a) Increase by a factor of 4 b) Remain same c) Increase by a factor 2 d) Decrease by a factor 2 Ans: (b)
a) Magnetic losses b) Mechanical losses c) Field copper loss d) Armature copper loss Ans: (b)
a) Mechanical losses b) Magnetic losses c) Winding losses d) Both (a) and (b) Ans: (d)
a) Reactance voltage b) The capacitor action with two segment as electrodes and mica as the dielectric c) The air gap between the brushes and the commutator surface d) None of these Ans: (a)
a) Field b) Brush c) Armature d) Compensating pole Ans: (a)
a) Shift the brushes in lagging direction of rotation b) Shift the brushes in leading direction of rotation c) Interchange the terminals at the brushes d) None of these Ans: (b)
a) Stray losses are equal to copper losses b) Magnetic losses are equal to mechanical losses c) Armature copper losses are equal to constant losses d) Field copper losses are equal to constant losses Ans: (c)
a) 0 - 10% of full load losses b) 10 -20% of full load losses c) 20 – 30% of full load losses d) 30 – 40 % of full load losses Ans: (d)
a) Stray losses b) Field losses of shunt generator c) Armature losses of a compound generator d) Both (b) and (c) Ans: (d)
a) Avoid overhang b) Avoid noise c) Avoid harmonics d) Avoid unequal distribution of current at brushes Ans: (d)
 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 |