本题目来源于试卷: Physics Unit21: Electromagnetic Induction & Faraday's Law，类别为 通用国际物理
[单选题]
A series RL circuit with inductance pnrgzh +li:(drm9i ()L and resi jn(eo.6wjuel m,n4p,stance R is connected to an $emf$. After a period of time, the current reaches a final value of 2.0 A. A second series circuit is identical except that the resistance is 2R. When it is connected to the same $emf$, what will be the final value of the current?
A. $0.50 \; A$
B. $1.0 \; A$
C. $2.0 \; A$
D. $4.0 \; A$
参考答案: B
本题详细解析:
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