🔍 Key Concepts

• AC generator voltage control and how terminal voltage is adjusted under load • The role of the exciter / field current in controlling generator output • What functions are performed by synchronizing and phase sequence switches (what they do NOT do)

💭 Think About

• Which component of an AC generator actually creates the magnetic field whose strength controls the output voltage? • Do switches used for synchronizing or phase sequence normally change the generator’s voltage, or just how/when it is connected? • When a generator is already operating, what can be adjusted smoothly to raise or lower the terminal voltage without stopping the machine?

✅ Before You Answer

• Identify which option is directly tied to field excitation / field current of the generator • Confirm which listed devices are only for connection and timing (on/off, in-phase, order of phases) rather than voltage control • Make sure the chosen answer can continuously regulate voltage under load, not just make/break a circuit