科学选择题:电动机和发电机的工作原理是()a一样b不一样 图中与发电机的工作原理相同的是（ ）A．B．C．D
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正确答案 b电动机和发电机的工作原理是(不一样)
a一样 b不一样
发电机：矩形线圈在匀强磁场中转动，将机械能转化为电能
电动机：通电线圈在匀强磁场中转动，将电能转化为机械能
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