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... Force Between two Parallel Currents To find the force on a current– carrying wire due to a second current–carrying wire, first find the field due to the second wire at the site of the first wire. Then find the force on the first wire due to that field. Parallel currents attract, and anti– parallel ...
Chapter 6 Coupling between the ionosphere and the
Chapter 6 Coupling between the ionosphere and the

... field revers direction, that is why it is called the neutral sheet. The cross-tail current continues to a current flowing around the tail surface. It is important to note, that the magnetic field lines connect different magnetospheric regions to different latitudes in the ionosphere. At low and midd ...
Magnetic field generation by sound waves in the solar atmosphere
Magnetic field generation by sound waves in the solar atmosphere

... [this follows immediately from the condition p, .=pi and Eqs. ( 8 ) and ( 9 ) 1. We emphasize also that in deriving Eq. ( 11) we have nowhere used the fact that the perturbations depended harmonically on the coordinate: we can apply Eq. ( 1 1) to any traveling periodic wave, including a wave with a ...
Questions32
Questions32

... (a) Find Bmax(R), the maximum value of the induced magnetic field that occurs at r = R. (b) Plot Bmax(r) for 0 < r < 10 cm. 14. A parallel-plate capacitor with circular plates of radius 0.10 m is being discharged. A circular loop of radius 0.20 m is concentric with the capacitor and halfway between ...
Study Guide Chapt 7: Solid Earth
Study Guide Chapt 7: Solid Earth

... Reflection of seismic waves (wave bouncing off a surface) Refraction of seismic wave (bending caused by changes in wave speed) Earth’s Magnetic field thought to be link to convective fluid motion in liquid outer core. The idea is that when there is an electric current (charge motion) magnetic field ...
Study Guide Chapt 7
Study Guide Chapt 7

... Reflection of seismic waves (wave bouncing off a surface) Refraction of seismic wave (bending caused by changes in wave speed) Earth’s Magnetic field thought to be link to convective fluid motion in liquid outer core. The idea is that when there is an electric current (charge motion) magnetic field ...
sources of hard and soft x-ray emission in solar flares: mhd simulation
sources of hard and soft x-ray emission in solar flares: mhd simulation

... the specially developed finite-difference scheme is used, which is realized in the numerical code PERESVET. According to electrodynamical model the source of soft thermal X-ray emission must appear in the current sheet due to plasma heating at magnetic field dissipation. The source of hard beam X-ra ...
5.14 The magnetospheric ring current. The largest component of the
5.14 The magnetospheric ring current. The largest component of the

... Figure 5.28: A typical magnetic storm as recorded by the Dst index. The solar wind injects charged particles into the ring current, mainly positively charged oxygen ions. Sudden increases in the solar wind associated with coronal mass ejections cause magnetic storms (Figure 5.28), characterized by a ...
CGS
CGS

... EQUATOR CURRENT SYSTEM has a good longitudinal profile ...
Kein Folientitel
Kein Folientitel

... ionospheric origin. The radiation belt lies on dipolar field lines between 2 to 6 RE. ...
< 1 ... 31 32 33 34 35

Ionospheric dynamo region

In the height region between about 85 and 200 km altitude on Earth, the ionospheric plasma is electrically conducting. Atmospheric tidal winds due to differential solar heating or due to gravitational lunar forcing move the ionospheric plasma against the geomagnetic field lines thus generating electric fields and currents just like a dynamo coil moving against magnetic field lines. That region is therefore called ionospheric dynamo region. The magnetic manifestation of these electric currents on the ground can be observed during magnetospheric quiet conditions. They are called Sq-variations (S=solar; q=quiet) and L-variations (L=lunar) of the geomagnetic field.Additional electric currents are generated by the varying magnetospheric electric convection field. These are the DP1-currents (the auroral electrojets) and the polar DP2-currents. Finally, a polar-ring current has been derived from the observations which depends on the polarity of the interplanetary magnetic field. These geomagnetic variations belong to the so-called external part of the geomagnetic field. Their amplitudes reach at most about 1% of the main internal geomagnetic field Bo.
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