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F

18. 2) List 4 advantages of three phase transformers compared to single phase transformer
(4)
b) Explain different types of de generators with respect to excitation and winding
connection (6)
MODULE 6
Answer any one full question
19. What is the necessity of earthing. Explain with neat diagram, pipe earthing. (10)
OR
20. a) With neat diagram explain the working of mercury vapour lamp. (6)

b) “LED lamps are preferred now a days” give 4 reasons supporting this statement.

(4)

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