What may be the cause of an AC generator to...

🔍 Key Concepts

• Faraday’s law of electromagnetic induction – what has to happen between the magnetic field and conductors for voltage to be induced • Difference between stator coils (where voltage is generated) and rotor field circuit (which creates the magnetic field) • Effect of a bus circuit breaker being open or tripped on the generator itself

💭 Think About

• Ask yourself: if the generator is mechanically turning at normal speed, what condition inside the machine must exist for no voltage at all to be produced? • Which component actually creates the magnetic field needed for voltage generation, and what happens if that magnetic field is lost? • Does a fault or breaker outside the generator stop it from producing voltage, or just stop that voltage from reaching the load?

✅ Before You Answer

• Identify which choice describes a condition that would prevent a magnetic field from being established in the machine • Decide whether a short in the stator would cause zero voltage or just abnormal/low voltage and high current • Confirm whether a tripped bus circuit breaker affects generation itself, or only distribution of power to the system

What may be the cause of an AC generator to fail to produce a voltage?

short circuit in the stator coils

speed of the rotor too fast

a tripped bus circuit breaker

an open in the rotor field circuit

🔍 Key Concepts

💭 Think About

✅ Before You Answer