Electrical Inductors MCQ

Electrical Inductors MCQ

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  • 29th Mar, 2022

Electrical Inductors MCQ Questions

Take Electrical Inductors MCQ Test & Online Quiz to test your Knowledge

Below is the Electrical Inductors MCQ test that checks your basic knowledge of Electrical Inductors. This Electrical Inductors MCQ Test contains 20 Multiple Choice Questions. You have to select the right answer to the question. apart from this, you can also download here the Electrical Inductors MCQ PDF, completly free.

Electrical Inductors MCQ Test

1) Inductance is the property of an inductor that produces an opposition to any change in current.

  • A. True
  • B.False

2) The inductance of an iron-core coil decreases if ___.

  • A. The number of turns is decreased
  • B.The iron core is removed
  • C.The length of the coil decreases
  • D.None of the above

3) A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is ___.

  • A. 9.9 mH
  • B.Greater than 5 mH
  • C.9.9 mH or greater than 5 mH
  • D.Less than 0.6 mH

4) Electricity may be generated by a wire:

  • A. carrying current
  • B.passing through a flux field
  • C.that has neutral domains
  • D.wrapped as a coil

5) The electrical energy consumed by a coil is stored in the form of a magnetic field.

  • A. True
  • B.False

6) When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field ___.

  • A. is quartered
  • B.quadruples
  • C.doubles
  • D.does not change

7) The term ‘self-inductance’ is used when a conductor has a voltage induced in it by:

  • A. its own magnetic field
  • B.nearby electromotive force
  • C.its own electromotive force
  • D.a nearby magnetic field

8) What is magnetic flux?

  • A. The number of lines of force in webers
  • B.The number of lines of force in maxwells
  • C.The number of lines of force in teslas
  • D.The number of lines of force in flux density

9) Which type of device consists of a coil with a moveable iron core?

  • A. solenoid
  • B.reed switch
  • C.relay
  • D.armature

10) Opposition to current flow without the dissipation of energy is called ___.

  • A. resistance
  • B.inductive reactance
  • C.counter emf
  • D.impedance

11) What is the name of the part inside a relay that is moved by the action of the electromagnet?

  • A. armature
  • B.conductor
  • C.contacts
  • D.solenoid

12) A crack in the magnetic path of an inductor will result in ___.

  • A. unchanged inductance
  • B.increased inductance
  • C.zero inductance
  • D.reduced inductance

13) The coefficient of coupling between two air core coils depends on _____.

  • A. Self inductance of two coils only
  • B.Mutual inductance between two coils only
  • C.Mutual inductance and a self inductance of two coils
  • D.None of the above

14) What is the voltage across a coil when di/dt = 20 mA/µs and L = 8 µH?

  • A. 16 mV
  • B.160 mV
  • C.1.6 mV
  • D.2.5 mV

15) The permeability of a core material is an indication of the ability of the material to establish a magnetic field.

  • A. True
  • B.False

16) Which of the following circuit element stores energy in the electromagnetic field?

  • A. Inductance
  • B.Condenser
  • C.Variable resistor
  • D.Resistance

17) A sine wave voltage is applied across an inductor, When the frequency of the voltage is decreased, the current is increased.

  • A. True
  • B.False

18) An open coil has ___.

  • A. Zero resistance and inductance
  • B.Infinite resistance and zero inductance
  • C.Infinite resistance and normal inductance
  • D.Zero resistance and high inductance

19) The direction of induced e.m.f. can be found by which of the following law?

  • A. Laplace's law
  • B.Kirchhoff's voltage law
  • C.Fleming's right hand rule
  • D.Lenz's law

20) Mutual inductance between two magnetically coupled coils depends on:

  • A. Permeability of the core material
  • B.Number of turns of the coils
  • C.Cross sectional area of their common core
  • D.All of the above

21) Inductance is indirectly proportional to the square of the number of turns, the permeability, and the cross-sectional area of the core.

  • A. True
  • B.False

22) A 240 µH inductor is equivalent to a ___ inductor.

  • A. 0.240 mH
  • B.0.000240 mH
  • C.240 mH
  • D.240 H

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