ASSIGNMENT
CHAPTER: 1
1] State & explain different methods of electro-mechanical energy conversion.
2] Explain role of electrical energy and uses. Write down advantages of electrical energy.
3] Explain singly excited and doubly excited field system.
4] List out five phenomenon affecting the electromechanical conversion & explain piezoelectricity and
magnetostriction.
CHAPTER: 2
1] Explain the construction of D. C. machine with neat sketch and explain function of each part.
2] State and explain different types of D. C. generator.
3] Compare lap winding and wave winding.
4] Derive E.M.F. equation of D.C. generator.
5] List and explain various losses occurring in D.C. generator.
6] Draw and explain the power stage diagram for dc generator.
7] Derive the condition for maximum efficiency for dc generator.
8] What is armature reaction? Explain its effect on the main flux with diagram.
9] What is commutation? Explain in detail.
10] Draw and explain internal & external characteristics of following dc generator.
i) DC shunt generator. ii) DC series generator. iii) DC cumulative & differential compound
generator.
CHAPTER: 3
1] Explain the basic principle of dc motor.
2] What is back emf? Explain its importance in dc motor.
3] Derive the equation of torque for dc motor.
4] State and explain various speed control methods for dc series and shunt motor.
5] Explain ward Leonard method of speed control for dc motor.
6] What is the necessity of starter in dc motor? Explain three point starter for dc motor.
7] Draw and explain power stages of dc motor. Derive the condition for maximum power developed in the
armature of motor.
8] Explain the brake test or direct load test of dc motor.
9] Explain the swinburn’s test or indirect test of dc motor.
10] State the various applications for different types of dc motor.
CHAPTER: 4 & 5
1] Derive the E.M.F. equation of single phase Transformer.
2] Explain the construction of single phase transformer.
3] Draw and explain no load vector diagram of transformer.
4] Draw the vector diagram of transformer with lagging p.f. load OR with leading p. f. load.
5] Draw and explain equivalent circuit of single phase transformer.
6] Explain the direct loading test of transformer.
7] Explain the O.C. & S.C. test of transformer.
8] Draw and explain the circuit diagram of Sumpner test (back to back) test.
9] Explain the need of parallel operation of transformer. State & Explain the conditions for parallel operation
of transformer.
10] Explain single phase transformer and state its application.
11] Explain the voltage regulation and the factors affecting the voltage regulation.
12] Explain the different types of losses occur in the transformer.
13] Derive the condition for maximum efficiency for single phase transformer.
14] Explain All day efficiency for distribution Transformer.