a) Adds to the supply voltage b) Regulates its armature voltage c) Helps in energy conversion d) Usually exceeds the supply voltage Ans: (c)
a) Welded to the shaft b) Keyed to the shaft c) Soldered to the shaft d) Both to the shaft Ans: (b)
a) Set of screws b) Key c) Soldering d) Welding Ans: (a)
a) Efficiency b) Speed regulation c) Starting torque d) Running torque Ans: (a)
a) To reduce hysteresis loss b) To reduce eddy current loss c) To reduce the cost of core d) To reduce the mass of the armature Ans: (b)
a) 0.1Ω b) 2Ω c) 20Ω d) 400Ω Ans: (a)
a) power input mainus copper loss b) armature current multiplied by back emf c) armature current multiplied by supply emf d) power input minus mechanical loss Ans: (b)
a) Increases proportionately b) Remains constant c) Increases slightly d) Reduces slightly Ans: (d)
a) It draws very current b) It develops excessive speed and get damaged c) There results heavy sparking at the brushes d) Circuit gets open circuited Ans: (b)
a) Shunt motor b) Series motor c) Cumulative compound motor d) Differential 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 |