本题目来源于试卷: Physics Unit18: Electric Currents，类别为 通用国际物理
[单选题]
In an electroplating pr r 16bcwnx5m* bm8s0hrocess, it is desired to deposit 40 mg mly7nd:2nr 2 j wo5x,aof silver on a metal part by using a current of 2.0 A. How long must the current be allowedy2rnao,j7lm dx5n: w2 to run to deposit this much silver? (The silver ions are singly charged, and the atomic weight of silver is 108.)
A. $16 \; s$
B. $18 \; s$
C. $20 \; s$
D. $22 \; s$
参考答案: B
本题详细解析:
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