Then this atom of calcium will swell to something like a great balloon a hundred yards across, a balloon big enough to put a football field inside.

The flag has a white field, with a red Latin cross inside a blue canton.

Instead, they cause electromagnetic field behavior that only efficiently transfers power to a receiver very close to the source, such as the magnetic induction inside an electrical transformer, or the feedback behavior that happens close to the coil of a metal detector.

The field is therefore zero at all places inside the body.

In 1956, the German-American physicist Friedwardt Winterberg proposed a test of general relativity ( for time slowing in a strong gravitational field ) using accurate atomic clocks placed in orbit inside artificial satellites.

West Germany took the lead through Helmut Haller early on, but six minutes later Moore was fouled just inside the German half of the field.

He became known in the 1990s for his research on the use of genetic algorithms to evolve neural networks using three dimensional cellular automata inside field programmable gate arrays.

When the current flowing through an inductor changes, creating a time-varying magnetic field inside the coil, a voltage is induced, according to Faraday's law of electromagnetic induction, which by Lenz's law opposes the change in current that created it.

It reduces the Earth's magnetic field inside by about 1500 times.

So mu-metal shields are often made of several enclosures one inside the other, each of which successively reduces the field inside it.

When a person is inside the powerful magnetic field of the scanner, the average magnetic moment of many protons becomes aligned with the direction of the field.

# The field confining the Earth's plasma and magnetic field inside the magnetospheric cavity.

There, the bones of St. James the Great were proclaimed to have been found in Compostela ( from Latin campus stellae, literally " the star field ") inside Galicia.

The switch has a set of contacts inside an evacuated or inert gas-filled glass tube which protects the contacts against atmospheric corrosion ; the contacts are made of magnetic material that makes them move under the influence of the field of the enclosing solenoid.

By using the London equation, one can obtain the dependence of the magnetic field inside the superconductor on the distance to the surface.

However, instead of attempting to return the ball, Renfro let it bounce inside his own 1-yard line where it was downed by center Tom Goode ( NFL rules prior to 1974 allowed a field goal that fall short of the goal posts to be downed just like a punt ).

In contrast, the Rams were able to reach inside the Tennessee 20-yard line on all 4 of their remaining drives before halftime, but on each one, the Titans defense forced St. Louis to settle for field goal attempts from kicker Jeff Wilkins, who was successful in making 3 of them, but missed one attempt from 34 yards.

* Courses: attendees learn from the experts in the field and gain inside knowledge that is critical to career advancement.

Large trays of grass would be grown and cultivated outdoors, then brought inside the dome and placed on the field of play.

This leads to a weaker field on the outside than the inside.

In the serial " The War Games ," the Time Lords manage to breach the inside of the TARDIS while in mid-flight and landing in order to erect something similar to a force field.

In a tokamak, the toroidal field is produced by electromagnets that surround the torus, and the poloidal field is the result of a toroidal electric current that flows inside the plasma.

The magnetic field around the wire carrying current to be measured deflects the moving magnet.

# A current is induced in a loop of wire when it is moved towards or away from a magnetic field, or a magnet is moved towards or away from it, the direction of current depending on that of the movement.

Ørsted did not fully understand his discovery, but he observed the effect was reciprocal: a current exerts a force on a magnet, and a magnetic field exerts a force on a current.

The domains will remain aligned when the external field is removed, creating a magnetic field of their own extending into the space around the material, thus creating a " permanent " magnet.

An MRI scanner is a device in which the patient lies within a large, powerful magnet where the magnetic field is used to align the magnetization of some atomic nuclei in the body, and radio frequency fields to systematically alter the alignment of this magnetization.

These fields, generated by passing electric currents through gradient coils, make the magnetic field strength vary depending on the position within the magnet.

This magnet creates a very strong magnetic field which varies in uniformity by as much as 40 %.

A second much weaker ( only requiring the electric power necessary to run two hairdryers ) but far more precise magnet then creates a homogeneous magnetic field.

Because the magnetic field is " tuned " by the second magnet, a PMRI scan can be obtained immediately adjacent to a metal prosthetic, unlike an MRI scan.

In a hard magnet such as a ferromagnet, is not proportional to the field and is generally nonzero even when is zero ( see Remanence ).

This aspect of electromagnetic induction is the operating principle behind many electric generators: for example, a rotating bar magnet creates a changing magnetic field, which in turn generates an electric field in a nearby wire.

Its major part resembles the field of a bar magnet (" dipole field ") inclined by about 10 ° to the rotation axis of Earth, but more complex parts (" higher harmonics ") also exist, as first shown by Carl Friedrich Gauss.

The magnet producing a field parallel to the long axis of the device is not shown. A similar magnetron with a different section removed.

A magnetic field parallel to the filament is imposed by a permanent magnet.

Flexible plate is used in electric motor and generator armatures, field coil insulation, and magnet and commutator commutator core insulation.

That is, they form a magnet in the presence of a magnetic field — because of the spin magnetic moments of the unpaired electrons in the molecule, and the negative exchange energy between neighboring molecules.

Persistent electric current flows on the surface of the superconductor, acting to exclude the magnetic field of the magnet ( Faraday's law of induction ).

Also, we can see that the LTSC torus maximum diameter is always smaller for a HTSC magnet than LTSC due to higher magnetic field operation.

Tokamak magnet field and current

Some used a liquid transmitter, some had a metal diaphragm that induced current in an electromagnet wound around a permanent magnet, and some were " dynamic "-their diaphragm vibrated a coil of wire in the field of a permanent magnet or the coil vibrated the diaphragm.

Magnetic field of an ideal cylindrical magnet with its axis of symmetry inside the image plane.