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麻烦各位大神帮忙把这几段科技英文翻译成中文.拜托了1)Intheearly1830s,MichaelFaradayinEnglandandJosephHenryinAmericanindependentlydiscoveredthatachangingmagneticfieldinducesacurrentinawire.Thetwoexp
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麻烦各位大神帮忙把这几段科技英文翻译成中文.拜托了
1) In the early 1830s, Michael Faraday in England andJoseph Henry in American independently discovered that a changing magneticfield induces a current in a wire. The two experiments shown in Fig. 17-1 haveone thing in common. In both cases, an emf is induced in a circuit when themagnetic flux through the circuit changes with time. The emfs and currentscaused by changing magnetic fields are called induced emfs and inducedcurrents. The process itself is referred to as magnetic induction.
2) When you pull the plug of an electric cord fromits socket, you sometimes observe a small spark. Before the cord isdisconnected, it carries a current, which produces a magnetic field encirclingthe current. When the cord is disconnected, the current abruptly ceases and themagnetic field around it collapses. The changing magnetic field produces an emfthat tries to main the original current, resulting in a spark across the plug.Once the magnetic field reaches zero it is no longer changing, and the emf iszero.
1) In the early 1830s, Michael Faraday in England andJoseph Henry in American independently discovered that a changing magneticfield induces a current in a wire. The two experiments shown in Fig. 17-1 haveone thing in common. In both cases, an emf is induced in a circuit when themagnetic flux through the circuit changes with time. The emfs and currentscaused by changing magnetic fields are called induced emfs and inducedcurrents. The process itself is referred to as magnetic induction.
2) When you pull the plug of an electric cord fromits socket, you sometimes observe a small spark. Before the cord isdisconnected, it carries a current, which produces a magnetic field encirclingthe current. When the cord is disconnected, the current abruptly ceases and themagnetic field around it collapses. The changing magnetic field produces an emfthat tries to main the original current, resulting in a spark across the plug.Once the magnetic field reaches zero it is no longer changing, and the emf iszero.
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答案和解析
1)十九世纪30年代初期,英国的迈克尔·法拉第与美国的约瑟夫·亨利各自发现了在变化的磁场中,金属线产生了电流.这两个实验如图17-1所示,两者的共同点就是通过磁场的闭合回路在磁场发生变化时,该电路中便感应出电动势.这个由变化的磁场感应产生的电动势和电流就叫做感应电势和感应电流,而这一过程本身也被定义为磁场感应.
2)当你从插座上拉动一根塞在插片里的电线时,就在电线脱离之前,有时你会观察到一些小火花.那是一些产生环绕电流的的磁场的带电体.当电线完全脱离插片后,这个带电体立即消失的同时环绕其周围的磁场也一并消失了.变化磁场产生的电动势试图产生一个初始电流,导致了插片四周产生了一些火花.一旦磁场变成零它就不再变化,随即电动势也变成了零.
2)当你从插座上拉动一根塞在插片里的电线时,就在电线脱离之前,有时你会观察到一些小火花.那是一些产生环绕电流的的磁场的带电体.当电线完全脱离插片后,这个带电体立即消失的同时环绕其周围的磁场也一并消失了.变化磁场产生的电动势试图产生一个初始电流,导致了插片四周产生了一些火花.一旦磁场变成零它就不再变化,随即电动势也变成了零.
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