A:living room
B:bathroom
C:sofa
如图所示是某磁体周围的部分磁感线,由图可知,a点的磁场比b点的磁场____(选填“强”或“弱”).请写出一个电与磁之间联系的实验名称____.
—No, I don't like sports. I often play ______ piano in my free time.