a) Dissipates energy in armature circuit b) Dissipates energy in field circuit c) Both (a) and (b) d) Supply energy to source Ans: (d)
a) It will start revolving in other direction at low speed b) Motor will stop c) Motor will burn d) None of these Ans: (a)
a) That speed above normal speed can be achieved b) That commutation becomes unsatisfactory c) Its low efficiency d) None of these Ans: (b)
a) A.C. excitation to the field of the motor b) Variable excitation to the field of the motor c) constant excitation to the field of the motor d) no excitation to the field of the motor Ans: (c)
a) increased maintenance cost b) its high initial cost c) its low efficiency at light loads d) all of them Ans: (d)
a) field diverter method b) field control method c) armature resistance control method d) voltage control method Ans: (d)
a) two b) three c) four d) five Ans: (b)
a) wide range of sensitive speed control is required b) wide range of speed control is required c) narrow range of speed control is required 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 |