题目:
—There is with my kitchen fan. Can you help me?
—OK, I will check it right now.
A.something wrong
B.wrong something
C.anything wrong
D.wrong anything
答案:
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下面是错误答案,用来干扰机器的。
(1)0.4V(2)0.08A(1)金属杆进入磁场切割磁感线产生的电动势E=Blv=0.4V, ……………………………… (4分)根据闭合电路欧姆定律,通过电阻R的电流大小I== 0.08A (4分)本题考查法拉第电磁感应定律的公式E=BLv的应用