37 A uniform magnetic field (parallel to the plane of paper) exists in space initially in a direction from left to right. Which of the following diagrams A, B, C or D shows the change in the magnetic field when a piece of soft iron bar is placed in the region of the field? B AC...
For example, when the first astronauts returned to earth sick, NASA concluded that their illness resulted from the lack of a planetary magnetic field in outer space. To resolve the problem, NASA placed magnets in the astronauts’ space suits and space travel vehicles, and astronauts have ...
A magnetic field generating device for use in MRI having a pair of pole pieces opposed at a space to each other and generating a magnetic field in the space, wherein the pole piece has a laminate structure in which a soft ferrite and a m... S Okada,M Aoki,S Hashimoto - US 被引量...
磁重联(magnetic reconnection),或磁力线重联(magnetic field line reconnection),又称磁场湮灭,是天体物理中一种非常重要的快速能量释放过程,也是磁能转化为粒子的动能、热能和辐射能的过程。普遍认为太阳上的能量释放就是磁重联导致的。[1] 磁重联,取描述磁力线“断开”(break)再“重新连接”(reconnect)的物理过程...
magnetic field noun a region of space near a magnet, electric current, or moving charged particle in which a magnetic force acts on any other magnet, electric current, or moving charged particle. magnetic intensity.Discover More Word History and Origins Origin of magnetic field1 First recorded in...
The meaning of MAGNETIC FIELD is the portion of space near a magnetic body or a current-carrying body in which the magnetic forces due to the body or current can be detected. How to use magnetic field in a sentence.
Magnetic field, a vector field in the neighborhood of a magnet, electric current, or changing electric field, in which magnetic forces are observable. Magnetic fields such as that of Earth cause magnetic compass needles and other permanent magnets to lin
LOS ANGELES, May 21 (Xinhua) -- Jupiter's internal magnetic field is changing over time, a phenomenon observed by the U.S. National Aeronautics and Space Administration (NASA) for the first time outside of the Earth, the agency has said. ...
关键词: Magnetic Field Configurations Magnetic Moments Mars Probes Planetary Magnetic Fields Spacecraft Instruments Bow Waves Magnetometers Phobos Shock Waves Solar Planetary Interactions DOI: 10.1038/341604a0 被引量: 262 年份: 1989 收藏 引用 批量引用 报错 分享 全部来源 免费下载 求助全文 Nature Nature...
Energy flux determines magnetic field strength of planets and stars. Nature 457, 167–169 (2009). Article ADS Google Scholar Morin, J., Hill, C. A. & Watson, C. A. in Astronomy at High Angular Resolution Vol. 439 (eds Boffin, H. M. J. et al.) 223 (Astrophysics and Space ...