Q51. A synchronous motor has excitation emf of 0.6 pu. If it is operated from a bus voltage of 1.0 pu and drawing 1.0 pu zero power factor leading current, the synchronous reatance of the motor will be

Q52. An alternator running at 1500RPM & Delivering 30Amp current to Purely inductive load, With the field current remaining constant, if the speed is reduced to 1000RPM , The load current becomes

Q53. The armature of a three-phase alternator has 240 slots. The armature has 8 poles. Its distribution factor is ____________.

Q54. A three phase alternator having synchronous reactance 0.2 \(\Omega\) is rated as 100 MVA, 11 kV. Calculate the base current and base impedance.

Q55. If the load power factor is zero lagging, the armature reaction effect in case of a three phase alternator will be

Q56. Which method is known as optimistic method to find the voltage regulation?

Q57. A magnetisation curve represents the relationship between

Q58. Which kind of rotor is most suitable for turbo alternators which are designed to run at high speed ?

Q59. Salient poles are generally used for

Q60. For providing load power of 100MW at 0.8P.f.lagging. The ratting of an alternator, it's prime mover & transformer should respectively be