a) High at low loads and low at high loads b) Low at low loads and low at high loads c) Varies at low loads and constant at high loads d) Same at all loads Ans: (d)
a) Increases the weight per kW b) Increases the weight per kVA c) Decreases the weight per kVA d) Decreases the weight per kW Ans: (c)
a) About the same b) Much higher c) Much smaller d) Slightly higher Ans: (b)
a) 60° b) 45° c) 30° d) 80° Ans: (d)
a) Has core of stainless steel b) Has no losses and magnetic leakage c) Has a common core for its primary and secondary windings d) Has inter leaved primary and secondary windings Ans: (b)
a) In phase with each other b) Antiphase with each other c) Of different frequency d) Equal in magnitude Ans: (a)
a) Full load b) No load c) 50% of full load d) 75% of full load Ans: (c)
a) Eddy current losses b) Hysteresis losses c) Both eddy current and hysteresis losses d) Noise generated in the transformer Ans: (b)
a) High resistivity and high hysteresis loss b) High resistivity and low hysteresis loss c) Low resistivity and high hysteresis loss d) Low resistivity and low hysteresis loss Ans: (b)
a) Zero b) 100% c) 50% 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 |