本题目来源于试卷: DC Circuits，类别为 IB物理学
[问答题]
What would happen if you mistake nwlr3q/kt)qs )ba78nnly used 9n 8;yb zzdz.fan ammeter where you needed to use a voltmetzz9nfdb8 ;.yz er?
参考答案:
If you mistakenly use an
ammeter where you intend to use a voltmeter, you are inserting a short in
parallel with some resistance. That
means that the resistance of the entire circuit has been lowered, and all of
the current will flow through the low-resistance ammeter. Ammeters usually have a fairly small current
limit, and so the ammeter might very likely get damaged in such a scenario. Also, if the ammeter is inserted across a
voltage source, the source will provide a large current, and again the meter
will almost certainly be damaged, or at least disabled by burning out a fuse.
本题详细解析:
暂无
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