The voltage output of an AC generator is controlled by（）
- Avarying the DC exciter voltage
- Bvarying the reluctance of the air gap
- Cregulating the speed of the prime mover
- Dshorting out part of the armature winding
问题
The voltage output of an AC generator
参考解析：
分类：船舶电气与船舶安全题库
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