题目内容
【题目】一个匝数N=100匝的线圈所包围的面积S=0.02 m2,在匀强磁场B=0.5 T中绕垂直于磁感线的轴以角速度ω=100π rad/s匀速转动时,在线圈中产生交流电,若自线圈通过中性面时开始计时,下列能够反映线圈中感应电动势随时间变化的图象可能是
A. [Failed to download image : http://qbm-images.oss-cn-hangzhou.aliyuncs.com/QBM/2018/4/13/1923073962196992/1924050356641792/STEM/d04439359eb647d48c3f8b2ce86f42fb.png] B. [Failed to download image : http://qbm-images.oss-cn-hangzhou.aliyuncs.com/QBM/2018/4/13/1923073962196992/1924050356641792/STEM/7f780c8974644f81958d3aba0c11efce.png] C. [Failed to download image : http://qbm-images.oss-cn-hangzhou.aliyuncs.com/QBM/2018/4/13/1923073962196992/1924050356641792/STEM/4e31b8c921a24a62bc23ca837d64f4c0.png] D. [Failed to download image : http://qbm-images.oss-cn-hangzhou.aliyuncs.com/QBM/2018/4/13/1923073962196992/1924050356641792/STEM/4589cf96e28145e68a31c995110a72f1.png]
【答案】BD
【解析】试题分析:根据公式可得该交流电的最大电压为,该交流电的周期为,在线圈中产生交流电,若自线圈通过中性面时开始计时,则在中性面时,磁通量最大,磁通量变化率最小,产生的感应电动势为零,故BD正确,AC错误
故选BD