a) Galvanometer b) D.c. moving coil millivoltmeter c) D.c. moving coil ammeter d) A.c. voltmeter Ans: (b)
a) I.H.P. b) F.H.P. c) B.H.P. d) none of the above Ans: (c)
a) true c) false Ans: (a)
a) This is the unit of rating of synchronous machine b) This is the unit of torque defined at radius unit c) This is the torque, which at the synchronous speed of the machine under consideration, would develop a power of 1 watt d) This is the unit of the power when the power factor in the power equation omitted Ans: (c)
a) true c) false Ans: (a)
a) true c) false Ans: (a)
a) The equivalent load resistance is equal to the standstill reactance of the motor b) The equivalent load resistance is equal to the resistance of the rotor c) The equivalent resistance is equal to the standstill leakage impedance of the motor d) The slip is zero Ans: (c)
a) no load test b) blocked rotor test c) (a) and (b) both d) (a), (b) and stator resistance test Ans: (d)
a) true b) false Ans: (b)
a) true b) false Ans: (b)
a) Short circuit test only b) Open circuit test only c) Slip test d) Stator resistance test Ans: (a)
a) No load test only b) Short circuit test only c) Stator resistance test d) None of the above Ans: (b)
a) true b) false Ans: (a)
a) Starting torque is very high b) Motor takes five to seven times its full load current c) It will pick-up very high speed and may go out of step d) It will run in reverse direction Ans: (b)
a) Supply voltage only b) Relative velocity between flux and rotor conductors c) (a) and (b) both d) Slip Ans: (c)
 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 |