Related Post

MCQ of Electrical Machines page-1MCQ of Electrical Machines page-2MCQ of Electrical Machines page-3MCQ of Electrical Machines page-4MCQ of Electrical Machines page-5MCQ of Basic Electrical page-1MCQ of Basic Electrical page-2MCQ of Basic Electrical page-3MCQ of Basic Electrical page-4MCQ of Basic Electrical page-5

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

MCQ of Basic Electrical page-4


≪ Previous Next ≫

31. Property of a material which opposes the production of magnetic flux in it is called

a) mmf
reluctance
c) permeance
d) Permittivity

32. Unit of mmf is

AT
b) Weber/ampere
c) Henry
d) AT/m

33. Conductance is analogous to

a) Reluctance
b) M.m.f
Permeance
d) Inductance

34. An air gap is usually inserted in magnetic circuits to

Prevent saturation.
b) Increase in mmf.
c) Increase in flux.
d) Increase in inductance.

35. Permeability is reciprocal of

Reluctivity
b) Susceptibility
c) Permittivity
d) Conductivity

36. The magnetic reluctance of a magnetic circuit decreases with

a) Decrease in cross-sectional area.
Increase in cross-sectional area.
c) Increase in length of the magnetic path.
d) Decrease in relative permeability of the magnetic material of the circuit.

37. A ring-shaped coil with fixed number of turns of it carries a current of certain magnitude. If an iron core is threaded into the coil without any change in coil dimensions, the magnetic induction density will

Increase
b) Reduce
c) remain unaffected
d) unpredictable

38. The ratio of total flux (flux in the iron path) to useful flux (flux in the air gap) is called

a) utilization factor
b) fringing factor
leakage factor
d) depreciation factor

39. According to Faraday’s law of electromagnetic induction, an emf is induced in a conductor whenever it

a) lies in a magnetic field.
b) Lies perpendicular to the magnetic field.
Cuts the magnetic flux.
d) Moves parallel to the direction of magnetic field.

40. “In all cases of electromagnetic induction, an induced voltage will cause a current to flow in a closed circuit in such a direction that the magnetic field which is caused by that current will oppose the change that produces the current”, is the original statement of

Lenz’s law.
b) Faraday’s law of magnetic induction.
c) Fleming’s law of induction.
d) Ampere’s law.


≪ 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...