Synchronous Motors MCQ Questions & Answers | Electrical Engineering

A. small induction motor

B. D.C. series motor

C. D.C. shunt motor

D. double winding A.C./D.C. motor

A. the rotor excitation only

B. the supply voltage only

C. the rotor excitation and supply volt-age both

D. the rotor excitation, supply voltage and maximum value of coupling angle (90°)

A. Of reducing number of slip rings on the rotor

B. Armature is associated with large power as compared to the field circuits

C. Of difficulty of providing high voltage insulation on rotor

D. All of the above reasons

A. direcly proportional to the synchronous reactance

B. inversely proportional to the synchronous reactance

C. equal to the synchronous reactance

D. none of the above

A. remain same

B. go down

C. improve

D. none of the above