a) Less than the weight of copper b) Greater than the weight of copper c) Equal to the weight of copper d) None of these Ans: (c)
a) High value of reactance b) A movable secondary winding c) A high value of resistance d) Primary and secondary windings surround-ding the core Ans: (c)
a) The magnetizing current increases and the core loss components decreases b) The magnetizing component decreases and the core loss components increases c) Both the magnetizing and core loss components decrease d) Both the magnetizing and core loss components increase Ans: (c)
a) Frequency alone b)Voltage alone c) Thickness of lamination d) All of these Ans: (d)
a) Load current alone b) Power factor of load alone c) Both (a) and (b) d) Supply frequency Ans: (c)
a) A little more than full load b) Near full load c) Half load d) Quarter load Ans: (c)
a) Efficiency b) Capacity c) Voltage ratio d) Polarity Ans: (d)
a) Conduction process alone b) Induction process alone c) Both conduction and induction processes d) Mutual coupling Ans: (c)
a) The kVA rating gets reduced b) The kVA rating gets increased considerably c) The kVA rating remain unchanged d) None of these Ans: (b)
a) Is used only one winding b) Core losses are reduced c) It needs no cooling d) It has simple construction Ans: (a)
 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 |