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单选题
发电机产生的三相电压的频率与发电机转子转速成正比。
A
The generators supply a three-phase voltage. The frequency of this voltage increases when the generator rotor speed increases.
B
The rate of the three-phase voltage generated by the generator is proportional to the rotational speed of the generator rotor.
C
The frequency of the three-dimensional voltage produced by the generator is changed with the rotational speed of the generator rotor.
答案解析
正确答案：A
相关知识点：
发电机电压频率与转速有关
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