工程电磁场第八版课后答案第09章.pdfVIP

  1. 1、有哪些信誉好的足球投注网站(book118)网站文档一经付费(服务费),不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。。
  2. 2、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。如您付费,意味着您自己接受本站规则且自行承担风险,本站不退款、不进行额外附加服务;查看《如何避免下载的几个坑》。如果您已付费下载过本站文档,您可以点击 这里二次下载
  3. 3、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“版权申诉”(推荐),也可以打举报电话:400-050-0827(电话支持时间:9:00-18:30)。
  4. 4、该文档为VIP文档,如果想要下载,成为VIP会员后,下载免费。
  5. 5、成为VIP后,下载本文档将扣除1次下载权益。下载后,不支持退款、换文档。如有疑问请联系我们
  6. 6、成为VIP后,您将拥有八大权益,权益包括:VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
  7. 7、VIP文档为合作方或网友上传,每下载1次, 网站将根据用户上传文档的质量评分、类型等,对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档
查看更多
CHAPTER 9 9.1. In Fig. 9.4, let B = 0.2 cos 120⇡t T, and assume that the conductor joining the two ends of the resistor is perfect. It may be assumed that the magnetic field produced by I (t) is negligible. Find: 2 a) Vab (t): Since B is constant over the loop area, the flux is = ⇡ (0.15) B = 1.41 ⇥ 102 cos 120⇡t Wb. Now, emf = Vba (t) = d/dt = (120⇡)(1.41 ⇥ 102 ) sin 120⇡t. Then Vab (t) = Vba (t) = 5.33 sin 120⇡t V. b) I (t) = Vba (t)/R = 5.33 sin(120⇡t)/250 = 21.3 sin(120⇡t) mA 9.2. In the example described by Fig. 9.1, replace the constant magnetic flux density by the time- varying quantity B = B0 sin !t az . Assume that v is constant and that the displacement y of the bar is zero at t = 0. Find the emf at any time, t. The magnetic flux through the loop area is = Z B · dS = Z vt Z d B sin !t (a · a ) dx dy = B v t d sin !t m 0 z z 0 s 0 0 Then the emf is emf = I E · dL = dm = B0 d v [sin !t + !t cos !t] V dt 8 9.3. Given H = 300 az cos(3 ⇥ 10 t y) A/m in free space, find the emf developed in the general a direction about the closed path having corners at a) (0,0,0), (1,0,0), (1,1,0), and (0,1,0): The magnetic flux will be: Z 1 Z 1 8 8 1 = 300µ0 cos(3 ⇥ 10 t y) dx dy = 300µ0 sin(3 ⇥ 10 t y)|0 0 0 ⇥

文档评论(0)

annylsq + 关注
实名认证
文档贡献者

该用户很懒,什么也没介绍

1亿VIP精品文档

相关文档