一个电阻 两端的电压为 ,通过它的电流为:
Answer and explanation
Correct answer: A.
其他选项为什么不对: 代入检验,、、都与算出的 不符。
- Step 1: 欧姆定律 。
- Step 2: 。
Answer
.
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Correct answer: A.
Free questions with an explanation for every one, and full timed Gaokao mock tests.