在下图所示的四幅图中,正确标明了通电导线所受安培力F方向的是
答案:A
由左手定则可判断A对。
.The pretty young woman is now experiencing a whole new world that is incredibly awkward _________ there is true love, happiness and care.
A.when
B.where
C.how
D.that
A.副线圈输出交流电的频率为10Hz
B.交流电压表的示数为20V
C.电阻R上消耗的电功率为2kW
D.原线圈中电流的最大值为100A