a) 0.5 to 0.7 b) 0.8 to 1.0 c) 1.1 to 1.3 d) 1.4 to 1.6 Ans: (c)
a) Armature b) Series field c) Shunt field d) Any of the above Ans: (a)
a) Ac b) Dc c) Ac as well as dc d) Transient Ans: (a)
a) The effect of magnetic field set up by field current b) The effect of magnetic field set up by armature current c) The effect of magnetic field set up by back emf d) Copper losses in the armature Ans: (b)
a) Dc series motor b) Dc shunt motor c) Dc series generator d) Dc shunt generator Ans: (c)
a) Increases proportionately b) Decreases in reverse proportion c) Remains constant d) Increases proportional to the square root of current Ans: (a)
a) The speed of the motor b) Flux required in the moor c) Torque required d) Voltage applied to the motor Ans: (c)
a) Commutation improves and speed decreases b) Commutation is unaffected and speed increases c) Commutation improves and speed increases d) Commutation worsens and speed decreases Ans: (c)
a) Half b) Slightly more than half c) Double d) Slightly less than double Ans: (d)
a) Opposes the applied voltage b) Assists the applied voltage c) Does not influence the applied voltage d) None of these 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 |