论文部分内容阅读
稳恒电路中有内外电压之别,在电磁感应类习题中也会出现类似问题,因综合较强而极易出错,现例举1两例。如图1所示,导线ab、cd跨在电阻不计,间距为L的长直光滑导轨上,当cd在外力F1作用下匀速向右滑动时,ab在外力F2作用下保持静止,则两力及导线两端电压的大小关系是F1F2、UabUcd。
There are differences between internal and external voltages in a stable circuit. Similar problems may occur in electromagnetic induction exercises. Because the synthesis is strong and it is prone to errors, two examples are now given. As shown in Figure 1, the wires ab and cd straddle a long, straight, smooth rail with no resistance and the distance L. When cd slides to the right at a constant speed under the action of external force F1, ab remains stationary under the action of external force F2. The magnitude of the voltage across the wire is F1F2, UabUcd.