本题目来源于试卷: Physics Unit21: Electromagnetic Induction & Faraday's Law，类别为 国际高中通用物理
[单选题]
A series RL circuit with inducx u)s(t bf5 p3i o,shnp+ kn14a/w*dfctance L and 1c oca qxt 69ag.j41uhresistance 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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