Related Post

Multiple Choice Question (MCQ) of Electronics page-10Multiple Choice Question (MCQ) of Electronics page-9Multiple Choice Question (MCQ) of Electronics page-2Multiple Choice Question (MCQ) of Electronics page-3Multiple Choice Question (MCQ) of Electronics page-4Multiple Choice Question (MCQ) of Electronics page-5Multiple Choice Question (MCQ) of Electronics page-6Multiple Choice Question (MCQ) of Electronics page-7Multiple Choice Question (MCQ) of Electronics page-8Multiple Choice Question (MCQ) of Electronics page-11Multiple Choice Question (MCQ) of Electronics page-12Multiple Choice Question (MCQ) of Electronics page-13Multiple Choice Question (MCQ) of Electronics page-14Multiple Choice Question (MCQ) of Electronics page-15Multiple Choice Question (MCQ) of Electronics page-16Multiple Choice Question (MCQ) of Electronics page-17

Index

SymbolsTransformerRelayPower-SystemBasic-electricalACSR-ConductorCircuit-BreakerInterview-questions-of-Basic-ElectricityInterview-questions-of-transformerInsulatorCurrent-TransformerMCQMCQ-powersystemThermal-power-stationInterview-questions-of-Power-SystemPower-ElectronicsInterview-questions-of-Underground-CableInterview-questions-of-IlluminationIlluminationMCQ-of-ElectronicsMCQ-of-Basic-ElectricalMCQ-of-Transformers MCQ-of-D.C-motor MCQ-of-D.C-generatorsMCQ-Control-SystemMCQ-Measurementsmcq-of-Generation-power-systemMCQ-of-Induction-MotorMCQ-of-Transmission-DistributionMCQ-of-Electrical-MachinesMCQ-of-Alternator-and-Synchronous-MotorsMCQ-Electric-Power

Multiple Choice Question (MCQ) of Electronics page-13


≪ Previous Next ≫

181. The conduction in JEFT is always by the

a) Majority carriers
b) Minority carriers
c) Holes
d) Electrons
e) Holes and electrons simultaneously

Ans: (a)

182. Which of the following can be used as an adjustable temperature coefficient device?

a) Zener diode
b) Gas filled tubes
c) JFET
d) P-n-p transistor

Ans: (c)

183. The “pinch off” voltage of a JFET can range from

a) 4 to 8 V
b) -4 to -8 V
c) 0.4 to -0.8 V
d) -0.4 to -8 V
e) 0.4 to 8 V

Ans: (d)

184. Multiplexer is an electronic device which is used for

a) Multiplication of two or more quantities
b) Superimposition of two or more electrical signals of different frequencies for their parallel transmission through one channel
c) Scanning of analog or digital inputs on “Time-Sharing” basis
d) (b) and (c) both

Ans: (d)

185. MOSFETs are not suitable for low voltage switching.

a) True
b) False

Ans: (b)

186. Enumerate five special features of MOSFETs

a) Fast switching
b) Low drive current
c) No second breakdown
d) Ease of paralleling
e) Excellent temperature stability

Ans: (c)

187. What is the critical range of conduction-angle control of a thyristor outside which the conduction-angles have very little effect on percentage applies power to the load?

a) 30° to 90°
b) 0° to 90°
c) 40° to 140°
d) 0° to 180°
e) None of the above

Ans: (c)

188. If an SCR is manufactured for maximum junction temperature of 130°C, ambient temperature of 85°C and thermal resistance (from junction to ambient) of 1.5°C per watt, what will be the maximum internal power dissipation?

a) 30 watts
b) 60 watts
c) 175 milliwatts
d) 300 milliwatts

Ans: (a)

189. An SCR cannot be brought in conduction state without gate current.

a) True
b) False

Ans: (b)

190. The disease “sleeping sickness” is observed in

a) Junction transistors
b) Coated cathodes valves
c) (a) and (b) both
d) Integrated circuits

Ans: (c)

191. If the diagonal measure of television screen in 50 centimetres, what will be the width of screen as per American Standard?

a) 30 cm
b) 40 cm
c) 50 cm
d) 35 cm

Ans: (a)

192. Which of the following diodes has almost zero minority carrier storage time?

a) Rectifier
b) Schottky
c) PIN
d) Zener
e) Tunnel

Ans: (b)

193. Schottky diode essentially consists of

a) P-n junction
b) Metal-to-semiconductor junction
c) P and n regions separated by an intrinsic region
d) P-n junction with every heavy dropping

Ans: (b)

194. Schottky diode is a majority carrier device.

a) True
b) False

Ans: (a)

195. The UJT often reduces the number of components necessary to perform a given function to less than half that required if bipolar transistors are used

a) True
b) False

Ans: (a)


≪ Previous Next ≫


Related topics :


Recent Post

Multiple Choice Question (MCQ) of Materials page-6:
51. The permeability and permittivity of a medium are
A) independent of each other
B) related by the atomic number
C) related by the Boltzmann’s constant
D) related by the velocity of electromagnetic waves.

Read more...

Multiple Choice Question (MCQ) of Materials page-5:
41. Bakelite is
A) highly inflammable
B) low resistance conductor
C) a semi-conductor
D) uncombustible.

Read more...

Multiple Choice Question (MCQ) of Materials page-4:
31. Which of the following pairs is commonly used in thermocouples?
A) Copper-constant
B) Aluminium-tin
C) Iron-steel
D) Silver-German silver.

Read more...