Electronics-Inductors Question and Answer

Electronics-Inductors Question and Answer
81. A magnet consisting of a coil of wire wound around a soft iron or steel core is called an electromagnet.
  • TRUE
  • FALSE
Show Answer
82. An ideal inductor would not dissipate any energy.
  • TRUE
  • FALSE
Show Answer
83. Five time constants are required for current in an inductor to reach a maximum value.
  • TRUE
  • FALSE
Show Answer
84. The quality factor of an inductor is the ratio of inductive reactance to the winding resistance of the coil.
  • TRUE
  • FALSE
Show Answer
85. In a dc circuit, the only conversion of energy to heat is in the inductance of the coil itself.
  • TRUE
  • FALSE
Show Answer
86. Inductance is proportional to the cross-sectional area of a coil.
  • TRUE
  • FALSE
Show Answer
87. Lenz's law states that the current induced in a circuit due to a change in the magnetic field is so directed as to oppose the change in flux or to exert a mechanical force opposing the motion.
  • TRUE
  • FALSE
Show Answer
88. For inductions in series, LT = L1 + L2 + L3 +...
  • TRUE
  • FALSE
Show Answer
89. Maximum power will transfer across a transformer when the primary impedance equals the secondary impedance.
  • TRUE
  • FALSE
Show Answer
90. Increasing the inductance value in an ac inductive circuit will lower the circuit current.
  • TRUE
  • FALSE
Show Answer
Electronics
Questions and Answers for Competitive Exams Various Entrance Test