图甲所示为验证法拉第电磁感应定律的实验装置.与电源连接的线圈I

图甲所示为验证法拉第电磁感应定律的实验装置.与电源连接的线圈I中的电流i1按 图乙所示的规律变化,电流i1在线圈I的内部产生变化的磁场,该磁场磁感应强度B与 线圈中电流i1的关系为B=ki1(其中k为常数).线圈II与电流传感器连接,并通过计算机 绘制出线圈II中感应电流i2随时间t变化的图象.若仅将i1变化的频率适当增大,则能正 确反映i2-t图象变化的是(图中以实线和虚线分别表示调整前、后的i2-t图象)

 

答案

   D   

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