Flux penetration into flat superconductors of arbitrary shape
... surrounding the flux-free region in which both H50 and E50. One has also J50 in this region in the longitudinal geometry, but J(x,y) is finite over the entire area of the specimen in perpendicular geometry.55,57 However, since J(x,y),J c in the flux-free region, one has E(x,y)50 in this region becau ...
... surrounding the flux-free region in which both H50 and E50. One has also J50 in this region in the longitudinal geometry, but J(x,y) is finite over the entire area of the specimen in perpendicular geometry.55,57 However, since J(x,y),J c in the flux-free region, one has E(x,y)50 in this region becau ...
Electromagnetic Fields
... The fact that the gauge transformation function does not satisfy the homogeneous wave equation is coupled to the fact that Maxwell’s equations require an external source for the length gauge. This means that external energy can be pumped into a system, unlike the plane wave where no sources exist. ...
... The fact that the gauge transformation function does not satisfy the homogeneous wave equation is coupled to the fact that Maxwell’s equations require an external source for the length gauge. This means that external energy can be pumped into a system, unlike the plane wave where no sources exist. ...
Chapter 10 Time-Varying Fields and Maxwell`s Equations
... establish a flux within the circular loop in the negative az direction. Since E increases exponentially with time, the current and flux do also, and thus tend to reduce the time rate of increase of the applied flux and the resultant emf in accordance with Lenz's law. Before leaving this example, it ...
... establish a flux within the circular loop in the negative az direction. Since E increases exponentially with time, the current and flux do also, and thus tend to reduce the time rate of increase of the applied flux and the resultant emf in accordance with Lenz's law. Before leaving this example, it ...
Sub-femtotesla scalar atomic magnetometer using multipass cells
... most sensitive detectors of magnetic field, reaching sensitivity below 1 fT/Hz1/2 [1, 2], but only if they are operated near zero magnetic field to eliminate spin relaxation due to spin-exchange collisions [3, 4]. Many magnetometer applications, such as searches for permanent electric dipole moments ...
... most sensitive detectors of magnetic field, reaching sensitivity below 1 fT/Hz1/2 [1, 2], but only if they are operated near zero magnetic field to eliminate spin relaxation due to spin-exchange collisions [3, 4]. Many magnetometer applications, such as searches for permanent electric dipole moments ...
Document
... like optical waves since they travel in straight line. 3. Microwave currents flow through a thin outer layer of an ordinary cable. 4. Microwaves are easily attenuated within short distances. 5. They are not reflected by ionosphere PH0101 ...
... like optical waves since they travel in straight line. 3. Microwave currents flow through a thin outer layer of an ordinary cable. 4. Microwaves are easily attenuated within short distances. 5. They are not reflected by ionosphere PH0101 ...
fiitjee aieee class room program
... enters a region where a magnetic field of induction B is along the y –axis, and an electric field of induction B is along the y-axis, and an electric field of magnitude 104 V/m is along the negative z-axis. If the charged particle continues moving along the x-axis, the magnitude of B is (A) 103 Wb/m ...
... enters a region where a magnetic field of induction B is along the y –axis, and an electric field of induction B is along the y-axis, and an electric field of magnitude 104 V/m is along the negative z-axis. If the charged particle continues moving along the x-axis, the magnitude of B is (A) 103 Wb/m ...
Van de Graff Generator
... • Electric fields exists around any conductor or insulator that contains a charge. • The electric field intensity is a measure of the force on a test charge placed in the field. • The strength of the field is proportional to the density of field lines. • Field lines are perpendicular to all charged ...
... • Electric fields exists around any conductor or insulator that contains a charge. • The electric field intensity is a measure of the force on a test charge placed in the field. • The strength of the field is proportional to the density of field lines. • Field lines are perpendicular to all charged ...
Parallel Permittivity Elements for Radio Frequency Waves in
... As is well known, tokamaks represent a promising route to magnetic thermonuclear fusion. In order to achieve the burning conditions in these devices additional plasma heating must be employed. Effective schemes of heating and current drive in magnetized plasmas can be realized using the collisionles ...
... As is well known, tokamaks represent a promising route to magnetic thermonuclear fusion. In order to achieve the burning conditions in these devices additional plasma heating must be employed. Effective schemes of heating and current drive in magnetized plasmas can be realized using the collisionles ...
Electromagnet
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet.The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.Electromagnets are widely used as components of other electrical devices, such as motors, generators, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment. Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel.