a) Zero leading b) less than unity c) Unity d) More than unity Ans: (c)
a) Shifting the brush positions b) Using interpoles c) Using a magnetizing pole d) None of these Ans: (a)
a) Synchronous impedance method b) Politer triangle method c) MMF method d) None of these Ans: (b)
a) Speed b) Load c) Field excitation d) Phase sequence Ans: (c)
a) Large number of poles b) Small number of poles c) Small diameters d) Long cores Ans: (a)
a) 60° phase groups b) 120° phase groups c) 180° phase groups d) 240° phase groups Ans: (a)
a) Windage losses b) Operating speed c) Generated voltage per phase d) Waveform of generated voltage Ans: (c)
a) Magnetization of the main field b) Demagnetization of the main field c) Distortion of the main field d) None of these Ans: (c)
a) Machine with excess excitation will burn b) Both machines will start vibrating c) Power output will decrease d) Wattles component will change Ans: (d)
a) Fixed frequencies b) Variable frequencies c) Fixed currents d) Fixed power factors Ans: (a)
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 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 |