Chapter 19
... holding a bar magnet that is free to rotate in three dimensions, which direction will the south pole of the magnet point? A. straight up B. straight down C. parallel to the ground, toward the north D. parallel to the ground, toward the south ...
... holding a bar magnet that is free to rotate in three dimensions, which direction will the south pole of the magnet point? A. straight up B. straight down C. parallel to the ground, toward the north D. parallel to the ground, toward the south ...
d. Induced emf due to a triangular variation in the magnetic field
... We’ll show that the solenoid is long enough that the field along its central axis and near its center is uniform in magnitude and direction. The field in this central region is given by Equation 1 where B is the magnitude of the magnetic field in telsa, μo = 4π × 10-7 T∙ m/A is the permeability of f ...
... We’ll show that the solenoid is long enough that the field along its central axis and near its center is uniform in magnitude and direction. The field in this central region is given by Equation 1 where B is the magnitude of the magnetic field in telsa, μo = 4π × 10-7 T∙ m/A is the permeability of f ...
MHD toy model of the solar radiative zone
... is constant along magnetic field lines. If the field within the radiative zone has an “open” configuration, the magnetic field lines connected with the convective zone would transfer the differential rotation into the radiative zone; we shall call this a differentially rotating Ferraro state. On the ...
... is constant along magnetic field lines. If the field within the radiative zone has an “open” configuration, the magnetic field lines connected with the convective zone would transfer the differential rotation into the radiative zone; we shall call this a differentially rotating Ferraro state. On the ...
Calculus constructions
... straight out radially from the charge and crossing a spherical surface. If you count up all the lines crossing the surface, you get the same number, regardless of the size of the sphere, and the number of lines is conventionally proportional to the charge at the center. This leads to Gauss’s Law. Fo ...
... straight out radially from the charge and crossing a spherical surface. If you count up all the lines crossing the surface, you get the same number, regardless of the size of the sphere, and the number of lines is conventionally proportional to the charge at the center. This leads to Gauss’s Law. Fo ...
The fourth quadrant in the epsilon-mu plane: A new frontier in Optics
... field; the magnetic component of the EM field does not produce usually an appreciable response. This is so because the force exercised on a charged particle by the magnetic component of the field is of the order / c relative to that of the electric component, where is the velocity of the particl ...
... field; the magnetic component of the EM field does not produce usually an appreciable response. This is so because the force exercised on a charged particle by the magnetic component of the field is of the order / c relative to that of the electric component, where is the velocity of the particl ...
Reduction of the Multipactor Threshold Due to Electron Cyclotron
... electrons, the multipactor avalanche grows which results in a number of undesirable effects such as generation of electromagnetic noise, impedance mismatch, extra heating of the system and even hardware damage. Therefore, correct predictions of the multipactor threshold become a necessary prerequisi ...
... electrons, the multipactor avalanche grows which results in a number of undesirable effects such as generation of electromagnetic noise, impedance mismatch, extra heating of the system and even hardware damage. Therefore, correct predictions of the multipactor threshold become a necessary prerequisi ...
Magnetic Mysteries
... now seems much stronger than before. The magnet is much stronger along its length, not its width. In fact, when the magnet is placed on a metal surface along its width, it appears weaker, except for the outer most edges. e. Have your students use the magnetic field viewing film again to see that alt ...
... now seems much stronger than before. The magnet is much stronger along its length, not its width. In fact, when the magnet is placed on a metal surface along its width, it appears weaker, except for the outer most edges. e. Have your students use the magnetic field viewing film again to see that alt ...
QUANTIZED MAGNETIC FLUX IN BOHR
... Instead of interpretating the energy shifts of atomic levels due to the Zeeman effect, Paschen-Back effect and the hyperfine level splitting as the additional energy of a magnetic moment within a magnetic field, these effects are here considered to be the result of the quantization of the magnetic f ...
... Instead of interpretating the energy shifts of atomic levels due to the Zeeman effect, Paschen-Back effect and the hyperfine level splitting as the additional energy of a magnetic moment within a magnetic field, these effects are here considered to be the result of the quantization of the magnetic f ...
Resolving Spin-Orbit- and Hyperfine
... steps down to 1 mT, well below the 5–10 mT linewidth typically observed in GaAs quantum dots due to the (1–2 mT rms) distribution of nuclear fields [5,10,24]. Based on the geometry, we expect the alternating field to be mostly along [110], so the Dresselhaus and Rashba contributions to the spin-orbi ...
... steps down to 1 mT, well below the 5–10 mT linewidth typically observed in GaAs quantum dots due to the (1–2 mT rms) distribution of nuclear fields [5,10,24]. Based on the geometry, we expect the alternating field to be mostly along [110], so the Dresselhaus and Rashba contributions to the spin-orbi ...
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.