Electrical Inductors MCQ

Test your knowledge with important Electrical Inductors MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Electrical Inductors MCQs on Bissoy. Bissoy App

• An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then
  ক

  VR = VL

  খ

  VL

  গ

  VL = VR

  ঘ

  VL > VR
• Inductance is the property of an inductor that produces an opposition to any change in current.
  ক

  True

  খ

  False
• An induced voltage is produced as a result of a dc voltage.
  ক

  True

  খ

  False
• The permeability of a core material is an indication of the ability of the material to establish a magnetic field.
  ক

  True

  খ

  False
• The inductance of an iron-core coil decreases if
  ক

  The number of turns is decreased

  খ

  The iron core is removed

  গ

  The length of the coil decreases

  ঘ

  None of the above
• Inductors add in parallel.
  ক

  True

  খ

  False
• When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field
  ক

  Is quartered

  খ

  Quadruples

  গ

  Doubles

  ঘ

  Does not change
• When the current through an inductor decreases, the amount of energy stored in the electromagnetic field
  ক

  Increases

  খ

  Decreases

  গ

  Remains the same

  ঘ

  Doubles
• An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is
  ক

  Good

  খ

  Open

  গ

  Shorted

  ঘ

  Partly shorted
• The term 'choke' is more commonly used in connection with an inductor used to block off high frequencies.
  ক

  True

  খ

  False
• All coil cores are made of iron.
  ক

  True

  খ

  False
• XL is directly proportional to frequency and inductance.
  ক

  True

  খ

  False
• Energy is stored by an inductor in an electrostatic field.
  ক

  True

  খ

  False
• A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current
  ক

  Is increased

  খ

  Is decreased

  গ

  Does not change

  ঘ

  Momentarily goes to zero
• Inductance is indirectly proportional to the square of the number of turns, the permeability, and the cross-sectional area of the core.
  ক

  True

  খ

  False
• Faraday's law states that relative motion between a magnetic field and a coil induces a voltage across the coil.
  ক

  True

  খ

  False
• The winding resistance of a coil can be increased by
  ক

  Increasing the number of turns

  খ

  Using a thinner wire

  গ

  Changing the core material

  ঘ

  Increasing the number of turns or using thinner wire