如图所示,50匝矩形闭合导线框 ABCD 处于磁感应强度大小为 B = T 的水平匀强磁场中,线框面积 S = 0.5m 2,线框电阻不计。从图示位置开始计时,线框绕垂直于磁场的轴OO′以角速度 ω="200rad/s" 匀速转动,并与理想变压器原线圈相连,副线圈接入一只“220V 60W”灯泡,且灯泡正常发光。下列说法正确的是( )
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