A VISUAL TOUR OF CLASSICAL ELECTROMAGNETISM
... the vector at every point in space represents a direction of motion of a fluid element, and we can construct animations of those fields, as above, which show that motion. A more general vector field, for example the electric and magnetic fields discussed below, do not have that immediate physical in ...
... the vector at every point in space represents a direction of motion of a fluid element, and we can construct animations of those fields, as above, which show that motion. A more general vector field, for example the electric and magnetic fields discussed below, do not have that immediate physical in ...
The nature of Petschek-type reconnection T. G. Forbes
... where Rme and V Ae are the magnetic Reynolds number and Alfvén speed in the region far upstream of the current sheet. Because of its logarithmic dependence on Rme , the Petschek reconnection rate is many orders of magnitude greater than the Sweet-Parker rate, and for most space and laboratory appli ...
... where Rme and V Ae are the magnetic Reynolds number and Alfvén speed in the region far upstream of the current sheet. Because of its logarithmic dependence on Rme , the Petschek reconnection rate is many orders of magnitude greater than the Sweet-Parker rate, and for most space and laboratory appli ...
II. The induced emf in a coil in a varying magnetic field.
... 2. Sketch the resulting B vs. t graph on the grid below. There should be one obvious maximum and two approximately equal minimum points or line segments on your graph. Label these three using Bmax and Bmin and include the magnitude of the magnetic field at each location in Gauss. Use the Graph Tool ...
... 2. Sketch the resulting B vs. t graph on the grid below. There should be one obvious maximum and two approximately equal minimum points or line segments on your graph. Label these three using Bmax and Bmin and include the magnitude of the magnetic field at each location in Gauss. Use the Graph Tool ...
IOSR Journal of Applied Physics (IOSR-JAP) ISSN: 2278-4861.
... fields. Then the particle beam by a force acts. The particle and the planet, etc., is known as the gravitational force. The forces present in the beam direction of rotation electron has come. Seem to spin and electron. Which is published in the beam generated electromagnetic torque. Published beam a ...
... fields. Then the particle beam by a force acts. The particle and the planet, etc., is known as the gravitational force. The forces present in the beam direction of rotation electron has come. Seem to spin and electron. Which is published in the beam generated electromagnetic torque. Published beam a ...
current helicity of active regions as a tracer of large
... play different roles. Considering the small-scale velocity and magnetic fluctuations, u and b, respectively, there are three helicities: (1) the kinetic helicity Hu = u·curl u that determines the kinetic α effect; (2) the current helicity Hc = b·curl b that determines the magnetic part of the α ...
... play different roles. Considering the small-scale velocity and magnetic fluctuations, u and b, respectively, there are three helicities: (1) the kinetic helicity Hu = u·curl u that determines the kinetic α effect; (2) the current helicity Hc = b·curl b that determines the magnetic part of the α ...
Zonal Flows and Fields Generated by Turbulence in CHS
... phases, A, C and E. The results indicate clear changes in the coupling between waves according to the phase of the zonal flow. The most important feature is that the couplings become stronger along the lines of f1+f2~0.5, -0.5 kHz at the phases A (maximum) or E (minimum). The expanded views of a reg ...
... phases, A, C and E. The results indicate clear changes in the coupling between waves according to the phase of the zonal flow. The most important feature is that the couplings become stronger along the lines of f1+f2~0.5, -0.5 kHz at the phases A (maximum) or E (minimum). The expanded views of a reg ...
Magnetic field
A magnetic field is the magnetic effect of electric currents and magnetic materials. The magnetic field at any given point is specified by both a direction and a magnitude (or strength); as such it is a vector field. The term is used for two distinct but closely related fields denoted by the symbols B and H, where H is measured in units of amperes per meter (symbol: A·m−1 or A/m) in the SI. B is measured in teslas (symbol:T) and newtons per meter per ampere (symbol: N·m−1·A−1 or N/(m·A)) in the SI. B is most commonly defined in terms of the Lorentz force it exerts on moving electric charges.Magnetic fields can be produced by moving electric charges and the intrinsic magnetic moments of elementary particles associated with a fundamental quantum property, their spin. In special relativity, electric and magnetic fields are two interrelated aspects of a single object, called the electromagnetic tensor; the split of this tensor into electric and magnetic fields depends on the relative velocity of the observer and charge. In quantum physics, the electromagnetic field is quantized and electromagnetic interactions result from the exchange of photons.In everyday life, magnetic fields are most often encountered as a force created by permanent magnets, which pull on ferromagnetic materials such as iron, cobalt, or nickel, and attract or repel other magnets. Magnetic fields are widely used throughout modern technology, particularly in electrical engineering and electromechanics. The Earth produces its own magnetic field, which is important in navigation, and it shields the Earth's atmosphere from solar wind. Rotating magnetic fields are used in both electric motors and generators. Magnetic forces give information about the charge carriers in a material through the Hall effect. The interaction of magnetic fields in electric devices such as transformers is studied in the discipline of magnetic circuits.