A-A+
In Henry's experiment the galvanometer indicat
问题详情
In Henry"s experiment，the galvanometer indicated a voltage when______.
A. the coil was connected to a battery
B. the coil was disconnected to a battery
C. neither A nor B
D. both A and B
参考答案
正确答案：D
[解析] 答案见文章10～15句。
