26. For a two terminal device, resistance decreases when the temperature increases, the device is:
27. In a hydro electric generation system, pressure variations due to rapid changes in velocity of water is mitigated using
28. In a complex network containing active voltage sources with zero internal resistances and linear bilateral elements the open circuit voltage across 2 terminals is 25V and the resistance of the network viewed from the open circuited terminal is 6.25 Ω If an eqivalent circuit comprising of only a current source and impedance is made, the current source rating is :
29. A three phase balanced delta connected load of 5 + j6 Ohm in each phase is connected to a line voltage of 400V is drawing a current from the supply. If another delta connected load of same nature and magnitude is connected in parallel, the line current drawn from the supply becomes:
30. In an synchronous generator, selective elimination of odd harmonics can be done by :
31. The surface integral of the normal component of Electric Field Intensity over a closed surface is equal to 1/E0times the total charge inside it. This is the statement of:
32. Smooth cylindrical type rotors with less diameter and large axial length are used for Synchronous generators driven by :
33. If the number of poles in a syncronous machine is 6, a slot angle of 10° mechanical, when expressed in electrical degrees is :
34. If the number of turns of an inductive coil is doubled and core length is quadrupled, other parameters being the same, the inductance of the coil became :
35. If the ratio of average charge voltage to average discharge voltage in a lead acid cell is 4/3, the ratio of its Watt Hour efficiency to Ampere hour efficiency is :
36. A three phase induction motor runs at 2% slip and its .rotor frequency is 1Hz. Stator frequency in Hertz is :
37. To have a smooth, quite running of an induction motor by reducing humming and to prevent cogging, the technique used is called :
38. If the flux per pole of a shunt-wound DC generator is halved and the number of poles is doubled, the generated e.m.f. at constant speed :
39. In dc generators, the winding used in a machine delivering low voltage, high current load is :
40. Which among the following can support a synchronous motor in Starting :
41. Two reaction theory is used in the analysis of Synchronous machine to take into account the :
42. In a transformer delivering a variable load, Zero voltage regulation can occur at:
43. In an alternating voltage supply of constant voltage feeding a Transformer, the presence of higher order harmonics can cause significant changes in :
44. The Maximum percentage efficiency of a 1KVA transformer with iron losses equal to 125 W at upf load is :
45. De Morgan's Law says :
46. The excess-3 code corresponding to decimal number 156 is :
47. A Mod-31 synchronous Counter ideally has-------------------number of flipflops.
48. Which among the following is/’arc TRUE regarding the OP AMP circuit?
49. When comparing Active and Passive filters, which of the following statements are Wrong?
50. For unipolar operation, an 8 bit Digital to Analog Converter has a resolution of:
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