当导体的固有振动频率=30~160HZ时,需在电动力算式中引入______1的共振系数β。

第1题：

当固有频率和驱动力频率相等时才会发生共振。

第2题：

受迫振动是在周期性外力（策动力）作用下的振动，稳态时的振动频率等于系统固有频率的频率，共振是指当周期性外力的频率趋近系统固有频率时所发生的现象。

第3题：

在鱼洗实验中，下列哪个说法是正确的？ In the fish washing experiment, which of the following statements is true？

A.当鱼洗器壁的振动频率越来越接近于鱼洗固有频率时，产生共振现象； Resonance phenomenon occurs when the vibration frequency of the wall of the fish washer is closer and closer to the natural frequency of the fish washer;#B.当鱼洗器壁的振动频率大于鱼洗固有频率时，产生共振现象； Resonance phenomenon occurs when the vibration frequency of the wall of the fish washer is greater than the natural frequency of the fish washer;#C.当鱼洗器壁的振动频率小于鱼洗固有频率时，产生共振现象； When the vibration frequency of the fish

第4题：

66、在鱼洗实验中，下列哪个说法是正确的？ In the fish washing experiment, which of the following statements is true？

A.当鱼洗器壁的振动频率越来越接近于鱼洗固有频率时，产生共振现象； Resonance phenomenon occurs when the vibration frequency of the wall of the fish washer is closer and closer to the natural frequency of the fish washer;###SXB###B.当鱼洗器壁的振动频率大于鱼洗固有频率时，产生共振现象； Resonance phenomenon occurs when the vibration frequency of the wall of the fish washer is greater than the natural frequency of the fish washer;###SXB###C.当鱼洗器壁的振动频率小于鱼洗固有频率时，产生共振现象； When the vibration frequency of the fish

第5题：

阻尼对受迫振动起到抑制作用。当阻尼很小时，共振频率接近于固有频率。当阻尼为零时，共振频率等于固有频率，此时振幅趋近于无穷大。