Physics Unit18: Electric Currents (id: 67aa578ed)

本题目来源于试卷: Physics Unit18: Electric Currents，类别为 国际高中通用物理

[单选题]
A 500-W device is connected to a 120-V ac-a rmbqwd+wc2*v.d u; power source. What rms curre e;aena3v8-rxoxs 28knt flows throughv 3karna8o8x s2x e;e- this device?

A. $4.2 \; A$
B. $5.9 \; A$
C. $120 \; A$
D. $170 \; A$


参考答案:  A


本题详细解析: 暂无

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