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特斯拉

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特斯拉Tesla,符号表示为T,是磁通量密度国际单位制导出单位。在1960年巴黎召开的国际计量大会上,此单位被命名以纪念在电磁学领域做出重要贡献的美籍塞尔维亚发明家、电子工程师尼古拉·特斯拉。特斯拉用以衡量特定区域通过的总磁通量,因而,减小面积便会增加磁通量密度。

1 T = 1 V · s · m -2 = 1 kg · s -2 · A -1 = 1 N · A -1 m -1 = 1 Wb · m -2

[编辑] 举例

  • 外太空,磁通量密度在0.1到10纳特斯拉之间(10-10 T 到 10-8 T),
  • 地球磁场,50°纬度地区磁密是20 microteslas (2×10-5 T),在赤道0°纬度上,磁密是 31 µT (3.1×10-5 T),
  • in the magnetic field of a huge horseshoe magnet 1 millitesla (0.001 T),
  • a large 30 pound loudspeaker magnet will have a coil gap of 1 T
  • in medical magnetic resonance imaging up to 4 T, experimentally up to 7 T,
  • in a sunspot 10 T,
  • strongest continuous magnetic field yet produced in a laboratory (Florida State University's National High Magnetic Field Laboratory [1] in Tallahassee, USA), 45 T [2],
  • strongest (pulsed) magnetic field yet obtained non-destructively in a laboratory (Koichi Kindo at Osaka University [3]), 80 T,
  • 最强的人造磁场(爆炸产生于俄国Sarov)是2800 T
  • on a neutron star 1 to 100 megateslas (106 T to 108 T),
  • on a magnetar, 0.1 to 100 gigateslas (108 to 1011 T),
  • maximum theoretical field strength for a neutron star, and therefore for any known phenomenon, 1013 T.

Geophysics uses a non-SI unit called the gamma, 1 γ = 10-9 T = 1 nT.

The CGS unit is the gauss = 10-4 T.

[编辑] 国际单位制单位

国际单位制电磁学单位

编辑

名称 符号 量纲 物理量
安培 (国际单位制基本单位) A A 电流
库伦 C A·s 电荷量
伏特 V J/C = kg·m2·s−3·A−1 电压
欧姆 Ω V/A = kg·m2·s−3·A−2 电阻阻抗电抗
欧姆 Ω·m kg·m3·s−3·A−2 电阻率
瓦特 W V·A = kg·m2·s−3 功率
法拉第 F C/V = kg−1·m−2·A2·s4 电容
法拉第 F/m kg−1·m−3·A2·s4 电容率
法拉第 F−1 kg1·m2·A−2·s−4 倒电容
西门子 S Ω−1 = kg−1·m−2·s3·A2 电导, 导纳, 电纳
西门子 S/m kg−1·m−3·s3·A2 电导率
韦伯 Wb V·s = kg·m2·s−2·A−1 磁通量
特斯拉 T Wb/m2 = kg·s−2·A−1 磁通量密度
安培 A/m m−1·A 磁感应强度
安培每韦伯 A/Wb kg−1·m−2·s2·A2 磁阻
亨利 H Wb/A = V·s/A = kg·m2·s−2·A−2 自感
亨利 H/m kg·m·s−2·A−2 磁导率
(无量纲) χ - 磁化率
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