Un-Answered Questions { Electrical Engineering }

What are the applications of autotransformers?

68


How many types of losses occur in a transformer?

66


What is a single phase autotransformer?

66


What are the conditions to be satisfied for parallel operation of dc generators?

60


Why is the air gap between the pole pieces and the armature kept very small?

72





The series field winding has low resistance while the shunt field winding has high resistance. Why?

101


What is the general system requirement of alternator?

59


What is a commutator?

64


What is meant by stator?

66


What are the various types of rotor used in the alternators?

62





Why do we perform an open-circuit test and short-circuit test on the transformer?

59


What is the universal motor?

62


What is an iron loss or core loss pi?

61


Define pole pitch?

45


What are the advantages and disadvantages of the dc motors?

61