نتایج جستجو برای: electric charge

تعداد نتایج: 272923  

2014
Kazuya KIKUNAGA Hiroshi YAMASHITA Masahiro EGASHIRA Kazuhiro NONAKA

Electric field induced by charge oscillation has been investigated by simulation of the electric field distribution using the finite-difference frequency-domain method. In addition, the electric field was induced by spatial oscillation of a sample to which a DC voltage was applied. The simulation and evaluation of the electric field verified that the efficiency for inducing the electric field h...

Abstract: In order to improve the thermal management system for cooling an electric vehicle battery pack, the thermal performance of the battery pack in two states of charge and discharge in different working conditions by using a copper sheath around the batteries and a copper sheath, as well as a stair channel on top of the battery pack and using of nanofluid as cooling fluid, has been studie...

2014

Field Due to an Electric Dipole An electric dipole consists of two particles with charges of equal magnitude q but opposite sign, separated by a small distance d. Their electric dipole moment has magnitude qd and points from the negative charge to the positive charge. The magnitude of the electric field set up by the dipole at a distant point on the dipole axis (which runs through both charges) is

2005
R. A. B. Devine J. W. Tringe J. R. Chavez

Radiation-induced charge trapping has been studied in cured hydrogen silsesquioxane low dielectric constant films subjected to electric fields during the radiation process. Evidence is found for electric field-dependent negative charge trapping with a dose 47 variation. The possible origin of the negative charge trapping is discussed.

2010
Jingbo Li Steven Cummer

[1] Measurements of very low frequency radio emissions indicate that substantial electric current flows inside some sprites. This charge motion, with presently unknown location and distribution, is related to the detailed internal microphysics of sprite development that is in turn connected to the impact sprites have on the mesosphere. Assuming that sprite streamers propagate along the directio...

2004
Arlen Cox

When electric potential is applied to conductors an electric field is created, which in turn creates arbitrary potentials between conductors. This is a study of the potential, electric field and charge involved in conductors. This also discusses capacitance of arbitrary conductors and how that is related to charge. Specifically this will discuss a concentric square cylinder capacitor like that ...

1999
Don J. Latham

Ž . Plume clouds resulting from wildland fires pyrocumulus sometimes produce lightning discharges to ground. These discharges were found to carry positive charge to ground exclusively in several cases. Emission of space charge was observed from woody materials burned in the presence of an external electric field. Measurements done in a large wind tunnel for this study confirm and extend measure...

Journal: :فیزیک زمین و فضا 0
نفیسه پگاه فر استادیار، پژوهشکده علوم جوّی، پژوهشگاه ملی اقیانوس شناسی و علوم جوّی، تهران، ایران مریم قرایلو استادیار، گروه فیزیک فضا، موسسه ژئوفیزیک دانشگاه تهران، ایران

results of numerical simulation of intra-cloud electrification depend on a mechanism that determines the sign and magnitude of charge transferred to hydrometeors (including graupels and ice crystals), through their collision (mansell et al., 2005). some of the microphysical processes play an important role in the above mechanism. in order to estimate the amount and sign of the transmitted charg...

Charging electric vehicles in the distribution network is one of the most basic solutions for technical and economic management of energy distribution. In many traditional charging methods, the condition of fully charging cars when leaving the parking lot has always been a problem. But in this article, each car is intelligently charged only based on the amount of energy required to travel its d...

Journal: :Physical Review D 2011

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