EM-II EMF method

What is the voltage regulation of a synchronous generator?

• A) The difference between the no-load voltage and the full-load voltage

• B) The ratio of the full-load voltage to the no-load voltage

• C) The difference between the armature voltage and the excitation voltage

• D) The ratio of the armature voltage to the excitation voltage

What is the effect of increasing the excitation of a synchronous generator?

• A) The voltage regulation increases

• B) The voltage regulation decreases

• C) The voltage regulation remains constant

• D) The voltage regulation becomes negative

Which of the following factors affects the voltage regulation of a synchronous generator?

• A) Load power factor

• B) Armature resistance

• C) Excitation voltage

• D) All of the above

What is the formula for calculating the voltage regulation of a synchronous generator using the EMF method?

• A) (VNL - VFL) / VFL

• B) (VFL - VNL) / VNL

• C) (VNL + VFL) / VFL

• D) (VFL + VNL) / VNL

What is the formula for voltage regulation using the EMF method?

• a) % voltage regulation = (E0 - V)/V 100%

• b) % voltage regulation = (V - E0)/V 100%

• c) % voltage regulation = (E0 - V)/E0 100%

• d) % voltage regulation = (V - E0)/E0 100%

What is the typical value of synchronous generator voltage regulation using the EMF method?

• a. 0%

• b. 10%

• c. 25%

• d. 50%

Which factor does NOT affect the voltage regulation of a synchronous generator using the EMF method?

• a. Load power factor

• b. Synchronous impedance

• c. Excitation level

• d. Armature resistance

What is the voltage regulation of a synchronous generator?

• a) The change in generator voltage with respect to a change in load

• b) The difference between the no-load voltage and the full-load voltage

• c) The ratio of the full-load voltage to the no-load voltage

• d) The change in generator frequency with respect to a change in load

Which parameter of a synchronous generator affects its voltage regulation?

• a) Armature resistance

• b) Field resistance

• c) Load angle

• d) Synchronizing power

What is the effect of an increase in load angle on the voltage regulation of a synchronous generator?

• a) Decreases the voltage regulation

• b) Increases the voltage regulation

• c) Has no effect on the volt

• d) Cannot be determined