Anna University Previous Years Question Paper
Question Paper Code : 88514
B.E./B.Tech. DEGREE EXAMINATIONS, NOVEMBER/DECEMBER 2021.
Third Semester
Electronics and Instrumentation Engineering
EI 33 – ELECTRICAL MACHINES
(Common to Instrumentation and Control Engineering)
(Regulations 2008)
Time : Three hours Maximum : 100 marks
Answer ALL questions.
PART A — (10 × 2 = 20 marks)
1. What is meant by armature reaction?
2. What is the function of commutator in a DC generator?
3. Enumerate the losses in a transformer.
4. What are the different types of transformers?
5. What is synchronous speed?
6. What is the purpose of damper winding?
7. What is the condition for the maximum starting torque in three phase transformer?
8. Sketch the torque-slip characteristics of three phase induction motor.
9. Brief the working principle of universal motor.
10. What are the advantages of brushless DC motor?
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