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-PowerMCQ-Illumination

Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-20


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286. What will happen if strong magnetic field is applied to ferromagnetic field?

a) The domain wall motion varies
b) The domain wall motion becomes constant
c) The domain wall motion becomes reversible
d) The domain wall motion becomes irreversible

Ans: (d)

287. The attraction capacity of electromagnet will

a) Increase if the flux density decreases
b) Increase if the flux density increases
c) Increase if the core area increases
d) Increase if the core length increases

Ans: (b)

288. Which of the following statement is correct?

a) The conductivity of ferromagnetic material is better than ferrites
b) The conductivity of ferrites is better than ferromagnetic materials
c) The conductivity of ferrites is same as that of ferromagnetic materials
d) The conductivity of ferrites is very high

Ans: (b)

289. The magnetization and applied field in ferromagnetic materials are related

a) Linearly
b) Non-linearly
c) Parabolically
d) Sinusoidally

Ans: (b)

290. The effective power in a pure capacitive circuit shall be

a) Energy stored by capacitor
b) Positive
c) Half of the energy stored
d) Zero

Ans: (d)

291. A pure inductance connected across 230 V 50 Hz supply consumes 50 W. this consumption can be attributed to

a) The reactance of the inductor
b) The current flowing in the inductor
c) The big size of the inductor
d) The false statement made in this question

Ans: (d)

292. The heat generated by an electric iron is

a) Reactive power
b) True power
c) Apparent power
d) Reactive and power

Ans: (b)

293. In which of the materials the spin moments associated with two sets atoms are aligned antiparallel to each other.

a) Ferromagnetic materials
b) Anti-ferromagnetic materials
c) Ferrites
d) Ferromagnetic materials

Ans: (b)

294. Which of the following statements is correct?

a) Polarizer converts the produced hydrogen in the water in the carbon zinc battery
b) Depolarizer converts the produced hydrogen in the water in the carbon zinc battery
c) Carbon power converts the produced hydrogen in the water in the carbon zinc battery
d) Zinc chloride converts the produced hydrogen in the water in the carbon zinc battery

Ans: (b)

295. Manganese dioxide acts as depolarizer in

a) Lead acid battery
b) Carbon zinc cell
c) Dry cell
d) Zinc electrolyte cell

Ans: (c)

296. Which of the following acts as a depolarizer in carbon zinc cell?

a) Carbon power
b) Zinc chloride
c) Iron ore and carbon powder
d) Ammonia chloride

Ans: (c)

297. If the current is passed through a conductor which of the following phenomenon will be observed?

a) The magnetic field will be developed in the conductor
b) The magnetic field and heat is developed in the conductor
c) The only heat is developed in the conductor
d) The molecules of the conductor attract each other

Ans: (b)

298. The standing wave ratio of 4 will be applicable to

a) 80 ohms transmission line feeding to a load of 320 ohms
b) 20 ohms transmission line feeding to a load of 100 ohms
c) 100 ohms transmission line feeding to a load of 300 ohms
d) 50 ohms transmission line feeding to a load of 500 ohms

Ans: (a)

299. A network which does not have either voltage source or current source is called

a) Active network
b) Passive network
c) Resistive network
d) Resistive and inductive network

Ans: (b)


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