本题目来源于试卷: DC Circuits，类别为 IB物理学
[问答题]
A small battery-operated ,cckfd8-ne;q flashlight requires a single sg (v2x,5p-idoya3 r b1.5-V battery. The bulb is barely glowing, but when you take the battery out and check it with 52,y-gbsi3pxvrda o(a voltmeter, it registers 1.5 V. How would you explain this?
参考答案:
When the voltmeter is
connected to the circuit, it reduces the resistance of that part of the
circuit. That will make the (resistor +
voltmeter) combination a smaller fraction of the total resistance of the
circuit than the resistor was alone, which means that it will have a smaller
fraction of the total voltage drop across it.
本题详细解析:
暂无
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