This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Elementary Synchronous Machines”. 1. Consider a single phase synchronous machine of cylindrical rotor type. A single phase supply is given to the stator winding and a voltmeter is connected across rotor winding. For what value of θr, the voltmeter reads maximum?
A. 90°
B. 0°
C. 45°
D. 30°
Answer:A
This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Elementary Synchronous Machines”. 1. Consider a single phase synchronous machine of cylindrical rotor type. A single phase supply is given to the stator winding and a voltmeter is connected across rotor winding. For what value of θr, the voltmeter reads maximum?
A. 90° B. 0° C. 45° D. 30°
Explanation: When θr=0, the flux linkages with the rotor are maximum, and this is indicated by a maximum voltmeter reading. 2. Consider a single phase synchronous machine of cylindrical rotor type. A single phase supply is given to the stator winding, and a voltmeter is connected across rotor winding. For what value of θr the voltmeter reads a zero?