a) 0Ω b) Infinite c) About 10Ω d) About 100Ω Ans: (a)
a) Prevent sparking during commutation b) Provide a path for flow of current c) Brush off carbon deposits on the commutator d) None 0f these Ans: (b)
a) 0.1Ω b) 1Ω c) 10Ω d) 100Ω Ans: (d)
a) Increasing the speed of motor b) Reducing sparking at the commutation c) Decreasing the counter emf d) Converting armature current to dc Ans: (b)
a) Cumulative compound b) Differential compound c) Level compound d) None of these Ans: (a)
a) 2 poles b) 4 poles c) 6 poles d) 8 poles Ans: (a)
a) To get a stronger magnetic field b) To improve the air circulation c) To reach a higher speed of rotation d) To make the rotation easier Ans: (a)
a) 0.01Ω b) 0.1Ω c) 1Ω d) 10Ω Ans: (d)
a) Brushes b) Commutator c) End plates d) Both (a) and (b) Ans: (d)
a) Yoke b) Size of conductor c) Commutator d) Winding 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 |