a) Number of poles b) Speed of the exciter c) Exciter current d) Strength of the magnetic field Ans: (d)
a) Less noisy b) Costlier c) Larger in size d) More efficient Ans: (c)
a) Concentrated winding to distributed winding b) Distributed winding to full pitch winding c) Full pitch winding to distributed winding d) Distributed winding to concentrated winding Ans: (b)
a) Governor b) Differential protection c) Alarm d) Overcurrent relay Ans: (a)
a) Inter-turn fault protection b) Sensitive earth fault protection c) Biased differential protection d) All of these Ans: (d)
a) Heating of rotor b) Vibrations c) Double frequency currents in the rotor d) All of these Ans: (d)
a) ± 1% b) ± 2% c) ± 4% d) ± 6% Ans: (b)
a) Power factor of the load b) Amount of current drawn from the alternator c) Speed of the prime mover driving the alternator d) None of these Ans: (a)
a) Magnetizing b) Demagnetizing c) Cross-magnetizing d) None of these Ans: (a)
a) N times the fundamental emf b) Equal to the fundamental emf c) Less than the fundamental emf d) Zero Ans: (c)
 Multiple Choice Question (MCQ) of Electronics page-17:241. Which of the following statement is true? a) The saturation voltage VCF of silicon transistor is more than germanium transistor. b) The saturation voltage VCE for germanium transistor is more than silicon transistor. c) The saturation voltage VCE for silicon transistor is same as that for germanium. d) The saturation voltage VCE for silicon transistor is lower than germanium transistor. |
Multiple Choice Question (MCQ) of Electronics page-16:226. Which of the following statement is correct? a) Inner electrons are always present in the semiconductor. b) Bound electrons are always present in the semiconductor. c) Free electrons are always present in the semiconductor. d) Inner and bound electrons are always present in the semiconductor. |
Multiple Choice Question (MCQ) of Electronics page-15:211. The materials whose electrical conductivity is usually less than 1 × 106 mho/m are a) Semiconductors b) Conductors c) Insulators d) Alloys |
Multiple Choice Question (MCQ) of Electronics page-14:196. In which of the following device the base resistors are not added in the package but added externally? a) UJT b) CUJT c) PUT d) None of the above |
Multiple Choice Question (MCQ) of Electronics page-13:181. The conduction in JEFT is always by the a) Majority carriers b) Minority carriers c) Holes d) Electrons e) Holes and electrons simultaneously |