6 Ω 與 3 Ω 的兩個電阻並聯,等效電阻為何?
Answer and explanation
Correct answer: A. 2 Ω
- Step 1: 並聯:,即 。
- Step 2: Ω。
Answer
2 Ω.
Why not the others: 9 Ω:把並聯當成串聯相加;4.5 Ω:取兩電阻的平均值;18 Ω:只算了乘積,忘了除以和。
Practise more 運動學.
Free questions with an explanation for every one, and full timed GSAT (Taiwan University Entrance) mock tests.