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问题 问答题

有一个电阻的阻值是20Ω，当把它接到6V的电源两端时，流过此电阻的电流是多少？

答案

已知：R=20Ω，U=6V

求：I

I=

U
R
=
6V
20Ω
=0.3A

答：流过此电阻的电流是0.3A

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