本题目来源于试卷: Particulate Nature of Matter B.5 Electric Circuits，类别为 IB物理学
[单选题]
A battery with an emf of E /pzw cuyho*l/rno(8+iof oyb+4 s7s(vs connected to a variable resistor. The voltmeter connected to the variable resistor reads s47fso(yob +v4.2$V$ when the resistance is 6Ω. When the resistance is adjusted to 3 Ω the voltmeter reads 3.6$V$.
What is the internal resistance of the battery?
A. 0.6Ω
B. 0.8Ω
C. 1.0Ω
D. 1.2Ω
参考答案: D
本题详细解析:
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