中国老太婆bb无套内射-中国美女a级毛片-中国美女一级黄色片-中国猛少妇色xxxxx-中国免费黄色片-中国免费看的片

Knowledge of magnetism

1.Magnetic Field: the space that can produce magnetic force to magnetic pole.

2.Magnetic Field Intensity: (H) magnetic field electrical which was produced by electrical gyroidal winding.Namely,if the unitage length of electrical gyroidal winding is “n” and the passing electric current is “I(A)” then H=I*n.

3.Flux Density (B): the product of vacuum magnetoconductivity (μ)and intensity of magnetic B=μ*H

4.Flux: flux density of unitage area ∮=B*S(“S” is unitage area)

5.Max Energy Product (BH(max)): smallest volume exists most large magnetic power.

6.Coercive Force (Hcb): magnetic field intensity which realize to change the magnetic direction opposite to earlier direction.Namely, if the process is controlled by remove magnetic domain then the power that resist this process called Coercive Force.

7.Residual .Flux Density(Br): magnetic induction intensity(Flux Density) when saturated magnet (including magnetic field which demagnetized by itself)decrease monotonously according to saturated hysteresis curves to zero.

8.Sreface Magnetic Field: appointed palce on permanent magnet.

9.Anisotropic magnet:different crystal has easy or difficult magnetic direction characteristic it attribute to the direction of crystal component.

Mainly magnetics unitage and physical unitage chart

Physical name and notationSI unitConversion formualCGS Gauss systemIA1A=3*10esu VmA1A= GillbertGillbertRm1A/wb=1emuH1A/M=OeBT1T=GSCM∮Mx

*esu is static unitage units *emu is electromagnetic unitage units


主站蜘蛛池模板: 在线播放国产不卡免费视频 | 黄色一级一毛片| 国产高清免费| 欧美一级欧美一级高清| 色福利视频导航| 中文字幕在线视频不卡| 人人看人人添人人谢| 四虎综合| 亚洲怡红院在线观看| 福利视频999| 三级色图| 亚洲一区二区三区四| 欧美香蕉人人人人人人爱| 西西gogo午夜高清大胆| 成年黄网站免费大全毛片| 七月色婷婷| 亚洲瑟瑟网| 欧美中字| 午夜五月天| 国产福利在线观看一区二区| 色wwwww| 51久久| 日日摸夜夜添夜夜添97| 中文字幕在线视频免费观看| 青青在线观看视频| 午夜啪啪网| 毛片在线播| 亚洲成在线观看| 狠狠操夜夜爽| 色老头综合| 大又大又粗又爽女人毛片| 日本一卡2卡3卡四卡精品| 午夜爽爽爽| 免费一级毛片视频| 天堂网bt| 综合久久久| 欧美性猛交ⅹxxx乱大交免费| 亚洲欧美日本视频| 免费a在线看| 亚洲碰碰| 日韩福利在线|