic fields are a powerful tool for biosensing technologies and used in the medical detection and diagnosis of disease.

As the craft ploughs deeper into the galaxy, the NASA team will look for an anticipated change in magnetic field direction that would indicate that Voyager 1 is at last clear of all solar influences except gravity, as well as anything that can be gleaned about interstellar space, before we lose contact.

In the 1860s, James Clerk Maxwell developed a theory of electricity and magnetism, describing how changes in an electric field give rise to a magnetic field and vice versIn the 1860s, James Clerk Maxwell developed a theory of electricity and magnetism, describing how changes in an electric field give rise to a magnetic field and vice versin an electric field give rise to a magnetic field and vice versa.

A geomagnetic reversal is a change in the orientation of Earth's magnetic field such that the positions of magnetic north and magnetic south become interchanged.

Magnetic permeability - an intrinsic property of «soft» ferromagnets - is not changed by exposure to a magnetic field, and therefore information stored by programming changes in the magnetic permeability of each memory bit will not be erased by exposure to magneticMagnetic permeability - an intrinsic property of «soft» ferromagnets - is not changed by exposure to a magnetic field, and therefore information stored by programming changes in the magnetic permeability of each memory bit will not be erased by exposure to magneticmagnetic field, and therefore information stored by programming changes in the magnetic permeability of each memory bit will not be erased by exposure to magneticmagnetic permeability of each memory bit will not be erased by exposure to magneticmagnetic fields.

Tweaking the voltage shifts the ions to a different position in the magnetic field, changing their state.

As the crystalline areas have a lower permeability than the amorphous areas, information can be read from the memory by reading the changes in a probe magnetic field.

INEL's system, which should be working by the end of next year, monitors changes in the Earth's magnetic field caused by metal objects passing through it.

«In a classic generator, the current increases linearly with increasing magnetic field strength, which needs to be changing dynamically.

Each ball produced a magnetic field, so that changes in their orientations relative to a guide star, IM Pegasi, could be measured.

But whereas an MRI subjects materials to a magnetic field and measures how the polarity of the atoms in that material change, NDP hits materials with a low - energy neutron beam and counts the different kinds of charged particles that are created when an individual neutron happens to collide with one of the atoms in the test material and annihilates it.

After puzzling it over and practically wallpapering his house with seafloor topography and magnetic field maps, in 1993 Klimley hypothesized that somehow their oblong - shaped heads can sense tiny changes in the magnetic lines created by volcanic lava flows.

When placed in a magnetic field, a power will emerge, which could be measured by changes in the magnitude of tunneling current.

They also ran the experiments under a second, perpendicular magnetic field and were able to observe changes in electron behavior at given field strengths.

Massive changes take place in the magnetic field composition in the area between the solar wind — the stream of energetic particles flowing from the sun — and Earth's magnetic field and this triggers powerful energy transfers.

«We could determine more about how these neutron stars are formed, how they change in time, their magnetic fields — regions of physics that are very poorly understood right now,» he says.

Increasing the magnetic field also induces the skyrmions to change phase relative to one another, from being arranged in ordered arrays like a crystal to randomly distributed and isolated.

The team put monarchs in a flight simulator surrounded by a magnetic coil, measuring responses to horizontal, vertical, and intensity changes in the magnetic field.

When the waves pass through a magnetized region, the polarization changes direction in proportion to the strength of the local magnetic field.

Generally speaking, magnetic fields can be used to change the magnetization of a magnetic material, much like a bar magnet can magnetize an otherwise nonmagnetic sewing needle, and can even reverse its magnetization completely in some cases.

Monarchs, they found, navigate north or south using the change in dip of Earth's magnetic field lines with latitude.

Changes in the atoms» spin rate correspond to an oscillation in the DC magnetic fields, creating alternating current (AC) electronic signals, or voltages at the light detector, which are more useful for communications.

To monitor the movements of the cats, Williams and their colleagues developed collars equipped with GPS and devices that measure changes in acceleration and magnetic fields.

The change in electrical resistance through a magnetic field is called magnetoresistance and is very important in technology.

The patterns of the changes in magnetic field strength over 48 hours seen in these two events were so similar to those recorded in a ground sensor during the Carrington event that the first event must not have been global in its reach either, the team reports in the Journal of Space Weather and Space Climate.

«It's an opportunity for us to study changes in the Sun which will give us newer insights into the origin of the solar wind and its relation to the solar magnetic field,» says Ed Smith, NASA Ulysses project scientist.

Magnetic fields of different strengths make those electrons spiral in particular ways, and that spiraling changes the orientation of the light as it travels toward Earth.

Physicists at the U.S. Department of Energy's Ames Laboratory compared similar materials and returned to a long - established rule of electron movement in their quest to explain the phenomenon of extremely large magnetoresistance (XMR), in which the application of a magnetic field to a material results in a remarkably large change in electrical resistance.

Out in the real world, they are quickly overwhelmed by background noise as minuscule as changes in Earth's magnetic field caused by distant solar storms.

As the bar is crushed or bent, these magnetic domains shift positions with respect to each other and scientists can detect the associated changes in the bar's magnetic field.

The magnetic field emitted by it is thus changed, which in turn influences the second mini magnet.