Inductors Questions and Answers

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Showing 10 of 99 questions
Q81
A magnet consisting of a coil of wire wound around a soft iron or steel core is called an electromagnet.
  • A TRUE
  • B FALSE
Answer: Option A
Q82
An ideal inductor would not dissipate any energy.
  • A TRUE
  • B FALSE
Answer: Option A
Q83
Five time constants are required for current in an inductor to reach a maximum value.
  • A TRUE
  • B FALSE
Answer: Option A
Q84
The quality factor of an inductor is the ratio of inductive reactance to the winding resistance of the coil.
  • A TRUE
  • B FALSE
Answer: Option A
Q85
In a dc circuit, the only conversion of energy to heat is in the inductance of the coil itself.
  • A TRUE
  • B FALSE
Answer: Option B
Q86
Inductance is proportional to the cross-sectional area of a coil.
  • A TRUE
  • B FALSE
Answer: Option A
Q87
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.
  • A TRUE
  • B FALSE
Answer: Option A
Q88
For inductions in series, LT = L1 + L2 + L3 +...
  • A TRUE
  • B FALSE
Answer: Option A
Q89
Maximum power will transfer across a transformer when the primary impedance equals the secondary impedance.
  • A TRUE
  • B FALSE
Answer: Option A
Q90
Increasing the inductance value in an ac inductive circuit will lower the circuit current.
  • A TRUE
  • B FALSE
Answer: Option A

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