Particulate Nature of Matter B.5 Electric Circuits (id: cc0ff843d)

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]
An electric circuit , s.+p)ic oi;o-n0ubuz8xtp( i- fhm ac)7hc3 cpbl,p ln 8(erwith emf $ϵ$ and internal resistance r is connected to a variable resistor R which varies from 0 Ω to 6Ω.
The variation of the power dissipated in the resistor R with the value of the resistance R is shown in the graph.



What is the value of $ϵ$, if the maximum dissipated power is when R is equal to the internal resistance of the battery $r$ ?

A. 9V
B. 10V
C. 12V
D. 18V


参考答案:  C


本题详细解析:

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