题目内容:
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:
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