本题目来源于试卷: DC Circuits，类别为 IB物理学
[问答题]
A small battery-operam:b r s(s:bd+rn+ou3 bted f .b3hp2y 3qzby,e2olp;/qxfslashlight requires a single 1.5-V battery. The bulb is barely glowing, but when you take the battery out and check it with a voltmeter, it rego2qqh, e.2bbyx/syzpf l;33pisters 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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