25, Two reaction theory is used in the analysis of Synchronous machine to take into account the ;

(ക) Difference in the number of poles in stator and rotor of a Cylindrical pole
machine

(0) Non uniformity of air gap between stator and rotor of a salient pole machine

(C) Non uniformity of air gap between stator and rotor of a eylindrical pole machine

0) ‏خلا‎
‎26. In a transformer delivering a variable load, Zero voltage regulation can occur at :

(ಸಿ) 0.45 lagging power factor load (8) unity power factor load
(८) 08 ing power factor load (D) 0.7 leading power factor load

nce in the number of poles in stator and rotor of a salient pole machine

27. In an alternating voltage supply ೦8 constant voltage feeding a Transformer, the presence of

higher order harmonics can cause significant changes in :
(A) Copper losses (B) Regulation
(¢) Core losses (D} - All of the above
28. The Maximum percentage efficiency of a 1KVA transformer with iron losses equal to 126 W
at upf load is :
(ക 90 ® 72
(0) 60 (D) 80
29. Which among the following logic families are fastest in operation?
(ക ECL (B) TTL
0 05 (D) DTL
30. De Morgan's Law says :
(^) NOR Gate is NOTed AND Gate (B) NAND Gate is NOTed OR Gate
(0 Both (A) and (B) above (1)) None of the above

31. Which of the following is/are the features of an Asynchronous counter?
(4) The s clock pulses are applied to all the constituent Flip flops at a time

32. Which one of the following is fully CORRECT regarding 8085 microprocessor?

(D) It has hardware and software interrupts

030/2016