a) Field current b) Applied voltage c) Resistance in series with armature d) Any of these Ans: (d)
a) 1/2 back emf b) √2 back emf c) 2 back emf d) 1/√2 back emf Ans: (c)
a) Can be controlled by shunt field regulator b) Can not be controlled by diverter c) Increases as flux decreases d) Increases as armature circuit resistance increases Ans: (c)
a) Always constant b) Directly proportional to back emf c) Directly proportional to flux d) Inversely proportional to the product of back emf and flux. Ans: (b)
a) Infinity b) Higher than no load speed c) Equal to the no load speed d) Lower than the no load speed Ans: (c)
a) Unaltered b) Zero c) Doubled d) Halved Ans: (c)
a) Low speed operation b) High speed operation c) Variable speed variation d) Fixed speed operation Ans: (c)
a) Infinitely large b) Large c) About 100Ω d) Small Ans: (d)
a) Not run b) Burn out c) Run smoothly d) Run with less efficiency and high sparking Ans: (d)
a) Series motor b) Shunt motor c) Cumulatively compound motor d) Differentially compound motor Ans: (b)
 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 |