Thursday, February 24, 2022

Anna University EE1211 Electrical Machines Nov Dec 2021 Question Paper

Anna University Previous Years Question Paper

Question Paper Code : 82420

B.E./B.Tech. DEGREE EXAMINATIONS, NOVEMBER/DECEMBER 2021.

Third Semester

Electronics and Communication Engineering

EE 1211/EE 1261 — ELECTRICAL MACHINES

(Common to Electronics and Instrumentation Engineering/Instrumentation and

Control Engineering and Biomedical Engineering)

(Regulations 2004/2007)

Time : Three hours Maximum : 100 marks

Answer ALL questions.

PART A — (10 × 2 = 20 marks)

1. What is the significance of back emf?

2. What is the necessity of a starter?

3. Why is transformer core laminated? What type of material is used in this?

4. Draw the phasor diagram for a transformer under no load. Mention the current components?

5. Define slip of an induction motor.

6. List out four applications of single phase induction motor.

7. State the main parts of a synchronous motor.

8. How the field winding is excited in a brushless alternator?

9. List out the types of power generation systems.

10. What is the voltage level of a sub-transmission system?

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