a) Go quickly to 100 ohms and remain there b) Show low resistance momentarily and back off to a very high resistance c) Not move at all d) Show very high resistance first and then low Ans: (b)
a) Voltage coil inductance b) Voltage coil capacitance c) Eddy currents d) (a), (b) and (c) Ans: (d)
a) One wattmeter method b) Two wattmeter method c) Three wattmeter method d) Ammeter method Ans: (b)
a) The power when load is balance in three phase circuit b) The power when load is unbalanced in three phase circuit c) (a) or (b) d) Single phase power with balanced load Ans: (a)
a) 90° b) 180° c) 45° d) 0° e) 120° Ans: (a)
a) True b) False Ans: (b)
a) One wattmeter b) One wattmeter and one voltage transformer of 1:1 ratio c) One wattmeter and two current transformers of 1:1 ratio d) Either (b) or (c) Ans: (d)
a) P = 3VI cos ϕ b) P = √I cos ϕ c) P = √3VI cos ϕ d) P = √2VI cos ϕ Ans: (c)
Where V and I are the line voltage and line current respectively.
a) P = 3 VI cos ϕ b) P = √3 VI cos ϕ c) P = √2 VI cos ϕ d) P = √3 VI sin ϕ Ans: (b)
a) AC power only b) DC power only c) AC or DC power d) AC power of single-phase circuits 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 |