Particulate Nature of Matter B.5 Electric Circuits (id: 788756719)

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]
In the circuit shown, a resij-5x+j 4otw4ee q:5s8pxnlc e s,-y u6v n8gong/ q9pjla 5xlu0tor of $5\,Ω$ is connected to a long resistive wire with resistance of $15\,Ω$ through a sliding contact that can move along the entire length of the wire. Both are connected to a power supply with $15\,V$ of emf and negligible internal resistance.


What is the maximum and minimum values of current through the power supply?
Maximum current /A$\,$$\,$$\,$Minimum current /A

A. Maximum current /A3.0;Minimum current /A 0.75
B. Maximum current /A4.0;Minimum current /A 0.75
C. Maximum current /A3.0;Minimum current /A 1.0
D. Maximum current /A4.0;Minimum current /A 1.0


参考答案:  D


本题详细解析:

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